Sealmatic Presentation API 682 4th Edition

API 682 4th Edition Application Guide

Sealmatic India Pvt. Ltd.

Content

Objectives And Category Details A comprehensive overview on the basic features

Categories, Arrangements, Configurations Seal Types & Spring Positions

Basic seal classification parameters, their defaults, options and relations

Seal Selection By Media GroupsSeal classification parameters and typical service conditions of Non-Hydrocarbons,Non-flashing and Flashing Hydrocarbons

Seal Coding System API seal code and example

Product Locator

Sealmatic mechanical seals and seal supply systems, referring to the seal classification parameters and piping plansof the standard

API Piping Plans With short specifications of all piping plans, symbol library

Selection Of Barrier/Buffer Media For contacting wet dual seals

API 682 4th EditionThis presentation provides basic information about API 682 4th edition. It contains a set of charts and summaries that give a brief overview and represent a step-by-step method to specify and select suitable Sealmatic sealing systems.

API 682 is a standard of the American Petroleum Institute. The charts, summaries and piping plans in this presentation are based on that standard. For further and more detailed information, please refer to the commercially available documents of API 682.

Though defaults and options for several design details are specified by API, options are only permitted with the approval of the customer. The standard does not prevent a vendor from offering or the customer from requesting alternative equipment or engineered products for special applications. This may be particularly appropriate where there are innovative or developing designs and materials.

API 682 4th Edition Category 1

Objectives (4.2)

Operation of seal cartridge Continuously for 25,000 h without need for replacement

Operation of Arrangement 2 outer seal (e. g., containment seal)

At least 25,000 h without need for replacement at any containment seal chamber or buffer fluid pressure equal to or less than the seal leakage pressure setting (not to exceed a gauge pressure of 0.7 bar (10 PSI) and for at least 8 h at the seal chamber conditions).

EmissionsComplying with local emissions regulations or exhibiting a maximum screening value of 1,000 ml/m3 (1,000 ppm vol.) as measured by the EPA Method 21, whichever is more stringent.

Scope and basic design features

Pump shaft sizes (1) 20 … 110 mm (0.75" … 4.3")Seal design (4.1.3, 6.1.1.1) Balanced, internally-mounted, cartridge design, no hook sleeves allowed.

Materials

Seal faces (6.1.6.2.2/4, 6.1.6.2.3) One ring premium grade, blister-resistant carbon graphite (unless service requires two hard materials). One ring reaction-bonded or self-sintered silicon carbide.

Seal sleeves (6.1.6.3) Austenitic stainless steel type 316, 316L, 316TI or equivalent (unless otherwise specified). For alloy pumps in corrosive services same or better alloy as used for the pump casing.Gland plates (6.1.6.7)

Seal flushFlush connection for Arrangement 3 If specified (7.3.2.2)

Distributed flush system for Arrangement 1 and 2 If specified (6.2.1.2.1) or required by 6.1.2.14

DimensionsStandard seal sizes None

Seal chambers (4.1.2) ASME B73.1 and ASME B73.2

Operation limits (4.1.2)Temperature –40 °C … 260 °C (–40 °F … 500 °F)

Max. gauge pressure 20 bar (300 PSI)

BushingsArrangement 1 (7.1.2.1, 7.1.2.2)

Fixed carbon bushingOption: floating carbon bushing

Arrangement 2 and 3Option: fixed carbon bushing, if additional length is available

(7.2.2.1, 7.3.2.1)

Seal qualification test (I.3.5)Category 1 seal RequiredCategory 2 seal Applicable for same seal designCategory 3 seal Applicable for same seal design

Data requirements (Annex E) (7.1.2.8)

ProposalMinimal

ContractPerformance curve of internal

circulation device If specified

Objectives & Category Details


Objectives (4.2)


Operation of Arrangement 2 At least 25,000 h without need for replacement at any containment seal chamber or buffer fluid pressure equal to or less than the seal leakage pressure setting (not to exceed a gauge pressure of 0.7 bar (10 PSI) and for at least 8 h at the seal chamber conditions).outer seal (e. g., containment seal)




MaterialsSeal faces (6.1.6.2.2/4, 6.1.6.2.3) One ring premium grade, blister-resistant carbon graphite (unless service requires two

hard materials). One ring reaction-bonded or self-sintered silicon carbide.


Seal flushFlush connection for Arrangement 3 If specified (7.3.2.2)

Distributed flush system for Arrangement 1 and 2 Required (6.2.2.2.1, 6.2.3.2.1) except when piping plan 13 or 23 are specified.

DimensionsStandard seal sizes To fit shafts in even 10 mm increments (6.2.2.3.1)

Seal chambers (4.1.2) API 610




Floating carbon bushingOption: segmented carbon bushing (only if required)


(7.2.2.1, 7.3.2.1)

Seal qualification test (I.3.5)Category 1 seal –Category 2 seal RequiredCategory 3 seal Applicable for same seal design


ProposalMinimal


circulation device If specified



Objectives (4.2)


Operation of Arrangement 2 At least 25,000 h without need for replacement at any containment seal chamber or buffer fluid pressure equal to or less than the seal leakage pressure setting (not to exceed a gauge pressure of 0.7 bar (10 PSI) and for at least 8 h at the seal chamber conditions).outer seal (e. g., containment

seal)




MaterialsSeal faces (6.1.6.2.2/4, 6.1.6.2.3) One ring premium grade, blister-resistant carbon graphite (unless service requires two hard

materials). One ring reaction-bonded or self-sintered silicon carbide.


Seal flush

Flush connection for Arrangement 3 If specified (7.3.2.2)

Distributed flush system for Arrangement 1 and 2 Required (6.2.2.2.1, 6.2.3.2.1) except when piping plan 13 or 23 are specified.

DimensionsStandard seal sizes To fit shafts in even 10 mm increments (6.2.2.3.1)

Seal chambers (4.1.2) API 610




Floating carbon bushingOption: segmented carbon bushing (only if required)


(7.2.2.1, 7.3.2.1)

Seal qualification test (I.3.5)Category 1 seal –Category 2 seal –Category 3 seal Required


ProposalRigorous


circulation device Required


Categories, Arrangements, Configurations, Seal Types & Spring Positions

Category Arrangement Seal Type

A

Configuration

1CW-FX

1CW-FL

2CW-CW

2CW-CS Rotating

3CW-FB

3NC-BB

Spring Position

Contacting Wet – FiXed throttle bushing

Contacting Wet – Contacting Wet

Stationary

Stationary

2NC-CS

Rotating

3CW-BB

3CW-FF

3NC-FF

3NC-FB

Seal face surface speed< 23 m/s (75 ft/s)

Seal face surface speed> 23 m/s (75 ft/s)

Non-Contacting – Face-to-Face

Non-Contacting – Face-to-Back

Stationary

Single seal cartridge• Distributed flush system

Balanced pusher sealTemperature: –40 °C … 176 °C (–40 °F … 350 °F)Gauge pressure: 20 bar (300 PSI) / 40 bar (600 PSI) Multiple springs: Alloy C-276 or Alloy C-4

Single spring: SS 316O-Rings: FKM or FFKM

NBR, HNBR, EPM, EPDM, TFE …

Contacting Wet – FLoating throttle bushing

2

Dual seal cartridge p(buffer medium) < p(seal

chamber)

• Internal reverse balance feature

• Distributed flush system (if possible)

• Fixed carbon throttle bushing

BContacting Wet – Containment Seal(non-contacting or contacting CS )

Metal bellows seal with O-RingsTemperature: –40 °C … 176 °C (–40 °F … 350 °F)Gauge pressure: 20 bar (300 PSI)

Metal bellows: Alloy C-276, Alloy 718

O-Rings: FKM or FFKM

NBR, HNBR, EPM, EPDM, TFE …

Non-Contacting – Containment Seal(non-contacting or contacting CS )

3 CDual seal cartridgep(barrier medium) > p(seal

chamber)

• Internal reverse balancefeature

• Fixed carbon throttlebushing

• Flush connection to process side

Contacting Wet – Face-to-Back Metal bellows seal with flexible graphiteTemperature: –40 °C … 400 °C (–40 °F … 750 °F)

Gauge pressure: 20 bar (300 PSI) Metal bellows: Alloy 718 Secondary seal: Flexible graphite

Contacting Wet – Back-to-Back

Contacting Wet – Face-to-Face

Non-Contacting – Back-to-Back

ES

Totally engineered sealing systemTemperature: <–40 °C or > 260 °C

(<–40 °F or > 500 °F) (Category 1)<–40 °C or > 400 °C(<–40 °F or < 750 °F) (Category 2/3)

Gauge pressure: >20 bar (300 PSI) (Category 1)>40 bar (600 PSI) (Category 2/3)

Surface speed: >23 m/s (75 ft/s)Shaft diameter: <20 (0.75 inch) or >110 mm (4.3 inch)

Media:Highly corrosive fluids for which thespecified materials are not suitable,fluids with absolute vaporpressures>34 bar (493 PSI), unstable liquid properties (e. g. multiphase, non-Newtonian), high viscosity or pour point above or within 20 °C (36 °F) of minimum ambient temperature.

For Arrangement 2 and Arrangement 3 the seal types can be mixed across configurations (see note of 4.1.3)

Optional design featureDefault configuration Optional configuration

Rotating11 2 3

AS

ME

B73

.1,

AS

ME

B7

3.2

, A

PI

676

AP

I 61

0

–40

°C…

260

°C,2

0ba

r(–

40°F

…50

0°F

,290

PS

I)

–40

°C…

400

°C,4

0ba

r(–

40°F

…75

2°F

,580

PS

I)

Min

imal

data

requ

irem

ents

Rig

oro

usd

ata

req

uire

me

nts

Seal Selection By Media GroupsDefault Option, if specified

Not Applicable

Configuration

1CW

-FX

2CW

-CW

2N

C-C

S

3CW

-FB

3N

C-B

B

2C

W-C

S

2N

C-C

S

3C

W-B

B

3C

W-F

F

3N

C-F

B

3N

C-B

B

3NC

-FF

Flexible element rot. rot. rot. rot. rot. rot. stat. rot.stat.rot. rot. rot. stat. rot. stat. stat. rot. stat.

Mechanical seals

Temperature Pressure range<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■

20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■

<20 bar (290 PSI) □ □ ■ □ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■

20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■

<20 (300) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■

20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■

<20 bar (290 PSI) □ ■ ■ ■ □ □ ■ ■ □ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) □ □ ■ ■ □ ■ ■ ■ ■

<80ºC (176 ºF) <20 bar (290 PSI) □ □ ■ □ □ □ □ □ □ ■ ■ ■ ■ ■

<20 bar (290 PSI) □ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■

<20 bar (290 PSI) □ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■<20 bar (290 PSI) ES

1)ES

1)ES

1)ES

1)ES

1)ES

1)ES

1)ES

1)ES

1)ES

1)ES

1) ES ES ES

20…40 bar (290…580 PSI) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES ES

<20 bar (290 PSI)20…40 bar (290…580 PSI)<20 bar (290 PSI) □ ■ □ ■ ■ ■ ■ ■ ■ ■ □ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■<20 bar (290 PSI) □ ■ □ ■ ■ ■ ■ ■ ■ ■ □ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■

<20 bar (290 PSI) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES ES ES

20…40 bar (290…580 PSI) ES1)

ES1)

ES1)

ES1)

ES1)

ES1)

ES1) ES ES

<20 bar (290 PSI)20…40 bar (290…580 PSI)

1C

W-F

L

Arrangement

2 and 3

CT

X-A

PI-

DN

CT

X-A

PI-

SN

SB

-D

CT

X-A

PI-

DN

GS

PH

-KD

B75

0V

N

SB

B75

0V

K-T

a

176 ºC...260 ºC(349 ºF...500 ºF)

≥80ºC (176 ºF)

<80ºC (176 ºF)

<80ºC (176 ºF)

-40 ºC…-5 ºC(-40 ºF...23 ºF)

-5 ºC...176ºC(23 ºF...500 ºF)

176 ºC...260 ºC(349 ºF...500 ºF)

260 ºC...400 ºC(500 ºF...752 ºF)

Optional

Seal type

Engineered Seal (not required to meet design and testing requirements)

GS

PH

-Ta

GS

PH

-Ta

B75

0V

K-T

a

B75

0V

K-D

260 ºC...400 ºC(500 ºF...752 ºF)

No

n-f

lash

ing

H

ydro

carb

on

s

Seal type recommendation

Category

Fla

shin

gH

ydro

carb

on

s

Water

Sour water

Absolute vapourPressure less than1 bar (15 PSI ) at pumping temperature

(Refer to API 682 4th ed..Annex A,sheet 4)

Absolute vapourPressure above1 bar (15 PSI ) at pumping temperature


Sealmatic product information■ Suitable Sealmatic mechanical seal or applicable piping plan□ To be clarified with Sealmatic application expertES Engineered Seal based on reference type A,B or C,

ES1) Special feature: internal circulation device for plan 23, perfluoroelastomer secondary seals.

<80ºC (176 ºF)

-40 ºC…-5 ºC (-40 ºF...23 ºF)

-5 ºC...176ºC(23 ºF...500 ºF)

No

n-H

ydro

carb

on

s(r

efer

s to

AP

I 68

2 4t

h ed

, A

nnex

A,

shee

t 3)

Recommended standard seal

H2SO4 ≤ 20%, 25 ºC (77 ºF )H3SO4 ≤ 20%, 80 ºC (176 ºF )

Caustic, Amines, Crystalize

Media /Piping plan

A

B75

0V

K-G

SP

H

2CW

-CW

SB

-Ta

3CW

-FB

GS

PH

-KD

SB

-Ta

31 2 3 1 2

1

Seal Selection By Media GroupsDefault Option, if specified

Not Applicable

Configuration

1CW

-FL

2CW

-CW

3CW

-FB

3CW

-BB

3CW

-BB

3CW

-FF

Flexible element rot. rot. rot. rot. stat. rot. stat. rot. stat. rot. rot. stat.

Mechanical seals

Temperature Pressure range<20 bar (290 PSI) ■ ■ ■ ■

20…40 bar (290…580 PSI)

<20 bar (290 PSI) ES ES ES ES

20…40 bar (290…580 PSI)

<20 (300) ■ ■ ■ ■

20…40 bar (290…580 PSI)

<20 bar (290 PSI) □ ■ ■ ■20…40 bar (290…580 PSI)

<80ºC (176 ºF) <20 bar (290 PSI) □ □ □ □

<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■

20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ES ES ES ES ES ES ES ES ES ES ES ES20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ES ES ES ES ES ES ES ES20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■

20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES

Arrangement

2 and 3 2 and 3

UF

LW

T80

0-T

a

UF

L6

50-

Ta

UF

LW

T80

0-T

a

UF

L6

50-

Ta

UF

LW

T80

0-D

176 ºC...260 ºC(349 ºF...500 ºF)

≥80ºC (176 ºF)

<80ºC (176 ºF)

<80ºC (176 ºF)

-40 ºC…-5 ºC(-40 ºF...23 ºF)

-5 ºC...176ºC(23 ºF...500 ºF)

176 ºC...260 ºC(349 ºF...500 ºF)

260 ºC...400 ºC(500 ºF...752 ºF)

Optional

Seal type

Engineered Seal (not required to meet design and testing requirements)

260 ºC...400 ºC(500 ºF...752 ºF)

No

n-f

lash

ing

H

ydro

carb

on

s

Seal type recommendation

Category

Fla

shin

gH

ydro

carb

on

s

Water

Sour water

Absolute vapourPressure less than1 bar (15 PSI ) at pumping temperature


Absolute vapourPressure above1 bar (15 PSI ) at pumping temperature


Sealmatic product information■ Suitable Sealmatic mechanical seal or applicable piping plan□ To be clarified with Sealmatic application expertES Engineered Seal based on reference type A,B or C,

ES1) Special feature: internal circulation device for plan 23, perfluoroelastomer secondary seals.

<80ºC (176 ºF)

-40 ºC…-5 ºC (-40 ºF...23 ºF)-5 ºC...176ºC

(23 ºF...500 ºF)

No

n-H

ydro

carb

on

s(r

efer

s to

AP

I 68

2 4t

h ed

, A

nnex

A,

shee

t 3)

Recommended standard seal

H2SO4 ≤ 20%, 25 ºC (77 ºF )H3SO4 ≤ 20%, 80 ºC (176 ºF )

Caustic, Amines, Crystalize

Media /Piping plan

B C

1 2 3 1 2

UF

L8

50V

N

UF

L8

50V

N-T

a

UF

L8

50V

N-T

a

UF

L8

50V

N-D

UF

L6

50

UF

L6

50-

D

UF

LW

T80

0

2CW

-CW

3CW

-FB

1CW

-FL

3

Seal Coding SystemMechanical seal Design options Size Plans

Category Arrangement Type Containment Device Secondary Seal Material Face Material Shaft Size Piping Plan

123

123

ABC

Dual seal with different seal types in the inner and outerposition:

Inner type / Outer typee.g. B/A

PPlain gland for Arrangement 2 and 3

F FKM MCarbon vs Nickel Bound Tungsten Carbide

Three digits,rounded up to thenext whole millimeter

Examples45.00 mm: 04547.25 mm: 04848.63 mm: 048

XXX: Unspecified

Listed in numericalorder, separatedby a forward slash

LFloating throttle bushingfor Arrangement 1,Category 1, 2, 3

G PTFE NCarbon vs Reaction Bonded Silicon Carbide

FFixed throttle bushing for Arrangement 1, Category 1

H Nitrile O

Reaction Bonded Silicon Carbide vs Nickel Bound Tungsten Carbide

Pro

cess

Sid

e

Be

twee

n s

eals

Atm

os

ph

eri

c si

de

CContainment seal for 2CW-CS, 2NC-CS

I FFKM P

Reaction Bonded Silicon Carbide vs Reaction Bonded Silicon Carbide

S

Floating, segmentedcarbon bushing may be specified for Category 1,2, 3

R Flexible graphite QSintered Silicon Carbide vs sintered silicon carbide

01 51 61 9902 52 62

03 53A 65A

X Unspecified X Unspecified RCarbon vs Sintered Silicon Carbide

11 53B 65B

12 53C 66ADual seal with differentsecondary seal materialsat the inner and outerposition:

Inner material/Outer material

e.g. I/F

S

Graphite loaded, Reaction Bonded Silicon Carbide vs Reaction Bonded Silicon Carbide

13 54 66B

14 55

21 71

22 72

T

Graphite loaded, Sintered Silicon Carbide vs Sintered Silicon Carbide

23 74

31 75

32 76

41 72

X Unspecified

Dual seal with different face materials at the inner and outer position:Inner material/Outer materiale. g. P/N

ExampleMechanical Seal Design Options Size Plans

Category Arrangement Type Containment Device Secondary Seal Material Face Material Shaft Size Piping Plan

2 2 A P: Plain gland I: FFKM (Inner position)F: FKM (Outer position)

N: Carbon vs Reaction Bonded Silicon Carbide

050 02/52

Seal designation: 22A-PI/FN-050-02/52

API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.

Category Category 1

Configuration 1CW-FX 2CW-CW 2NC-CS 3CW-FB 3NC-BB

Mec

hani

cal S

eal

Seal Type A

Rota

ting

CTX-API-SN CTX-API-DN GSPH-Ta CTX-API-DN GSPH-KDSt

atio

nary

Category Category 2 and 3

Configuration 1CW-FL 2CW-CW 2CW-CS 2NC-CS 3CW-FB 3CW-BB 3CW-FF 3NC-FB 3NC-BB 3NC-FF

Mec

hani

cal S

eal

Seal Type A

Rota

ting

B750VN B750VK B750VK-

GSPH GSPH-Ta B750VK B750VK-D GSPH-KD

Stat

iona

ry

SB SB-Ta SB-Ta SB-D

Seal Type B

Rota

ting

UFL850 UFL850-Ta UFL850-Ta UFL850-D

Seal Type C

Rota

ting

UFLWT800 UFLWT800-Ta UFLWT800-Ta UFLWT800-D

Stat

iona

ry

UFL650 UFL650-Ta UFL650-Ta UFL650-D



Category Category 1Configuration 1CW-FX 2CW-CW 2NC-CS 3CW-FB 3NC-BB

API P

IPIN

G P

LAN

SPlan 01

PRO

CESS

SID

E

Plan 02 Plan 03

Plan 11 (12) Plan 13 Plan 14

Plan 21 (22) ∆

Plan 23

Plan 31 ∆

Plan 41 ∆

Plan 32 ∆

Plan 52

BETW

EEN

SEA

LS

Plan 55

Plan 53A Plan 53B Plan 53C Plan 54

Plan 72 (71) Plan 74 Plan 75

Plan 76

Recommended ∆ Possible

Category Category 1

Configuration 1CW-FX 2CW-CW 2NC-CS 3CW-FB 3NC-BB

API P

IPIN

G P

LAN

S

Plan 51

ATM

OSP

HER

IC S

IDE ∆

Plan 62 (61) ∆

Plan 65A ∆ ∆

Plan 65B ∆ ∆

Plan 66A

Plan 66B

Plan 99




Category Category 2 and 3

Configuration 1CW-FL 2CW-CW 2CW-CS 2NC-CS 3CW-FB 3CW-BB 3CW-FF 3NC-FB 3NC-BB 3NC-FF

API

PIP

ING

PLA

NS

Plan 01

PRO

CESS

SID

E

∆ ∆ ∆

Plan 02

Plan 03

Plan 11 (12) ∆ ∆ ∆ ∆ ∆

Plan 13 ∆ ∆

Plan 14 ∆ ∆

Plan 21 (22) ∆ ∆ ∆ ∆ ∆

Plan 23

Plan 31 ∆ ∆ ∆

Plan 41 ∆ ∆ ∆

Plan 32 ∆ ∆ ∆


Category Category 2 and 3Configuration 1CW-FL 2CW-CW 2CW-CS 2NC-CS 3CW-FB 3CW-BB 3CW-FF 3NC-FB 3NC-BB 3NC-FF

API P

IPIN

G P

LAN

S

Plan 52

Plan 55

Plan 53A

BETW

EEN

SEA

LS

Plan 53B

Plan 53C

Plan 54

Plan 72 (71)

Plan 74

Plan 75

Plan 76

Plan 51

ATM

OSP

HER

IC S

IDE

Plan 62 (61) ∆ ∆ ∆ ∆

Plan 65A ∆ ∆ ∆ ∆

Plan 65B ∆ ∆ ∆ ∆

Plan 66A

Plan 66B

Plan 99



API Piping PlansInstrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL

TI Temperature indicator

TIT

LIT HLA

PDIT LLA

PI NLL

PIT

Temperature transmitter with local indicator

Level transmitter with local indicator

High level alarm set point

Differential pressure transmitter with local indicator Low level alarm set point

Pressure indicator Normal liquid level

Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler

Pressure transmitter with local indicator

Strainer, Y

Valve, normally open

Valve, normally closed

Valve, check

Valve, needle

Valve, pressure control

Valve, pressure relief

PROCESS SIDE

Plan 01 Plan 12

Integral (internal) recirculation from the pump discharge to seal chamber.

Recirculation from the pump discharge through a strainer and a flow control orifice into the seal chamber.

Recirculation from pump discharge through a strainer, a flow control orifice and a cooler into the seal chamber.

Plan 22

API Piping Plans

PROCESS SIDE

Recirculation from the seal chamber through a flow control orifice and back to the pump suction or pump suction piping.

Recirculation from a circulation device in the seal chamber through a cooler and back into the seal chamber.

Dead-ended seal chamber with no recirculation of flushed fluid. Flush connections plugged.

Plan 23Plan 13Plan 02

Instrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



API Piping Plans

PROCESS SIDE

Instrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 03 Plan 14 Plan 31

Recirculation from the pump discharge through a cyclone separator delivering the clean fluid to the seal chamber. The solids are delivered to the pump suction line.

Recirculation from pump discharge through a flow control orifice to the seal and simultaneously from the seal chamber through a flow control orifice to pump suction.

Circulation between the seal chamber and the pump created by the design of the seal chamber. Flush connections plugged.

API Piping Plans

PROCESS SIDE

Instrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 11 Plan 21 Plan 41

Recirculation from the pump discharge through a cyclone separator delivering the clean fluid to a cooler and then to the seal chamber. The solids are delivered to the pump suction line.

Recirculation from pump dischargethrough a flow control orifice and coolerinto the seal chamber.

Recirculation from the pump dischargethrough a flow control orifice into the sealchamber.

API Piping Plans

PROCESS SIDE

Instrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 32

Injection of clean fluid into the sealchamber from an external source.

API Piping Plans

BETWEEN SEALS

Instrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Reservoir providing buffer liquid for theouter seal of an arrangement 2unpressurized dual seal. The buffer liquid

Plan 52 Plan 53C

Recirculation from pump dischargethrough a flow control orifice and coolerinto the seal chamber.

Plan 71

Tapped connections for the purchaser’s use e.g., for future use of buffer gas.


FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 55

Unpressurized external buffer fluidsystem supplying clean buffer liquid forthe outer seal of an arrangement2 unpressurized dual seal. Buffer liquidis circulated by an external pump orpressure system.

Plan 54

Pressurized external barrier fluidsystem supplying clean liquid for anarrangement 3 pressurized dual seal.The barrier liquid is maintained at apressure greater than seal chamberpressure and is circulated by anexternal pump or pressure system.

Plan 74

Externally supplied barrier gas for arrangement 3 dual pressurized non-contacting gas seals (3NC-FB, 3NC-BB, 3NC-FF).

BETWEEN SEALS


FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 53 A

Pressurized barrier fluid reservoirsupplying clean fluid for anarrangement 3 pressurized dual seal.

Plan 72

Externally supplied buffer gas forarrangement 2 unpressurized seals with adry running containment seal (2CW-CSand 2NC-CS). Buffer gas is maintained at apressure less than seal chamber pressure.The buffer gas pressure should notexceed 0.7 bar (10 PSI).

Plan 75

A containment seal chamber leakage collection system for condensing or mixed phase leakage on arrangement2 unpressurized seals with containment seals (2CW-CS and 2NC-CS).

BETWEEN SEALS


FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 53 B

Barrier fluid system pressurized by abladder accumulator supplying cleanliquid for an arrangement 3 pressurizeddual seal.

Plan 76

A containment seal chamber drain for non-condensing leakage on arrangement 2 unpressurized seals with containment seals (2CW-CS and 2NC-CS). Used if the pumped fluid does not condense at ambient temperatures.

BETWEEN SEALS

API Piping Plans

ATMOSPHERIC SIDE

Plan 51

Reservoir providing a dead-ended blanketfor fluid to the quench connection of thegland plate. Only recommended forvertical pumps.

Plan 65A

Atmospheric leakage collection and alarmsystem for condensing leakage. Failure ofthe seal will be detected by an excessiveflow rate into the leakage collectionsystem.

Plan 66B

An orifice plug in the drain port minimizes the seal leakage leaving the seal gland and allows for detection of a seal failure by an alarm of the monitoring pressure transmitter.

Instrument symbols

FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle




FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 62

Quench stream from an external sourceto the atmospheric side of the seal faces.The quench stream can be low pressuresteam, nitrogen or clean water.

Plan 65B

Atmospheric leakage collection and detection system for condensing leakage. Failure of the seal will be detected by a cumulative leakage into the system.

ATMOSPHERIC SIDE


FO Flow orifice

LI Level indicator

Equipment symbols

FIL


TIT

LIT HLA

PDIT LLA

PI NLL

PIT






Bladder accumulator

Cyclone separator

Filter, coalescing

Flow orifice

Seal cooler


Strainer, Y



Valve, check

Valve, needle



Plan 61

Tapped and plugged atmospheric-sideconnections for purchaser’s use.

Throttle bushings in the seal gland minimize the seal leakage leaving the seal gland and allow for detection of a seal failure by an alarm of the monitoring pressure transmitter.

Plan 66APlan 99

Engineered piping plan not defined byother existing plans.

ATMOSPHERIC SIDE

SELECTION OF BARRIER / BUFFER MEDIASealed Fluid Barrier/Buffer Fluid Special Demands General Demands

Not Specified Hydrocarbon fluid

Most desirable viscositybetween 2 and 10 mm2/s (cSt)at operating temperature •Three years continuous operation without

adverse deterioration•Consider local regulations regarding exposurelimits and hazard classifications (see safety datasheet)

•Compatibility with the sealed medium•Compatibility with the materials of the sealingsystem

•Initial boiling point 28 °C (82 °F) above exposed temperature

•If oxygen is present: flash point > servicetemperature

•Compatibility with max./min. process temperature•Freezing temperature < min. ambienttemperature at site

•Viscosity <500 mm2/s at the minimumtemperature to which it is exposed (before start-up)

•Check viscosity over the entire operatingtemperature range

•Consider limited gas solubility of viscous fluids (>10 bar (145 PSI)), released gas may cause foaming and loss of lubrication

Hydrocarbon fluids for high operatingtemperatures sometimes have a muchhigher viscosity at ambient temperatures and require specialcaution during start-up

For hydrocarbon streams, mineraloil may degrade at temperaturesabove 70 °C (158 °F)

Aqueous Streams

Mixture of water andethylene glycol

Ethylene glycol can be considered ahazardous material and/or waste

Mixture of water andpropylene glycol

Do not use commercially availableautomotive antifreeze (plating ofadditives at seal parts)

HydrocarbonStreams

Paraffin-based highpurity oils

With little or no additive forwear/oxidation resistance(plating of additives at sealparts)

Synthetic-based oils–

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Sealmatic Presentation API 682 4th Edition

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