Circular Ducts 2014 -...
Transcript of Circular Ducts 2014 -...
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
DVAC, One Of The Premium Workshops Specialized in Duct Fabrication
has Executed Several Projects
(Residential, Governmental, Commercial, Industrial & Institutional).
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Spiral Circular Ducts
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
3
Table of Contents:
Circular Ducts: Single Wall
Duct Support ........................................................................ 31
;Circular Ducts Single Wall:Page
............................................................................Tolerance . 5
.............................................................................Materials . 6-7
...........................................................................SI System . 8---11
.............................................................................Pressure . 12---15
......................................................Pressure Drop Diagram . 16---18
.........................................................Method of Installation . 19
........................................Thickness Schedule - For Fittings 20
..................................DVAC Standard Specs. - Spiral Tube 21
............................DVAC Standard Specs. - Grooved Seam 22
Fittings 23
Accessories
BFL15 BFLCSDS RCLL CLL RSB 22.5° °
° ° ° °30 45 60 90BFL BFL BFL BFL 24
TSB 2SB90 BFLB90 CO TCL XCL° ° 25
TCL45 TCCL45 RT45 RCT45 TY45 STO° ° ° ° ° 26
TCPL TC RSWP RCSWP RSP CSF 27
CS B90° B60° B45° CSP CBP 28
ECM ECF MC FC CAF CFF 29
CWC RC JC SDT 30
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
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Table of Contents:
Double WallCircular Ducts:
33
32
37
..................................DVAC Standard Specs. - Spiral Tube
.........................................................Method Of Installation.
Fittings
° ° ° °30 45 60 90BFL BFL BFL BFL
TSB 2SB90 BFLB90 CO TCL XCL° °
TCL45 TCCL45 RT45 RCT45 TY45 STO° ° ° ° °
38
39
Circular Ducts Double Wall:
41
36
.......................................Thickness Schedule - For Fittings
............................DVAC Standard Specs. - Grooved Seam
34
35
BFL15 BFLCSDS RCLL CLL RSB 22.5° °
TCPL TC RSWP RCSWP RSP CSF
CS B90° B60° B45° CSP CBP
40
Page
42ECM ECF MC FC CAF CFF
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Tolerance
α Tolerance
± 2o
ΦD, D , D , D , D1 2 3 4
nomTolerance
rangeLi
nom
100125140
98,8 - 99,3123,8 - 124,3138.7 - 139.3
505050
150160180
148,7 - 149,3158,7 - 159,3178,6 - 179,3
505050
200224250
198,6 - 199,3222,5 - 223,3248,5 - 249,3
505050
280300315
278,4 - 279,3298,4 - 299,3313,4 - 314,3
505050
355400450
353,3 - 354,3398,3 - 399,3448,2 - 449,3
505050
500550560
498,2 - 499,3548,1 - 549,3558,1 - 559,3
505050
600630650
598,1 - 599,3628,1 - 629,3648,1 - 649,3
505050
710750800
708,0 - 709,3748,0 - 749,3798,0 - 799,3
505050
850900950
848,0 - 849,3897,9 - 899,3947,9 - 949,3
505050
100010501100
997,9 - 999,31047,9 - 1049,31097,9 - 1099,3
505050
112011501200
1117,8 - 1119,31147,8 - 1149,31197,8 - 1199,3
505050
125013001350
1247,8 - 1249,31297,8 - 1299,31347,8 - 1349,3
505050
140014501500
1397,3 - 1398,81447,3 - 1448,81497,3 - 1498,8
100100100
160018002000
1596,5 - 1598,21796,5 - 1798,21996,5 - 1998,2
100100100
23002500
2294,5 - 2298,02491,5 - 2497,5
100100
Weight
± 10%
Sheet metal thickness
As in sheet metal standardEN 10143:1993
L, L , L , etc1 3 Tolerance
0 - 15+0-2
16 - 100+0-5
101 -+0-10
L ±5
AngleLength
ΦDnom
Tolerancerange
100125140
100,0 - 100,5125,0 - 125,5140,0 - 140,6
150160180
150,0 - 150,6160,0 - 160,6180,0 - 180,7
200224250
200,0 - 200,7224,0 - 224,8250,0 - 250,8
280300315
280,0 - 280,9300,0 - 300,9315,0 - 315,9
355400450
355,0 - 356,0400,0 - 401,0450,0 - 451,1
500550560
500,0 - 501,1550,0 - 551,2560,0 - 561,2
600630650
600,0 - 601,2630,0 - 631,2650,0 - 651,2
710750800
710,0 - 711,6750,0 - 751,6800,0 - 801,6
850900950
850,0 - 851,6900,0 - 902,0950,0 - 952,0
100010501100
1000,0 - 1002,01050,0 - 1052,51100,0 - 1102,5
112011501200
1120,0 - 1122,51150,0 - 1152,51200,0 - 1202,5
125013001350
1250,0 - 1252,51300,0 - 1302,51350,0 - 1352,5
140014501500
1400,0 - 1402,51450,0 - 1452,81500,0 - 1502,9
160018002000
1600,0 - 1603,11800,0 - 1803,32000,0 - 2003,5
23002500
2300,0 - 2304,02500,0 - 2505,0
Ducts: Fittings:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
According to EN 1506 According to EN 1506
5
iL
D
D
L
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Sheet Metal Grade: Material:
Fittings and ducts in the standard DVAC range aremade from hot dip galvanized steel sheet with a yieldpoint in tension of 200 N/nm and a zinc coating shall
2
at least comply with Z 275.
Surface treatment of class Z 275 means 275g zinc/m ,2
double sided. Z 275 thus specifies the total amountof zinc on both sides of a 1m sheet.
2
The thickness can thus be calculated as follows:
Sheet Metal Thicknesses
Other thicknesses of sheet metal can be suppliedby DVAC. You will have to expect some changesto the product range, however.
For example, an increase in thickness in the ductsof 0.5mm means the internal diameter fails by 1.0mmwhich means in turn that standard fittings do not fit,and will have to be specially made for these ducts.
* The following material is used by DVACin the standard range:
* Ducts and hand made fittings are made with material toEN 10142 - Fe PO2 G Z 275 MA-C
* Pressed fittings are made with material toEN 10142 - Fe PO2 G Z 275 MA-C andEN 10142 - Fe PO6 G Z 275 MB-C
Other materials can also be supplied, for example:
to EN 14436 or AISI 316* Stainless steelor EN 1.4301 or AISI 304.Some fittings which are normally pressed have to behand made and swaged together.
* Aluminum to ISO/DIS 209-1.Some fittings which are normally pressed have to behand made and swaged together.
* Plastic coated products:Ducts made from “Plastisol” as standard, i.e. hot dipgalvanized steel sheet Z 275 with an internal andexternal coating, 100μm thick of polyvinyl chloride (PVC).
Fittings are made, as standard, from hot dip galvanizedsteel sheet Z 275 and then powder coated internallyand externally with a mixed powder consisting of epoxyand polyester (PE) to a thickness of 80μm.
Ducts can also be supplied with an optional coatingof epoxy +PE. This can be done either both internallyand externally, or only on the inside or outside.Powder-coated ducts eliminate the risk of differingshades in color between ducts and fittings.
Standard colors are white NCS S0502-Y30 gloss unitaccording to Gardner 60 & brown NCS S7010-Y70R
o
45 gloss units.
For ducts of Φ<100, the maximum lengthNOTE:is 1.5m for internal coating.
Fittings can optionally be coated on only the insideor outside. Powder coating can be optionally obtainedin thicknesses of up to 200μm.
with surface treatment to AZ 185 means 185g* Aluzinkaluzink/m double sided.
2
Some fittings which are normally pressed have to befabricated and swaged together.
Zinc Thickness =
Zinc weight
no. of sides x zinc density
=0,275
2.7140* 10 = 19μm
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* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
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Materials
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Temperature limits for our materials:
The shadow fields denotes standard versions.
Product Material/type
Operation
Continual Intermittent
Temperature limit
minoC
maxoC
minoC
maxoC
Pressed and seams welded
Galvanized steel sheet metal 2001
2502
Aluminum sheet metal 2003
300
Stainless sheet metal 500 700
PVC coated sheet steel metal 80 120
PE-/EP coated products 150 200
Swaged, spot welded and/orblind interlocked joint
Aluzink sheet metal 315
Mastic -40 70
Safe gasket and damperblade seal
EPDM rubber -30 100 -50 120
Silicone rubber -70 150 -90 200
Foam rubber seal EPDM rubber -30 100 -50 120
Foam plastic gasket Polyester -40 70
Damper shaft bearingPolyamide -30 150 -50 200
Brass 300
Damper actuatorElectric -30 50
Pneumatic -5 60
Duct filter Polyester 120
Drain hoseEthylene vinyl acetate andpolyethylene
-45 65
InsulationGlass wool 200
Rock wool 700
Silencer Polyester 130 180
1 Discoloration occurs at about 200 C in galvanized steel. This is mostly an appearance problem and does not meano
impaired corrosion protection in a normal environment.
2 If temperature rises to about 200 C, the adhesion of the zinc is impaired which means poorer corrosion protection.o
3 Aluminum sheet will soften after a couple of years at 200 C°
ML = 150 - 200 Co o
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
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Materials
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Units
The SI System (Système International d’Unités) is used in this catalogue in accordance with internationalpractice. Units may be given in the “technical system” in diagrams and tables, in parallel with the SI System.
Some Basic units
For Length metre m
For Mass kilogramme kg
For Time second s
For Electric Current ampere A
For Temperature kelvin K
Some Derived units
For Frequency hertz Hz 1 Hz = 1/s
For Force newton N 1 N = 1 kg*m/s2
For Pressure, Mechanical stress pascal Pa 1 Pa = 1 N/m2
For Energy, work joule J 1 J = 1N*m
For Power watt W 1 W = 1J/s
For Electric Potential, Electric tension volt V 1 V = 1 W/A
Some Additional units
For Timeminutehour
minh
1 min = 60 s1 h = 3600s = 60min
For Flat Angles degreeo
1 = 1/360 of a circleo
For Volume litre l 1 l = 1 000 cm = 1dm3 3
Some Multiple prefixes
Index Designation Des. Example
1012
tera T 1 terajoule 1 TJ
109
giga G 1 gigawatt 1 GW
106
mega M 1 megavolt 1 MV
103
kilo k 1 kilometre 1 km
102
hecto h 1 hectogramme 1 hg
101
deca da 1 decalumen 1 dalm
10-1
deci d 1 decimetre 1 dm
10-2
centi cm 1 centimetre 1 cm
10-3
milli m 1 milligramme 1 mg
10-6
micro μ 1 micrometre 1 μm
10-9
nano n 1 nanohenry 1 nH
10-12
pico p 1 picofarad 1 pF
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
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The SI System
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Conversion factors
Tables for conversion to other dimensions are given for some of the units commonly used in the industry.
Pressure, p
PapascalN/m
2
mm wcmm Aqmm H 02
mm Hg(at 20 C)
o
in wg“ wgin wc
psi(g)ibf/in
2bar
19,79
133249
6 895100 000
0,1021
13,625,4
70410 215
0,007 530,073 711,87
51,9753
0,004 020,039 40,5341
27,7402
0,000 1450,001 420,019 30,036 11
14,5
0,000 010 00,000 097 90,001 330,002 490,068 91
Length, l
ininch
ftfoot
ydyard
mmetre
mile
112,036,039,4
63 360
0,083 313,003,28
5 280
0,027 80,33311,09
1 760
0,025 40,3050,9141
1 609
0,000 015 80,000 1890,000 5680,000 6211
Area, A
in2
sq inft
2
sq ftyd
2
sq ydm
2
sq metrear
hahectare
1144
1 2961 550
155 00015 500 031
0,006 9419,00
10,81 076
107 639
0,000 7720,11111,20
12011 960
0,000 6450,092 90,8361
10010 000
0,000 006 450,000 9290,008 360,011
100
0,000 000 064 50,000 009 290,000 083 60,000 1000,010 01
Volume, V
in3
cu inl
litreUS galgallon
UK galgallon
ft3
cu ftyd
3
cu yardm
3
cubic metre
161,0
231277
1 72846 65661 024
0,016 413,794,55
28,3765
1 000
0,004 330,26411,207,48
202264
0,003 600,2200,83316,23
168220
0,000 5790,035 30,1340,1611
27,035,3
0,000 021 40,001 310,004 950,005 950,037 011,31
0,000 016 40,001 000,003 790,004 550,028 30,7651
Velocity, v
ft/minfpm
km/hBz
ft/smile/hour
mphknotkn
m/s
154,760,088,0
101197
0,018 311,101,611,853,60
0,016 70,91111,471,693,28
0,011 40,6210,68211,152,24
0,009 870,5400,5920,86911,94
0,005 080,2780,3050,4470,5141
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
9
The SI System
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Conversion factors
Volume flow, qv
ft /h3
cfhl/min m /h
3 ft /min3
cfml/s m /s
3
12,12
35,360,0
127127 133
0,4721
16,728,360
60 000
0,028 30,06011,703,6
3 600
0,016 70,035 30,58912,12
2 119
0,007 870,016 70,2780,4721
1 000
0,000 007 870,000 016 70,000 2780,000 4720,001 001
Mass, m
ozounce
lbpound
kgkilogramme
116,035,3
0,062 512,20
0,028 30,4541
Mass flow, qm
lb/min kg/s
1132
0,007 561
Density, ρ
kg/m3
lb/ft3
g /cm3
lb/in3
116.0
1 00027 680
0,062 41
62,41 728
0,001 000,016 01
27,7
0,000 036 10,000 5790,036 11
Force, F
Nnewton
lbfpound-force
kpkilopound
14,459,81
0,22512,20
0,1020,4541
Torque, M
lbf.in Nm lbf.ft kpm
18,85
12,086,8
0,11311,369,81
0,083 30,73817,23
0,011 50,1020,1381
Energy, work, E
Jjoule
Nm, Ws
BtuBritish thermal unit
kcalkilocalorie
kWh
11 0554 187
3 600 000
0,000 94813,97
3 412
0,000 2390,2521
860
0,000 000 2780,000 2930,001 161
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
10
The SI System
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Power, P
Btu/hW
wattNm/s, J/s kcal/h
hkmetric
horsepower
hpUK, US
horsepower
13,413,97
2 5102 544
0,29311,16
735746
0,2520,8601
632641
0,000 3980,000 360,001 5811,01
0,000 3930,001 340,001 560,9861
Temperature difference, temperature change, ;Δ for K Δ ϑ for CTo
Kkelvin
oF
degree Fahrenheit
oC
degree Celcius
10,5561,00
1,8011,80
1,000,5561
Associated temperatures
KoF
oC Physical state
0,00255273293311373
-4600,00
32,068,0
100212
-273-17,8
0,0020,037,8
100
Absolute zeroMixture of sal-ammoniac and snowMelting point of iceStandard atmospheric temperatureNormal temperature of human bodyBoiling point of water
Conversion between temperatureso o oC = ( F - 32) x 5/9 C = K - 273,15
F = C x 9/5 + 32 K = C + 273,15o o o
Greek letters
Greek letters are used in technical and scientific text to denote physical units.Minor variations in the shapes of the letters can be tolerated, on condition that this does not causeany risk of confusion.
Name Lower case Upper case Name Lower case Upper case
alphabetagammadeltaepsilonzetaetathetaiotakappalambdamy
αβγδεζηϑικλμ
ΑΒΓΔΕΖΗθΙΚΛΜ
nyksiomikronpirosigmatauypsilonfikipsiomega
νξοπρστυφχψω
ΝΞΟΠΡΣΤΥΦΧΨΩ
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
Conversion factors
11
The SI System
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Total Pressure =
Dynamic Pressure + Static Pressure
The Static Pressure in the atmosphere varieswith the weather - high pressure or low pressure -and with the height above sea level.The standard pressure, atmospheric pressure atsea level is:
101,3 kPa = 1,013 bar = 1013 mbar(= 1 atm = 760mm Hg)
At one particular point, such as in a ventilation duct,the static pressure comes from all sides.
In a ventilation system, the static pressure is relatedto the ambient atmospheric pressure outside theduct system; the static pressure can thus be positive- higher than ambient atmospheric, or negative -lower than ambient atmospheric pressure.
1 m2
101,3 kN
H
L
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
12
Pressure
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
Pressure dropIf you produce a static pressure difference in an openduct system, you can get the air to flow from a pointof higher pressure to a point of lower pressure - fromthe atmosphere via the inlet grating to the suction sideof the fan, and from the supply side of the fan via thesupply terminals back to the atmosphere.The pressure difference is converted into kinetic energy.
Dynamic Pressure is a measure of the kinetic energyof the moving air. The connection between pressureand energy is easy to see if you use SI system units.
Pa = N/m² = Nm³ = J/m³ i.e. energy (in J) per unitvolume (in m³) of the flowing air.
The dynamic pressure depends on:
p = . with the unitsd ρ v
2
v
2
_ 2_ 2
kg m kg m² kgm m
m³ s m³ s² s² m³����2
= = = N1 N
m² m²= = Pa.
Flow in a duct system is normally not free of loss.Friction losses occur and the air is forced to changedirection. It requires pressure (i.e. energy) to manageboth dynamic and static pressure - the sum of thesetwo is referred to as total pressure.
p = + pt s dρ
Since p will be negative in relation to atmospherics
pressure (on the suction side of the fan), this meansthat p will also be negative if the total of p and pt s d
is negative.
Pressure drop and flow lossesIn a ventilation system, you want to get air moving!Clean air is to be supplied to the occupancy zone andpolluted air must leave the room, process or machine.Energy is needed to move the air, which is added viathe fan, which gets the air moving.
In order to flow through a duct system, air has toovercome two types of flow resistance or pressure drops:
between the flowing air and the duct walls.* friction losswhen the air changes direction or speed.* single loss
(also known as the R value) is expressedFriction Loss
PS
Pd
in the unit Pa/m p =Δ ρf
where
p = friction loss per metre (Pa/m)Δ f
= friction factor related to duct material and surfaceλroughnessd = hydraulic diameter of the duct, the diameter ofh
a circular duct which gives the same friction pressure dropat the same flow velocity as a rectangular duct
2 * a * ba + b
where a and b are the duct sidesFor a circular duct, d = dh
= air density (kg/m )ρ3
= average velocity of air (m/s)v
dh =
13
Pressure
. . .
v
2
v
2
_ 2_ 2λ
dh.
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
Pressure drop calculation.
Fan Pressure Capacity Required
Let us do a pressure drop calculation for a simpleduct system!
• Number the fittings, in the directionof air flow.
• Then put the dimension and dataof each component in a tableas in the example.
• Read the pressure drop fromthe graph for each component.You can follow this example fromthe reduced scale graphs below.
No Flowl/s
ComponentDenom.
DimensionΦ mm
Lengthm
PressuredropPa/m
PressuredropPa
1 500 RCCLL 500-315 4,5
2 500 BFL45O
315 4,0
3 500 SR 315 1.2 1,5 1,8
4 500 BFL45O
315 4,0
5 500 SR 315 2,2 1,5 3,3
6 500 BFL90O
315 8,0
7 500 SR 250 7,5 1,5 11,3
8 500 BFL90O
250 8,0
9 500 SR 250 2,5 1,5 3,8
10 500 RCLL 315-250 11,0
11 500 SR 315 2 5 10,0
Total pressure drop (sum of rows 1 -11) = 69,6
Add up the pressure drops on the far right of the table.Then select a suitable fan which gives the required flowq= 500 l/s and a total pressure rise of p = 125 Pa.t
14
11
9
10
8
5
76
4
32
1
RCLL• BFL45°•
BFL90°• • SR
Pressure
100
5
10
50
Pre
ssure
dro
p D
pt
100-8
0125-1
00
160-1
25
200-1
60
250-2
00
315-2
50
400-3
15
500-4
00
630-5
00
800-6
30
1000-8
00
1250-1
000Velo
city
in b
ig e
nd
v [m
/s]
3
2
4
5
6789
[Pa]
Dimension øø
[mm]
DD
12
1
5010 100 500 1000 5000 10000 [l/s]
50 100 500 1000 5000 10000 [m³/h]
Flow q
500 1000 5000 10000
100 500 1000 5000 10000 [l/s]
[m³/h]
Flow q
0.5
1
10
50 250 315 400 500 630
Pre
ssure
dro
ppt [P
a]
Δ
1000
800
1250
5
1000
500 1000 5000 10000
100 500 1000 5000 10000
5
10
50
100
[l/s]
[m /h]³
Flow q
250 315 400 500 630
800
1250
Pre
ssure
dro
ppt [P
a]
Δ
1
Dimension ød [mm]
Vel
ocity
v [m
/s] 63
8010
012
516
020
025
031
540
050
063
080
010
001250
2015
10
54
3
2
200
100
50
10
5
1
0.5
0.1
0.05
0.02
[Pa/m]
5 10 50 500 1000 500010000 50000
Specifi
c p
ressure
dro
pΔ
pt
1000005000010000500010001005010
100 [I/s]
[m³/h]
5
6
78910
15
100
5
10
50
[Pa]
Pre
ssure
dro
p D
pt
Velo
city
in s
mall
end
v [m
/s]
125-8
0160-1
00
200-1
25
315-2
00
400-2
50
500-3
15
630-4
00
800-5
00
250-1
60
1000-6
30
1250-8
00
Dimension øø
[mm]
DD
12
1
5010 100 500 1000 5000 10000 [l/s]
[m /h]³50 100 500 1000 5000 10000
Flow q
1 sdimension step•
RCLL•
2 sdimension step•
8
4
1.5
4.5
11
Flow q Flow q
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Prerequisites
In order to correctly dimension a duct system, you needinformation about the total pressure drops of the fittings.
The total pressure drop p (Pa) between two sections,Δ t
1 and 2, in a duct system is defined by:
p = p - p = (p +p ) - (p +p )t t1 t2 s1 d1 s2 d2
Ac1
1V
s1p
Ac2
2V
s2p
where p =d ρ * v / 2 and = q / A2
v c
It is assumed in pressure drop calculation of ventilationducts that:
• incompressible flow, i.e. air density does not change,
• isothermal relationship, i.e. no exchange of heatbetween the duct and its surroundings occurs,
• no changes in potential energy, i.e. height differencesbetween the various sections of the duct systemare neglected.
The total pressure drops for the most common fittingsare shown in graphs, as a function of air flow(or velocity in some cases).
The basic data for the graphs comes from measurementsand calculations done at our laboratories.Some graphs are taken from litterature.
The graphs apply to air under standard conditions.
V = 15,1 · 10 m /s-6 2
= 20°Cϑ= 1,2kg/mρ
3
= 65%φpA = 1013,2 mbar
ρFor air of other density ( ) the flow (q )other other_density
is obtained from the formula
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel :
- Aluminum Metal:
(Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
(Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
15
Pressure
Section 1 Section 2
Designations used
labrd
dh
AcPAPsPd
PtΔPΔPtϑv
qραφ
λRζv
= length= long side= short side= radius= diameter
= hydraulic diameter= cross sectional area= atmospheric pressure= static pressure= dynamic pressure
= total pressure= pressure drop= total pressure drop= temperature= air velocity (average)
= air flow= density= angle= relative humidity
= friction number= coefficient of friction= resistance number= kinematic viscosity
m (mm)m (mm)m (mm)m (mm)m (mm)
m (mm)m
2
mbarPaPa
PaPaPaoC
m/s
m³/skg/m³°%
Pa/m
m²/s
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
Spiral Tube
16
Dimension ø[mm]
D
Vel
ocity
v [m
/s]
63
80
100
125
160
200
250
315
400
500
630
800
1000
1250
20
15
10
5
4
3
2
200
100
50
10
5
1
0.5
0.1
0.05
0.02
[Pa/m]
5 10 50 500 1000 5000 10000 50000
Specifi
c p
ressure
dro
pΔ
pt
1000005000010000500010001005010
Flow q
100 [I/s]
[m³/h]
100
5
10
50
Pre
ssure
dro
p D
pt
100-8
0125-1
00
160-1
25
200-1
60
250-2
00
315-2
50
400-3
15
500-4
00
630-5
00
800-6
30
1000-8
00
1250-1
000Velo
city
in b
ig e
nd
v [m
/s]
3
2
4
5
6789
[Pa]
Dimension øø
[mm]
DD
1
2
15010 100 500 1000 5000 10000 [l/s]
50 100 500 1000 5000 10000 [m³/h]
Flow q
Technical Data•
RCLL•
Technical Data•
SR•
Concentric Reducer
1 sdimension step•
D
1D
L
D2
Pressure Drop Diagram
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
17
R=D
10 50 100 500 1000 3000
50 100 500 1000 5000 10000
[l/s]
[m /h]³
63 80 100 125 160 200
0 2.
0 5.
01
10
20
Flow q
Pre
ssure
dro
ppt
[Pa]
Δ
Dimension ø [mm]D
5
Bend °- ockseamed15 L
BFL15°•
Technical Data•
Technical Data•
Concentric Reducer
Bend °- ockseamed30 L
10
500 1000 5000 10000
100 500 1000 5000 10000 [l/s]
[m³/h]
Flow q
0 3.
0 5.
1
5
30 250 315 400 500 630
Dimension ø [mm]D
Pre
ssure
dro
ppt [P
a]
Δ
1000
800
1250
Technical Data•
R=D
BFL30°•
5
6
78910
15
100
5
10
50
[Pa]
Pre
ssu
re d
rop
D
pt
Velo
city
in s
mall
end
v [m
/s]
125-8
0160-1
00
200-1
25
315-2
00
400-2
50
500-3
15
630-4
00
800-5
00
250-1
60
1000-6
30
1250-8
00
Dimension øø
[mm]
DD1
2
1
5010 100 500 1000 5000 10000 [l/s]
[m /h]³50 100 500 1000 5000 10000
Flow q
RCLL•
2 sdimension step•
D
D
1D 2D
L
Pressure Drop Diagram
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
18
Bend °- ockseamed60 L
BFL45°•
Bend °- ockseamed90 L
0.5
1
10
50 250 315 400 500 630
Dimension ø [mm]D
Pre
ssu
re d
rop
pt
[Pa
]Δ
1000
800
1250
Technical Data•
5R=D
Bend °- ockseamed45 L
5
10
50
0 7.
1
70 250 315 400 500 630
Dimension ø [mm]D
1000
800
1250
Pre
ssure
dro
ppt
[Pa]
Δ
Technical Data•
BFL60°•
R=D
Technical Data•
BFL90°•
1000
500 1000 5000 10000
100 500 1000 5000 10000
5
10
50
100
[l/s]
[m /h]³Flow q
250 315 400 500 630
800
1250
Pre
ssure
dro
ppt [P
a]
Δ
Dimension ø [mm]D
1
R=D
500 1000 5000 10000 [m /h]³Flow q
500 1000 5000 10000 [m /h]³Flow q
100 500 1000 5000 10000 [l/s]
100 500 1000 5000 10000 [l/s]
D
D
D
Pressure Drop Diagram
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
19
METHOD OF INSTALLATION - SPIRAL
1
2
4 3
7 6
5 8
Installation ofSlip Joint Connector
Screw or RivetPlacement Sequence
Installation of Pipe and Fittings
Single Wall – Slip Fit
The fittings are male sized to slip into the pipe section.
A good tight fit is necessary for minimizing friction loss
and good sealing.
Care should be taken during handling to avoid any dents
or distortions that can cause improper fit and difficult installation.
Steps to be followed:
1. Bring the bottom of the fitting collar into the Inner Spiral
Duct at a slight angle.
2. Work the rest of the Collar into the Spiral Duct.
3. When the Inner Collar is fully inserted, start the Outer Collar
in the same way.
4. Carefully work the rest of the Collar into the Spiral Duct
until approximate 20mm of the collar, that remains exposed
between the end of the Spiral Duct and the stop bead of the
fitting collar.
Do not use a screwdriver or knife to help make the connection.
Apply pressure with the heal of your hand or with your fist
to help slip the fitting into the Duct.
5. Apply Duct sealer to this exposed area.
6. Push the fitting into the Spiral Duct until the stop bead meets
the edge of the Spiral Duct.
7. Fasten the fitting into the Spiral Duct with screws or rivets
as per the chart at right. The screws or rivets should be
evenly spaced around the perimeter of the connection,
approximate 15mm back from the stop bead. Placement
of the screws or rivets should be opposite to each other
as demonstrated in the diagram.
Method of Installation - Spiral Ducts
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
20
Dimensions and Wall Thickness
ΦD, D , D , D , D1 2 3 4
nom(mm)
Circumferenceπd(m)
Circumferenceπd(m)
Li
nom(mm)
Materials Thickness (mm)
GI S 304, 316SS 304, 316S AL
100 0.314 50 0.6 0.6 1.0
125 0.393 50 0.6 0.6 1.0
140 0.440 50 0.6 0.6 1.0
150 0.471 50 0.6 0.6 1.0
160 0.503 50 0.6 0.6 1.0
180 0.565 50 0.6 0.6 1.0
200 0.628 50 0.6 0.6 1.0
224 0.704 50 0.6 0.6 1.0
250 0.785 50 0.6 0.6 1.0
280 0.880 50 0.7 0.7 1.0
300 0.942 50 0.7 0.7 1.0
315 0.990 50 0.7 0.7 1.0
355 1.115 50 0.7 0.7 1.0
400 1.257 50 0.8 0.8 1.0
450 1.414 50 0.8 0.8 1.2
500 1.571 50 0.8 0.8 1.2
550 1.728 50 0.8 0.8 1.2
560 1.759 50 0.8 0.8 1.2
600 1.885 50 0.8 0.8 1.2
630 1.979 50 1.0 1.0 1.2
650 2.042 50 1.0 1.0 1.2
710 2.231 50 1.0 1.0 1.5
750 2.356 50 1.0 1.0 1.5
800 2.513 50 1.0 1.0 1.5
850 2.670 50 1.0 1.0 1.5
900 2.827 50 1.0 1.0 1.5
950 2.985 50 1.0 1.0 2.0
1000 3.142 50 1.0 1.0 2.0
1050 3.299 50 1.0 1.0 2.0
1100 3.456 50 1.0 1.0 2.0
1120 3.519 50 1.2 1.2 2.0
1150 3.613 50 1.2 1.2 2.0
1200 3.770 50 1.2 1.2 2.0
1250 3.927 50 1.2 1.2 2.0
1300 4.084 50 1.2 1.2 2.0
1350 4.241 50 1.2 1.2 2.0
1400 4.398 100 1.2 1.2 2.0
Wall Thickness ScheduleCircular Fittings Duct
• Standard Seam: Stitch WeldedStandard Seam for Aluminum:• CLINCH
• To ± 10 in. wg (Galvanized)• To ± 10 in. wg (Stainless Steel 304, 316)• To ± 2 in. wg (Aluminum)
With Outturned Stiffening Corrugation
iLiL
1D2D
L
Li
iL
D
1D
2D
3D
iL
iL L1 2L
Thickness Schedule (For Fittings)
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.4/3.8- SMACNA (3rd Edition-2005) See Page 3.5/3.9
As per:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
Spiral Tube• Standard Length: 3000mm
e:Custom Lengths Availabl• To ± 10 in. wg (Galvanized)• To ± 10 in. wg (Stainless Steel 304, 316)• To ± 2 in. wg (Aluminum)
* With Outturned Stiffening CorrugationAbove THK 1.5mm
Dimensions and Wall Thickness
StandardDiameter
(mm)
StandardDiameter
(mm)
Circumferenceπd(m)
Circumferenceπd(m)
Areaπd /4
2
(m )2
Areaπd /4
2
(m )2
Materials Thickness (mm) StandardLength(mm)
StandardLength(mm)GI S 304, 316SS 304, 316S AL
100 0.314 0.008 0.5 0.5 1.0 3000
125 0.393 0.012 0.5 0.5 1.0 3000
140 0.440 0.015 0.5 0.5 1.0 3000
150 0.471 0.018 0.5 0.5 1.0 3000
160 0.503 0.020 0.5 0.5 1.0 3000
180 0.565 0.025 0.5 0.5 1.0 3000
200 0.628 0.031 0.5 0.5 1.0 3000
224 0.704 0.039 0.5 0.5 1.0 3000
250 0.785 0.049 0.5 0.5 1.0 3000
280 0.880 0.062 0.6 0.6 1.0 3000
300* 0.942 0.071 0.6 0.6 1.0 3000
315* 0.990 0.078 0.6 0.6 1.0 3000
355* 1.115 0.099 0.6 0.6 1.0 3000
400* 1.257 0.126 0.7 0.7 1.0 3000
450* 1.414 0.159 0.7 0.7 1.0 3000
500* 1.571 0.196 0.7 0.7 1.0 3000
550* 1.728 0.238 0.7 0.7 1.0 3000
560* 1.759 0.246 0.7 0.7 1.0 3000
600* 1.885 0.283 0.7 0.7 1.0 3000
630* 1.979 0.312 0.8 0.8 1.0 3000
650* 2.042 0.332 0.8 0.8 1.0 3000
710* 2.231 0.392 0.8 0.8 1.2 3000
750* 2.356 0.442 0.8 0.8 1.2 3000
800* 2.513 0.503 0.8 0.8 1.2 3000
850* 2.670 0.567 0.8 0.8 1.2 3000
900* 2.827 0.636 0.8 0.8 1.2 3000
950* 2.985 0.709 0.8 0.8 1.2 3000
1000* 3.142 0.785 0.8 0.8 1.5 3000
1050* 3.299 0.866 0.8 0.8 1.5 3000
1100* 3.456 0.950 0.8 0.8 1.5 3000
1120* 3.519 0.985 1.0 1.0 1.5 3000
1150* 3.613 1.039 1.0 1.0 1.5 3000
1200* 3.770 1.131 1.0 1.0 1.5 3000
1250* 3.927 1.227 1.0 1.0 1.5 3000
1300* 4.084 1.327 1.0 1.0 2.0 3000
1350* 4.241 1.431 1.0 1.0 2.0 3000
1400* 4.398 1.539 1.0 1.0 2.0 3000
1450* 4.555 1.651 1.2 1.2 2.0 3000
1500* 4.712 1.767 1.2 1.2 2.0 3000
1600* 5.027 2.011 1.2 1.2 2.0 3000
1800* 5.655 2.545 1.2 1.2 2.0 3000
2000* 6.283 3.142 1.2 1.2 2.0 3000
2300* 7.226 4.155 1.5N.A. N.A.
3000
2500* 7.854 4.909 2.0 3000
GI SR 200
MaterialCodeDimension D
Ordering example:
* With Outturned Stiffening Corrugation
21
D
D*
D*
L
L
L
DVAC Standard Specifications - Spiral Tube
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
As per:
CSD•
• L: Standard Length 1220 mm• To ± 10 in. wg (Galvanized)• To ± 10 in. wg (Stainless Steel 304, 316)• To ± 2 in. wg (Aluminum)
Circular Straight Duct - Grooved Seam
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
22
- SMACNA (2nd Edition-1995) See Page 3.4/3.8- SMACNA (3rd Edition-2005) See Page 3.5/3.9
Dimensions and Wall Thickness
StandardDiameter
(mm)
StandardDiameter
(mm)
Circumferenceπd(m)
Circumferenceπd(m)
Areaπd /4
2
(m )2
Areaπd /4
2
(m )2
Li
nom(mm)
Materials Thickness (mm)
GI S 304, 316SS 304, 316S AL
100 0.314 0.008 50 0.6 0.6 1.0
125 0.393 0.012 50 0.6 0.6 1.0
140 0.440 0.015 50 0.6 0.6 1.0
150 0.471 0.018 50 0.6 0.6 1.0
160 0.503 0.020 50 0.6 0.6 1.0
180 0.565 0.025 50 0.6 0.6 1.0
200 0.628 0.031 50 0.6 0.6 1.0
224 0.704 0.039 50 0.6 0.6 1.0
250 0.785 0.049 50 0.6 0.6 1.0
280 0.880 0.062 50 0.7 0.7 1.0
300 0.942 0.071 50 0.7 0.7 1.0
315 0.990 0.078 50 0.7 0.7 1.0
355 1.115 0.099 50 0.7 0.7 1.0
400 1.257 0.126 50 0.8 0.8 1.0
450 1.414 0.159 50 0.8 0.8 1.2
500 1.571 0.196 50 0.8 0.8 1.2
550 1.728 0.238 50 0.8 0.8 1.2
560 1.759 0.246 50 0.8 0.8 1.2
600 1.885 0.283 50 0.8 0.8 1.2
630 1.979 0.312 50 1.0 1.0 1.2
650 2.042 0.332 50 1.0 1.0 1.2
710 2.231 0.392 50 1.0 1.0 1.5
750 2.356 0.442 50 1.0 1.0 1.5
800 2.513 0.503 50 1.0 1.0 1.5
850 2.670 0.567 50 1.0 1.0 1.5
900 2.827 0.636 50 1.0 1.0 1.5
950 2.985 0.709 50 1.0 1.0 2.0
1000 3.142 0.785 50 1.0 1.0 2.0
1050 3.299 0.866 50 1.0 1.0 2.0
1100 3.456 0.950 50 1.0 1.0 2.0
1120 3.519 0.985 50 1.2 1.2 2.0
1150 3.613 1.039 50 1.2 1.2 2.0
1200 3.770 1.131 50 1.2 1.2 2.0
1250 3.927 1.227 50 1.2 1.2 2.0
1300 4.084 1.327 50 1.2 1.2 2.0
1350 4.241 1.431 50 1.2 1.2 2.0
1400 4.398 1.539 100 1.2 1.2 2.0
With Outturned Stiffening Corrugation
D
iL iL
L
DVAC Standard Specifications - Grooved Seam
Circular Ducts: (Single Wall)
GI CSD 200
MaterialCodeDimension D
Ordering example:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Concentric Reducer
Eccentric Reducer
GI CLL 200 150
MaterialCodeDimension D1
Dimension D2
Ordering example
Circular Straight Duct - Stitch Welded Seam
Reducing Segmented Bend
GI RSB 200 150
MaterialCodeDimension D1
Dimension D2
Ordering example
Bend °- ockseamed15 L
R=D
Bend °- ockseamed22.5 L
GI BFL 20022.5°
R=D
GI CSDS 200
MaterialCodeDimension D
Ordering exampleGI RCLL 200 150
MaterialCodeDimension D1
Dimension D2
Ordering example
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
GI BFL15° 200
MaterialCodeDimension D
Ordering example:
MaterialCodeDimension D
Ordering example:
23
• RCLLL = D - D1 2•
• Minimum Length 100mm, Maximum Length 400mm
• CLL• L = D - D1 2
• Minimum Length 100mm, Maximum Length 400mm
• CSDS• L: Standard Length: 1220 mm
• BFL15°• Standard 2-Gore
• BFL22.5°• Standard 2-Gore
C
E
A
D
F
B
• RSB
D
L
1D 2D
L
1D2D
L
1D
2D
DD
Fittings
- SMACNA (2nd Edition-1995) See Page 3.4/3.8- SMACNA (3rd Edition-2005) See Page 3.5/3.9
As per:
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.1- SMACNA (3rd Edition-2005) See Page 3.1
As per:
Bend 90°- ockseamedL
GI BFL 20090°
MaterialCodeDimension D
Ordering example
Bend °- ockseamed60 L
GI BFL 20060°
MaterialCodeDimension D
Ordering example
Bend °- ockseamed45 L
GI BFL45 200°
MaterialCodeDimension D
Ordering example
Bend °- ockseamed30 L
GI BFL 20030°
MaterialCodeDimension D
Ordering example
R=D
R=DR=D
R=D
Metered Elbows
Duct Velocity
R/D Ratio Number of Mitered Pieces
Centerline Radiusto Duct DiameterCenterline Radiusto Duct Diameter
90°9 60° 45°45
Up to 1000 fpm (5mps) 0.6 4 3 3
1001 to 1500 fpm (5 to 7.5mps) 1.0 4 3 3
above 1500 fpm (7.5mps) 1.5 5 4 3
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
24
• BFL90°• Standard 4-Gore
• BFL60°• Standard 3-Gore
• BFL45°• Standard 3-Gore
• °BFL30• Standard 2 -Gore
I
G
J
H
D D
DD
Fittings
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Twin Segment Bend
GI TSB 200 150 150MaterialCodeDimension D1
Dimension D2
Dimension D3
Ordering example
2 Segment Bend 90°
GI 2SB90° 200
MaterialCodeDimension D
Ordering example
Bend 90° Lockseamed with Branch
GI 200 150BFLB90°
MaterialCodeDimension D1
Dimension D2
Ordering example
Circular Offset
GI CO 200 300 500
MaterialCodeDimension DOffset OFFLength L
Ordering example
Centric Tee Piece
GI TCL 200 150
MaterialCodeDimension D1
Dimension D2
Ordering example
Centric Cross Tee Piece
D2
100 to 650mm
BL
50mm
710 to 1400mm 100mm
D & D2 3
100 to 650mm
BL
50mm
710 to 1400mm 100mm
GI XCL 200 100 100
MaterialCodeDimension D1
Dimension D2
Dimension D3
Ordering example
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
25
• TCL• L = D +100mm2
• XCLL = the longer of D or D +100mm2 3•
M
O
K
N
P
L
• TSB • 2SB90°
• BFLB90° • CO
D
1D
2D
D
L
OFF
1D
2D
L
1D
2D
3D
L
1D
D32D
Fittings
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Centric Tee Piece 45°
GI TCL 200 15045°
MaterialCodeDimension D1
Dimension D2
Ordering example
D2
100 to 250mm
BL
50mm
280 to 355mm 75mm
400 to 650mm 100mm
710 to 1400mm 150mm
Centric Cross T- Piece 45°
GI TCCL 200 150 15045°
MaterialCodeDimension D1
Dimension D2
Dimension D3
Ordering example
D & D2 3
100 to 250mm
BL
50mm
280 to 355mm 75mm
400 to 650mm 100mm
710 to 1400mm 150mm
Reducing Tee 45°
L
Reducing Cross Tee 45°
GI RCT 200 150 150 15045°
MaterialCodeDimension D1
Dimension D2
Dimension D3
Dimension D4
Ordering example
GI RT 200 150 15045°
MaterialCodeDimension D1
Dimension D2
Dimension D3
Ordering example
Shoe Tee - Offset
45°
GI STO 200 150
MaterialCodeDimension D1
Dimension D2
Ordering example
D2
100 to 200mm
BL
100mm
225 to 355mm 175mm
400 to 650mm 250mm
710 to 1400mm 300mm
Y - Tee
GI TY 45 200°
MaterialCodeDegreeDimension D1
Ordering example
D2
100 to 250mm
BL
50mm
280 to 355mm 75mm
400 to 650mm 100mm
710 to 1400mm 150mm
D & D2 3
100 to 250mm
BL
50mm
280 to 355mm 75mm
400 to 650mm 100mm
710 to 1400mm 150mm
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
26
• TCL45°• L = D x1.5 +100mm2
• TCCL45°L = the longer of D or D x1.5 +100mm2 3•
• RT45°• L = D x1.5 +100mm2
• RCT45°L = the longer of D or D x1.5 +100mm2 3•
• STOL = D + BL + 100mm2•
• TY45°30 ,• ° ° °45 and 60 available
• D = D = D1 2 3
S
U
Q
T
V
R
75mm
50mm
1D
2D
3D
2D
3D1D
L
75mm
50mm
1D
75mm
50mm
4D
3D
2D
2D 3D
1D
50mm
50mm
L
1D
2D
1D
2D
L
Fittings
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Centric Tee Piece with Reducer
GI 200 150 100TCPL
MaterialCodeDimension D1
Dimension D2
Dimension D3
Ordering example
D2
100 to 650mm
BL
50mm
710 to 1400mm 100mm
Conical Tee
GI TC 200 150
MaterialCodeDimension D1
Dimension D2
Ordering example
Rectangular Shoe with Pipe
45°
GI RSWP 200 300X150
MaterialCodeDim. DDim. Width x Depth
Ordering exampleGI RCSWP 200 300X150 300X150
MaterialCodeDim. DDim. Width x Depth1 1
Dim. Width x Depth2 2
Ordering example
45°
L
Rectangular Cross Shoe with Pipe
Rectangular Shoe on Pipe
• RSP• L =Width + 100mm
GI RSP 200 300X150
MaterialCodeDiameter PipeDim. Width x Depth
Ordering example
45°
Circular Shoe on Flat
GI CSF 200
MaterialCodeDimension D
Ordering example
BL
45°
D
100 to 200mm
L
+75mm
224 to 355mm +100mm
400 to 650mm +125mm
710 to 1400mm +150mm
BL
75mm
100mm
125mm
150mm
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
27
• TCPLL =D +150mm1 2•
• L =D - D2 1 3
• Minimum L 100mm, Maximum L2 400mm2
• TCL = D + 150mm2•
• RSWPL =Width + 200mm•
• RCSWPL = the longer of Width or Width + 200mm1 2•
Y
AA
W
Z
AB
X
CSF•
3D1D
2D
1L 2L
1D
L
2D
+ 50mmD2
L
150mm
50mm
Width
D
50mm
50mm
Width1
Width2
D
150mm
150mm
Width
L
D
50mm
D2
100 to 200mm
BL
150mm
224 to 400mm 200mm
450 to 650mm 250mm
710 to 1400mm 300mmBL
Fittings
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Collar Saddle Branch 90°
6Branch 0° Branch 45°
GI CS 200 200
MaterialCodeDimension D2
Diameter Pipe D1
Ordering example
GI B 200 20090°
MaterialCodeDimension D2
Diameter Pipe D1
Ordering example
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
28
GI B 200 20045°
MaterialCodeDimension D2
Diameter Pipe D1
Ordering example
GI B 200 20060°
MaterialCodeDimension D2
Diameter Pipe D1
Ordering example
AG AH
AC AD
AE AF
0°9• BCS•
°45• B0°6• B
2D
1D 1D
2D
1D
2D2D
1D
Circular Shoe on Pipe
GI CSP 200 200
MaterialCodeDimension D2
Diameter Pipe D1
Ordering example
CSP•
BL
D2
100 to 200mm
BL
100mm
224 to 355mm 175mm
400 to 650mm 250mm
710 to 1400mm 300mm
1D
Conical Branch on Pipe
GI CBP 200 200
MaterialCodeDimension D2
Diameter Pipe D1
Ordering example
CBP•
D2
100 to 200mm
BL
150mm
224 to 400mm 200mm
450 to 650mm 250mm
710 to 1400mm 300mm
BL
15°
1D
45°
Fittings
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.9- SMACNA (3rd Edition-2005) See Page 3.3/3.4
As per:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
29
End Cap Tube (Male)
GI 200ECM
MaterialCodeDimension D
Ordering example
End Cap Fittings (Female)
GI F 200EC
MaterialCodeDimension D
Ordering example
Coupling Pipe
GI C 200M
MaterialCodeDimension D
Ordering example
upling FittingCo
GI FC 200
MaterialCodeDimension D
Ordering example
AI AJ
AK AL
ECF•ECM•
FC•MC•
120mm
D
120mm
D
60mm
D
60mm
D
Fittings
Circular Ducts: (Single Wall)
t
b
D1D1
Bolts b x t
Dim. N mm
Up to 125 M6 4 25x3
150 to 250 M6 6 30x3
280 to 355 M8 8 40x4
400 to 500 M8 12 40x4
550 to 710 M10 16 40x5
750 to 1400 M10 24 50x5
Circular Flat Flange
GI CFF 200
MaterialCodeDimension D1
Ordering example
• CFF• D = D + b2 1
AM AN
1D
2D
t
b
D1D1
Bolts b x b x t
Dim. N mm
Up to 125 M6 4 25x25x3
150 to 250 M6 6 30x30x3
280 to 355 M8 8 40x40x4
400 to 500 M8 12 40x40x4
550 to 710 M10 16 40x40x5
750 to 1400 M10 24 50x50x5
Circular FlangeAngle
GI CAF 200
MaterialCodeDimension D1
Ordering example
• CFF• D = D + b2 1
1D
2D
b
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
30
AQ
AO
AP
GI CWC 200
MaterialCodeDimension D
Ordering example
• CWC• L = D +100mm• H = as per Air Flow
L
150mm
H
40mm
40mm
D
Birdmesh
Rain Cowl
• RC• L = D +200mm• H = D/41
• H = D/22
H1
L
H2
D
GI RC 200
MaterialCodeDimension D
Ordering example
Birdmesh
1D
Drain
Birdmesh
1D
2D
1 + 40mmD
Jet owlC
• JC• L = D x21
• D = D x1.52 1
GI JC 200
MaterialCodeDimension D
Ordering example
L
Side Discharge Terminal
• SDT
AR
D Birdmesh
GI SDT 200
MaterialCodeDimension D
Ordering example
Accessories
45.0
Circular Ducts: (Single Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 4.8/4.9- SMACNA (3rd Edition-2005) See Page 5.9/5.10
As per:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
Strap Hangers for Circular Ducts
DVAC Standard 30X3mm
Dia. Maximum Spacing WireDia.WireDia.
Rod Strap
10 in. dn250mm dn10 in. dn250mm dn
12 ft3.7m12 ft3.7m
One 12 gaOne 2.75mmOne 12 gaOne 2.75mm
¼ in.6.4mm¼ in.6.4mm
1 in. x 22ga25.4 x 0.85mm1 in. x 22ga25.4 x 0.85mm
11-18 in.460mm11-18 in.460mm
12 ft3.7m12 ft3.7m
Two 12 ga or One 8 gaOne 4.27mmTwo 12 ga or One 8 gaOne 4.27mm
¼ in.6.4mm¼ in.6.4mm
1 in. x 22ga25.4 x 0.85mm1 in. x 22ga25.4 x 0.85mm
19-24 in.610mm19-24 in.610mm
12 ft3.7m12 ft3.7m
Two 10 gaTwo 3.51mmTwo 10 gaTwo 3.51mm
¼ in.6.4mm¼ in.6.4mm
1 in. x 22ga25.4 x 0.85mm1 in. x 22ga25.4 x 0.85mm
25-36 in900mm25-36 in900mm
12 ft3.7m12 ft3.7m
Two 8 gaTwo 2.7mmTwo 8 gaTwo 2.7mm
⅜ in.9.5mm⅜ in.9.5mm
1 in. x 20ga25.4 x 1.00mm1 in. x 20ga25.4 x 1.00mm
37-50 in1270mm37-50 in1270mm
12 ft3.7m12 ft3.7m
Two ⅜ in.Two 9.5mmTwo ⅜ in.Two 9.5mm
Two 1 in. x 20ga(2) 25.4 x 1.00mmTwo 1 in. x 20ga(2) 25.4 x 1.00mm
51-60 in1520mm51-60 in1520mm
12 ft3.7m12 ft3.7m
Two ⅜ in.Two 9.5mmTwo ⅜ in.Two 9.5mm
Two 1 in. x 18ga(2) 25.4 x 1.31mmTwo 1 in. x 18ga(2) 25.4 x 1.31mm
61-84 in.2130mm61-84 in.2130mm
12 ft3.7m12 ft3.7m
Two ⅜ in.Two 9.5mmTwo ⅜ in.Two 9.5mm
Two 1 in. x 16ga(2) 25.4 x 1.61mmTwo 1 in. x 16ga(2) 25.4 x 1.61mm
85-96 in.2400mm85-96 in.2400mm
12 ft3.7m12 ft3.7m
Two ½ in.Two 12mmTwo ½ in.Two 12mm
Two 1 in. x 16ga½(2) 38 x 1.61mmTwo 1 in. x 16ga½(2) 38 x 1.61mm
Minimum Hanger Sizes for Round Duct
HANGER
HANGER RODS,WIRES
OR STRAPS
HANGER RODS,WIRES
OR STRAPS
GALVANIZED STRAP30x3mmGALVANIZED STRAP30x3mm
SCREW 10mm
BAND ONE HALF-ROUND MAY BE USEDIF DUCT SHAPE IS MAINTAINEDBAND ONE HALF-ROUND MAY BE USEDIF DUCT SHAPE IS MAINTAINED
HANGERS MUST NOT DEFORM DUCT SHAPE
HANGER
LOAD RATEDFASTENERLOAD RATEDFASTENER
BAND OF SAME SIZEAS HANGER STRAPBAND OF SAME SIZEAS HANGER STRAP
31
Duct Support
Circular Ducts:
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
32
Method of Installation - Spiral
Circular Ducts: (Double Wall)
1
2
4 3
7 6
5 8
Installation ofSlip Joint Connector
Screw or RivetPlacement Sequence
Installation of Pipe and Fittings
Double Wall – Slip Fit
The Inner and Outer Collars of DVAC Fittings are sized
to slip into Spiral Ducts.
The Inner Collar fits beyond the outer collar. This permits the
Inner collar to be inserted into the Inner liner of the Spiral Duct;
A similar technique is applied to the single wall.
A tight fit is necessary to minimize friction loss and to promote
proper sealing.
Care should be taken during the handling and installation to avoid
dents and distortions that can case improper fit or difficult installation.
Steps to be followed:
1. Bring the bottom of the Inner fitting collar into the Inner Spiral
Duct at a slight angle.
2. Work the rest of the Inner Collar into the Spiral Duct.
3. When the Inner Collar is fully inserted, start the Outer Collar in
the same way.
4. Carefully work the rest of the Collar into the Spiral Duct
until approximate 20mm of the collar, that remains exposed
between the end of the Spiral Duct and the stop bead of the
fitting collar.
Do not use a screwdriver or knife to help make the connection.
Apply pressure with the heal of your hand or with your fist
to help slip the fitting into the Duct.
5. Apply Duct sealer to this exposed area.
6. Push the fitting into the Spiral Duct until the stop bead meets
the edge of the Spiral Duct.
7. Fasten the fitting into the Spiral Duct with screws or rivets
as per the chart at right. The screws or rivets should be evenly spaced
around the perimeter of the connection, approximate 15mm back
from the stop bead. Placement of the screws or rivets should be
opposite to each other as demonstrated in the diagram.
METHOD OF INSTALLATION - SPIRAL
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
33
Thickness Schedule (For Fittings)
Circular Ducts: (Double Wall)
Wall Thickness ScheduleCircular Fittings Duct
• Standard Seam: Stitch WeldedStandard Seam for Aluminum:• CLINCH
• To ± 10 in. wg (Galvanized)• To ± 10 in. wg (Stainless Steel 304, 316)• To ± 2 in. wg (Aluminum)
With Outturned Stiffening Corrugation
iLLi
L
Li
iL
iL
iL L1 2L
D12D
D
D3D1
D3
Li Li
iL
iL
iLiL
iL
Dimensions and Wall Thickness - (Double Wall)Dimensions and Wall Thickness
StandardDiameter
(mm)
StandardDiameter
(mm)
Li
nom(mm)
Materials Thickness (mm)
GI S 304, 316SS 304, 316S AL
Inner Dia. / Outer Diam.Inner Dia. / Outer Diam. Inner Dia. / Outer Dia.Inner Dia. / Outer Dia. Inner Dia. / Outer Dia. Inner Dia. / Outer Dia.Inner Dia. / Outer Dia.
100 / 150 or 200 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
125 / 180 or 224 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
140 / 200 or 250 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
150 / 200 or 250 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
160 / 200 or 250 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
180 / 224 or 280 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
200 / 250 or 300 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
224 / 280 or 315 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
250 / 300 or 355 50 0.6 / 0.7 0.6 / 0.7 1.0 / 1.0
280 / 355 or 400 50 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0
300* / 355* or 400* 50 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0
315* / 355* or 400* 50 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0
355* / 400* or 450* 50 0.7 / 0.8 0.7 / 0.8 1.0 / 1.0
400* / 450* or 500 50 0.8 / 0.8 0.8 / 0.8 1.0 / 1.2
450* / 500* or 550* 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
500* / 550* or 600 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
550* / 600* or 650* 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
560* / 600* or 650* 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
600* / 650* or 710 50 0.8 / 1.0 0.8 / 1.0 1.2 / 1.2
630* / 710* or 750* 50 1.0 / 1.0 1.0 / 1.0 1.2 / 1.2
650* / 710* or 750 50 1.0 / 1.0 1.0 / 1.0 1.2 / 1.5
710* / 750* or 800* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
750* / 800* or 850* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
800* / 850* or 900* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
850* / 900* or 950* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
900* / 950* or 1000* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 2.0
950* / 1000* or 1050* 50 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0
1000* / 1050* or 1100* 50 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0
1050* / 1100* or 1150* 50 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0
1100* / 1150* or 1200* 50 1.0 / 1.2 1.0 / 1.2 2.0 / 2.0
1120* / 1200* or 1250* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1150* / 1200* or 1250* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1200* / 1250* or 1300* 50 1.0 / 1.0 1.2 / 1.2 2.0 / 2.0
1250* / 1300* or 1350* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1300* / 1350* or 1400* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1350* / 1400* or 1450* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1400* / 1450* or 1500* 100 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.4/3.8- SMACNA (3rd Edition-2005) See Page 3.5/3.9
As per:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
34
DVAC Standard Specifications - Spiral Tube
Circular Ducts: (Double Wall)
Spiral Tube• Standard Length: 3000mm
e:Custom Lengths Availabl• To ± 10 in. wg (Galvanized)• To ± 10 in. wg (Stainless Steel 304, 316)• To ± 2 in. wg (Aluminum)
* With Outturned Stiffening CorrugationAbove THK 1.5mm
Dimensions and Wall Thickness - (Double Wall)Dimensions and Wall Thickness
StandardDiameter
(mm)
StandardDiameter
(mm)
Materials Thickness (mm) StandardLength(mm)
StandardLength(mm)GI S 304, 316SS 304, 316S AL
Inner Dia. / Outer Diam.Inner Dia. / Outer Diam. Inner Dia. / Outer Dia.Inner Dia. / Outer Dia. Inner Dia. / Outer Dia. Inner Dia. / Outer Dia.
100 / 150 or 200 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
125 / 180 or 224 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
140 / 200 or 250 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
150 / 200 or 250 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
160 / 200 or 250 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
180 / 224 or 280 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
200 / 250 or 300 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
224 / 280 or 315 0.5 / 0.5 0.5 / 0.5 1.0 / 1.0 3000
250 / 300 or 355 0.5 / 0.6 0.5 / 0.6 1.0 / 1.0 3000
280 / 355 or 400 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0 3000
300* / 355* or 400* 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0 3000
315* / 355* or 400* 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0 3000
355* / 400* or 450* 0.6 / 0.7 0.6 / 0.7 1.0 / 1.0 3000
400* / 450* or 500 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0 3000
450* / 500* or 550* 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0 3000
500* / 550* or 600 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0 3000
550* / 600* or 650* 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0 3000
560* / 600* or 650* 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0 3000
600* / 650* or 710 0.7 / 0.8 0.7 / 0.8 1.0 / 1.0 3000
630* / 710* or 750* 0.8 / 0.8 0.8 / 0.8 1.0 / 1.0 3000
650* / 710* or 750 0.8 / 0.8 0.8 / 0.8 1.0 / 1.2 3000
710* / 750* or 800* 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2 3000
750* / 800* or 850* 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2 3000
800* / 850* or 900* 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2 3000
850* / 900* or 950* 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2 3000
900* / 950* or 1000* 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2 3000
950* / 1000* or 1050* 0.8 / 0.8 0.8 / 0.8 1.2 / 1.5 3000
1000* / 1050* or 1100* 0.8 / 0.8 0.8 / 0.8 1.5 / 1.5 3000
1050* / 1100* or 1150* 0.8 / 0.8 0.8 / 0.8 1.5 / 1.5 3000
1100* / 1150* or 1200* 0.8 / 1.0 0.8 / 1.0 1.5 / 1.5 3000
1120* / 1200* or 1250* 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5 3000
1150* / 1200* or 1250* 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5 3000
1200* / 1250* or 1300* 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5 3000
1250* / 1300* or 1350* 1.0 / 1.0 1.0 / 1.0 1.5 / 2.0 3000
1300* / 1350* or 1400* 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0 3000
1350* / 1400* or 1450* 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0 3000
1400* / 1450* or 1500* 1.0 / 1.2 1.0 / 1.2 2.0 / 2.0 3000
* With Outturned Stiffening Corrugation
L
L
L
D*
D*
D
GI DW25 SR 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
OuterDia.
InnerDia.
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
As per:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
35
- SMACNA (2nd Edition-1995) See Page 3.4/3.8- SMACNA (3rd Edition-2005) See Page 3.5/3.9
DVAC Standard Specifications - Grooved Seam
Circular Ducts: (Double Wall)
CSD•
• L: Standard Length 1220 mm• To ± 10 in. wg (Galvanized)• To ± 10 in. wg (Stainless Steel 304, 316)• To ± 2 in. wg (Aluminum)
Circular Straight Duct - Grooved Seam
With Outturned Stiffening Corrugation
iL iL
L
D
GI DW25 CSD 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
Dimensions and Wall Thickness - (Double Wall)Dimensions and Wall Thickness
StandardDiameter
(mm)
StandardDiameter
(mm)
Li
nom(mm)
Materials Thickness (mm)
GI S 304, 316SS 304, 316S AL
Inner Dia. / Outer Diam. Inner Dia. / Outer Dia. Inner Dia. / Outer Dia.Inner Dia. / Outer Dia. Inner Dia. / Outer Dia.
100 / 150 or 200 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
125 / 180 or 224 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
140 / 200 or 250 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
150 / 200 or 250 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
160 / 200 or 250 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
180 / 224 or 280 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
200 / 250 or 300 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
224 / 280 or 315 50 0.6 / 0.6 0.6 / 0.6 1.0 / 1.0
250 / 300 or 355 50 0.6 / 0.7 0.6 / 0.7 1.0 / 1.0
280 / 355 or 400 50 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0
300* / 355* or 400* 50 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0
315* / 355* or 400* 50 0.7 / 0.7 0.7 / 0.7 1.0 / 1.0
355* / 400* or 450* 50 0.7 / 0.8 0.7 / 0.8 1.0 / 1.0
400* / 450* or 500 50 0.8 / 0.8 0.8 / 0.8 1.0 / 1.2
450* / 500* or 550* 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
500* / 550* or 600 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
550* / 600* or 650* 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
560* / 600* or 650* 50 0.8 / 0.8 0.8 / 0.8 1.2 / 1.2
600* / 650* or 710 50 0.8 / 1.0 0.8 / 1.0 1.2 / 1.2
630* / 710* or 750* 50 1.0 / 1.0 1.0 / 1.0 1.2 / 1.2
650* / 710* or 750 50 1.0 / 1.0 1.0 / 1.0 1.2 / 1.5
710* / 750* or 800* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
750* / 800* or 850* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
800* / 850* or 900* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
850* / 900* or 950* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 1.5
900* / 950* or 1000* 50 1.0 / 1.0 1.0 / 1.0 1.5 / 2.0
950* / 1000* or 1050* 50 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0
1000* / 1050* or 1100* 50 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0
1050* / 1100* or 1150* 50 1.0 / 1.0 1.0 / 1.0 2.0 / 2.0
1100* / 1150* or 1200* 50 1.0 / 1.2 1.0 / 1.2 2.0 / 2.0
1120* / 1200* or 1250* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1150* / 1200* or 1250* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1200* / 1250* or 1300* 50 1.0 / 1.0 1.2 / 1.2 2.0 / 2.0
1250* / 1300* or 1350* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1300* / 1350* or 1400* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1350* / 1400* or 1450* 50 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
1400* / 1450* or 1500* 100 1.2 / 1.2 1.2 / 1.2 2.0 / 2.0
OuterDia.
InnerDia.
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
Concentric Reducer
Eccentric Reducer
- SMACNA (2nd Edition-1995) See Page 3.8/3.11- SMACNA (3rd Edition-2005) See Page 3.5/3.30
As per:
Circular Straight Duct - Stitch Welded Seam
L
Reducing Segmented Bend
Bend °- ockseamed15 L
R=D
Bend °- ockseamed22.5 L
R=D
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
36
• RCLLL = D - D1 2•
• Minimum Length 100mm, Maximum Length 400mm
• CLL• L = D - D1 2
• Minimum Length 100mm, Maximum Length 400mm
• CSDS• L: Standard Length: 1220 mm
• BFL15°• Standard 2-Gore
• BFL22.5°• Standard 2-Gore
C
E
A
D
F
B
• RSB
1D 2D
L
2D
1D2D
1D
L
D D
D
GI DW25 BFL22.5 200 GI°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering exampleGI DW25 BFL15 200 GI°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
GI DW25 CLL 200 150 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering exampleGI DW25 RSB 200 150 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering example
GI DW25 RCLL 200 150 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering example
GI DW25 CSDS 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
Fittings
Circular Ducts: (Double Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.1- SMACNA (3rd Edition-2005) See Page 3.1
As per:
Bend 90°- ockseamedLBend °- ockseamed60 L
Bend °- ockseamed45 LBend °- ockseamed30 L
R=D
R=DR=D
R=D
Metered Elbows
Duct Velocity
R/D Ratio Number of Mitered Pieces
Centerline Radiusto Duct DiameterCenterline Radiusto Duct Diameter
90°9 60° 45°45
Up to 1000 fpm (5mps) 0.6 4 3 3
1001 to 1500 fpm (5 to 7.5mps) 1.0 4 3 3
above 1500 fpm (7.5mps) 1.5 5 4 3
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
37
• BFL90°• Standard 4-Gore
• BFL60°• Standard 3-Gore
• BFL45°• Standard 3-Gore
• °BFL30• Standard 2-Gore
I
G
J
H
D D
DD
GI DW25 BFL45 200 GI°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering exampleGI DW25 BFL3 200 GI0°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
GI DW25 BFL 200 GI90°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering exampleGI DW25 BFL6 200 GI0°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
Fittings
Circular Ducts: (Double Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Twin Segment Bend 2 Segment Bend 90°
Bend 90° Lockseamed with Branch Circular Offset
Centric Tee Piece Centric Cross Tee Piece
D2
100 to 650mm
BL
100mm
710 to 1400mm 150mm
D & D2 3
100 to 650mm
BL
100mm
710 to 1400mm 150mm
GI DW25 XCL 200 100 100 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Dimension D3
Inner Material
Ordering example
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
38
• TCL• L = D +150mm2
• XCLL = the longer of D or D +150mm2 3•
M
O
K
N
P
L
• TSB • 2SB90°
• BFLB90° • CO
OFF
L
L
D1
D2
D2 D3
D1
D
D2
D
D1
D2
D1
3D
BLBL
GI DW25 200 100 GIBFLB90°
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering example GI DW25 CO 200 300 500 GI
Outer MaterialInsulation THKCodeDimension DOffset OffLength LInner Material
Ordering example
GI DW25 TSB 200 100 100 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Dimension D3
Inner Material
Ordering example
GI DW25 2S 200 GIB90°
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
GI DW25 TCL 200 150 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering example
L
Fittings
Circular Ducts: (Double Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Centric Tee Piece 45°
D2
100 to 250mm
BL
100mm
280 to 355mm 125mm
400 to 650mm 150mm
710 to 1400mm 200mm
Centric Cross T- Piece 45°
D & D2 3
100 to 250mm
BL
100mm
280 to 355mm 125mm
400 to 650mm 150mm
710 to 1400mm 200mm
Reducing Tee 45° Reducing Cross Tee 45°
Shoe Tee - Offset
45°
D2
100 to 200mm
BL
150mm
225 to 355mm 225mm
400 to 650mm 300mm
710 to 1400mm 350mm
Y - Tee
D2
100 to 250mm
BL
100mm
280 to 355mm 125mm
400 to 650mm 150mm
710 to 1400mm 200mm
D & D2 3
100 to 250mm
BL
100mm
280 to 355mm 125mm
400 to 650mm 150mm
710 to 1400mm 200mm
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
39
• TCL45°• L = D x1.5 +150mm2
• TCCL45°L = the longer of D or D x1.5 +150mm2 3•
• RT45°• L = D x1.5 +150mm2
• RCT45°L = the longer of D or D x1.5 +150mm2 3•
• STOL = D + BL + 150mm2•
• TY45°30 ,• ° ° °45 and 60 available
• D = D = D1 2 3
S
U
Q
T
V
R
L
50mm
L
50mm
50mm
50mm
L
50mm
D1
2D 3D
D1
D2
D1 D3
2D
L
50mmD1 4D
2D
3D
BL BL
BL
BL
BL
BL
BL
D1
2D 2D
3D
D1
75mm
75mm
75mm 75
mm
GI DW25 TCL 200 100 GI45°
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering example GI DW25 TCCL 200 100 100 GI45°
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Dimension D3
Inner Material
Ordering example
GI DW25 200 150 150 GIRT45°
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Dimension D3
Inner Material
Ordering example
GI DW25 T 200 GIY 45°
Outer MaterialInsulation THKCodeDegreeDimension D1
Inner Material
Ordering example
GI DW25 200 150 150 150 GIRCT45°
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Dimension D3
4Dimension DInner Material
Ordering example
GI DW25 STO 200 100 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering example
Fittings
Circular Ducts: (Double Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Centric Tee Piece with Reducer
D2
100 to 650mm
BL
100mm
710 to 1400mm 150mm
Conical Tee
Rectangular Shoe with Pipe
45°
45°
L
Rectangular Cross Shoe with Pipe
Rectangular Shoe on Pipe
• RSP• L =Width + 150mm
45°
Circular Shoe on Flat
45°D
100 to 200mm
L
+125mm
224 to 355mm +150mm
400 to 650mm +175mm
710 to 1400mm +200mm
BL
125mm
150mm
175mm
200mm
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
40
• TCPLL =D +150mm1 2•
• L =D - D2 1 3
• Minimum L 100mm, Maximum L 400mm2 2
• TCL = D + 150mm2•
• RSWPL =Width + 2 0mm• 5
• RCSWPL = the longer of Width or Width + 2 0mm1 2• 5
Y
AA
W
Z
AB
X
CSF•
1L 2L
L
D2 +100mm
L
200mm
50mm
Width
50mm
50mm
Width1
Width2
200mm
200mm
Width
50mm
D
D1
D1
3D
D2
D2
D
GI DW25 TC 200 150 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Inner Material
Ordering exampleGI DW25 TCPL 200 150 100 GI
Outer MaterialInsulation THKCodeDimension D1
Dimension D2
Dimension D3
Inner Material
Ordering example
GI DW25 RCSWP 200 300X150 300X150 GI
Outer MaterialInsulation THKCodeDimension DDimension Width x Depth1 1
Dimension Width x Depth2 2
Inner Material
Ordering example
GI DW25 RSWP 200 300X150 GI
Outer MaterialInsulation THKCodeDimension DDimension Width x Depth
Inner Material
Ordering example
GI DW25 RSP 200 300X150 GI
Outer MaterialInsulation THKCodeDiameter PipeDimension Width x Depth
Inner Material
Ordering example
GI DW25 CSF 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
BL
D2
100 to 200mm
BL
150mm
224 to 400mm 200mm
450 to 650mm 250mm
710 to 1400mm 300mm
Fittings
Circular Ducts: (Double Wall)
L
D
BL
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.11/3.12- SMACNA (3rd Edition-2005) See Page 3.30/3.31
As per:
Collar Saddle Branch 90°
6Branch 0° Branch 45°
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
41
AG AH
AC AD
AE AF
0°9• BCS•
°45• B0°6• B
Circular Shoe on Pipe
CSP•
BL
D2
100 to 200mm
BL
100mm
224 to 355mm 175mm
400 to 650mm 250mm
710 to 1400mm 300mm
Conical Branch on Pipe
CBP•
D2
100 to 200mm
BL
150mm
224 to 400mm 200mm
450 to 650mm 250mm
710 to 1400mm 300mm
BL
15°45°
D1
D2
D1
2D
2D
1D
2D
1D
D2
1D
D2
1D
GI DW25 B 200 200 GI90°
Outer MaterialInsulation THKCodeDimension D2
Diameter Pipe D1
Inner Material
Ordering example
GI DW25 B 200 200 GI45°
Outer MaterialInsulation THKCodeDimension D2
Diameter Pipe D1
Inner Material
Ordering exampleGI DW25 B 200 200 GI60°
Outer MaterialInsulation THKCodeDimension D2
Diameter Pipe D1
Inner Material
Ordering example
GI DW25 CS 200 200 GI
Outer MaterialInsulation THKCodeDimension D2
Diameter Pipe D1
Inner Material
Ordering example
GI DW25 CSP 200 200 GI
Outer MaterialInsulation THKCodeDimension D2
Diameter Pipe D1
Inner Material
Ordering exampleGI DW25 CBP 200 200 GI
Outer MaterialInsulation THKCodeDimension D2
Diameter Pipe D1
Inner Material
Ordering example
Fittings
Circular Ducts: (Double Wall)
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)
DOHA- QATAR - PHONE: +974-44500118 - +974-44500119 - FAX: +974-44500117
- SMACNA (2nd Edition-1995) See Page 3.9- SMACNA (3rd Edition-2005) See Page 3.3
As per:
* Materials Used for Ductworks :-Galvanized Steel: (Standard) L.F.Q. Complying with ASTM A653 and Having G90 Coating Designation.
- Stainless Steel : (Optional) Complying with ASTM A240M / A480M, Grade 304, 304L, 316 & 316L.
- Aluminum Metal: (Optional) Complying with ASTM B209, Alloy 3003, Temper H14.
42
End Cap Tube (Male) End Cap Fittings (Female)
Coupling Pipe upling FittingCo
AI AJ
AK AL
ECF•ECM•
FC•MC•
120mm
120mm
60mm
60mm
D D
D D
GI DW25 ECM 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering exampleGI DW25 ECF 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
GI DW25 MC 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering exampleGI DW25 FC 200 GI
Outer MaterialInsulation THKCodeDimension DInner Material
Ordering example
Fittings
Circular Ducts: (Double Wall)
t
b
D1D1
Bolts b x t
Dim. N mm
Up to 125 M6 4 25x3
150 to 250 M6 6 30x3
280 to 355 M8 8 40x4
400 to 500 M8 12 40x4
550 to 710 M10 16 40x5
750 to 1400 M10 24 50x5
Circular Flat Flange
GI CFF 200
MaterialCodeDimension D1
Ordering example
• CFF• D = D + b2 1
AM AN
1D
2D
t
b
D1D1
Bolts b x b x t
Dim. N mm
Up to 125 M6 4 25x25x3
150 to 250 M6 6 30x30x3
280 to 355 M8 8 40x40x4
400 to 500 M8 12 40x40x4
550 to 710 M10 16 40x40x5
750 to 1400 M10 24 50x50x5
Circular FlangeAngle
GI CAF 200
MaterialCodeDimension D1
Ordering example
• CFF• D = D + b2 1
1D
2D
b
Small Industries Zone - Pink AreaZone 81 - Street 13 - Bldg. 57
Tel: +974 445 00 118 - 445 00 119Fax: +974 445 00 117P.O. Box: 55619 - Doha, State Of Qatar
Email: [email protected]: www.dvac-duct.com
DUCT VENTILATION AIR CONDITIONING Co. (W.L.L.)