WATER

APPLICATIONS

PIPING

www.fgspipe.com • fgspipe@nov.com

Water Applications PipingApplications • District Heating & Cooling

• Steam Condensate Return• Waste Water

• Condenser and Cooling Tower Piping• NSF Listed for Potable Water• FM Approved for Underground Fire Mains

Materials andConstruction

We offer several products that have over 40 years of successful history incommercial and institutional water distribution systems.

Green Thread® Pipe - An epoxy based piping system available in 1”-42”diameters rated to 400 psig, up to 225°F.

Red Thread® II Pipe - An epoxy based piping system available in 2”-42”diameters rated to 400 psg, up to 210°F.

F-Chem® Pipe - Custom piping available through 72” diameter.

Fittings Fittings are manufactured with the same chemical/temperature capabilities as the pipe. Depending on the particular part and size, fittings will be compression molded, contact molded, hand fabricated or filament wound.

Joining Systems

Bell & SpigotMatched-taper joint secured with epoxy adhesive. Self-locking featureresists movement, facilitating joining runs of pipe without awaiting adhesivecure.

FlangedAvailable for all piping systems and diameters; factory assembled orshipped loose for assembly in the field.

Butt & WrapPlain end pipe or pipe and fittings butted together and wrapped with multiplelayers of resin-saturated mat or woven roving. Can be used with all pipingsystems and diameters.

Pipe

SizeRange

in. Resin

Pressure Rating psig

Inner Corrosion

Barrier/Liner Thickness

in.Temp. Rating

Joint Types

ASTM

D2310Class

Product/Installation

Manuals

Green Thread

1 - 42Aromatic

Amine Epoxy

225-450 0.015 - 0.030225°F107°C

Bell & Spigot

RTRP-11FFRTRP-11FY

CI300INS1000

Red Thread

II

2 - 3 Aromatic Amine Epoxy

225-450 Resin Rich210°F100°C

T.A.B. or Bell & Spigot

RTRP-11AF CI1200INS10004 - 42 RTRP-11AH

F-Chem 14 - 72Polyester,

Vinyl Ester

50-150 0.020 - 0.250200°F93°C

Bell & Spigot(1), Flanged, Butt & Wrap

RTRP-12EUCI1900

INS1010INS1000

2

(1) FChem bell x spigot joints are not available in all sizes. Consult factory for specific details.

1000400 500 600 700 800 2000 3000 4000

Gallons per Minute

1.0

10.0

.4

.5

.6

.7

.8

.9

2

3

456789

6"

6"

6"

8"

8"

8"10"

10"

10"

12"

12"

12"

FRPSteelPVCD

ynam

ic H

ead

Loss

(Fee

t H2O

/100

Ft.

of P

ipe)

FIGURE 1 • Pressure Loss Curves for WaterFRP & PVC based on Darcy-Weisbach & Colebrook Equations

Sch. 40 Used Steel based on Hazen-Williams Equation “C” Factor 100

Flow Properties

NOV Fiber Glass Systems piping has an absolute roughness of 0.00021 inches. This is equivalent to a Hazen-Williams coefficient of 150. The smooth surface coupled with large flow areas translates into:

• Lowfrictionloss•Smallerpumpmotors• Lowerenergycost•Abilitytoreducepipesize

Head losses for fiberglass, Schedule 40 steel and PVC pipe are shown in Figure 1.

3

8” Pipe Sch. 40

SteelSch. 80

PVCRed

Thread II

Design

Flow Rate (gpm) 1500 1500 1500

Flow Area (in.2) 50.0 45.0 54.8

Velocity (ft./sec.) 9.62 10.71(1) 8.78

Head Loss (ft)

Pipe (1000 ft)(2) 39.74 37.66 23.21

Elbows (14) 3.42 4.24 2.85

Gate Valves (2) 0.32 0.39 0.26

Elevation Change 10.00 10.00 10.00

Total Head Loss 53.48 52.3 36.32

Power

Brake Horsepower 25.3 24.76 17.20

Pump Horsepower(3) 29.8 29.13 20.23

Motor Usage(4) (kw) 22.2 21.72 15.09

Recommended Motor(5) 40 hp 40 hp 30 hp

(1) Exceeds manfacturer’s maximum recommended velocity(2) Hazen-Williams coefficient 80 for Sch. 40 Steel(3) 80% pump efficiency(4) 85% motor efficiency at ¾ load(5) ¾ load operation(6) 2010 Pricing Basis

TABLE 1 Pressure Drop and Power Consumption

3’3’

3’

5’

450’

3’

5’

12’

10’

3’

5’

1’1’

3’3’

3’

5’450’

3’

5’

20’3’

1’

GRADE

GRADE

GRADE

GRADE

BLD. WALL

Sample DesignA 500 ton cooling tower requires approximately 1,500 gpm condenser water. Using the system design in Figure 2, Table 1, compare the pressure drop and horsepower requirement of 8” pipe using the following materials:

Red Thread II Schedule 40 steel Schedule 80 PVC

Centrifugal PumpsClose Mounted, 230/460V, 3-Phase Motors

FIGURE 2

Project Life 25 Years Annual System Usage Time 75% Electrical Cost 10 cents/Kwh Discount Rate 4%

4

Life CycleCost ComparisonThis comparison does not take into account the cost reductions for fiberglass piping systems due to:

• Elimination of cathodic protection needed with steel pipe • Reduces water treatment chemical use• Lighter load rated pipe support systems• Fewer pipe supports needed than with PVC pipe• Lower maintenance cost

Cost Description(1)8” Sch. 40 Steel

8” Sch. 80 PVC

8” Red Thread II

Year Zero Cost

Pump, Motor & Combination Starter

$10,271 $10,271 $9,124

Pipe Installed Cost $91,664 $76,054 $90,902

Total Installed Cost $101,935 $86,325 $100,026

Annual Electrical Cost $15,237 $14,899 $10,347

Present Worth 30 Yr. Life Cycle Cost

$373,698 $352,054 $284,568

TABLE 2 Pipe Type vs. Life Cycle Cost

5

(1) 2010 Pricing Basis

Pipe Support Comparison

The light weight and high strength of fiberglass pipe results in support spans comparable with Schedule 40 steel pipe spans. PVC pipe typically requires three times the number of supports as required for fiberglass piping Table 3 contains typical support spans versus operating temperature for fiberglass, PVC and steel pipe.

Fiberglass pipe is typically one-eighth the weight of steel (see Table 4). Fiberglass pipe filled with water weighs 40% - 50% less than Schedule 40 steel resulting in lower loads on supports and buildings. (See Table 5)

Nominal Diameter Pipe Material

Spans, ft.

75 150 200

6”

Sch. 40 Steel 17.0 17.0 17.0

Green Thread 20.5 19.1 18.0

Red Thread II 19.2 18.3 17.5

Sch. 80 PVC 9.4 NR NR

8”

Sch. 40 Steel 19.0 19.0 19.0

Green Thread 23.3 21.7 20.4

Red Thread II 21.1 20.0 19.2

Sch. 80 PVC 10.4 NR NR

10”

Sch. 40 Steel 22.0 22.0 22.0

Green Thread 26.0 24.2 22.8

Red Thread II 23.2 22.0 21.1

Sch. 80 PVC 11.2 NR NR

12”

Sch. 40 Steel 23.0 23.0 23.0

Green Thread 27.9 26.0 24.4

Red Thread II 20.5 23.9 22.9

Sch. 80 PVC 12.3 NR NR

TABLE 3 • Water Filled Pipe Support Spans (ft) For Typical Operating Temperatures (F)

FRP based on ½” max. mid-span deflection Steel & PVC based on published dataNR = Not recommended at temperature

6

TABLE 4 • Pipe Weight per Foot (lbs.)

Nominal Diameter 6” 8” 10” 12”

Sch. 40 Steel 18.9 28.5 40.8 53.5

Green Thread 2.4 3.9 5.9 7.7

Red Thread II 2.4 3.3 5.3 7.2

Sch. 80 PVC 5.5 8.3 12.2 16.9

TABLE 5 • Weight Per 20 FootJoint filled with Water (lbs.)

Nominal Diameter 6” 8” 10” 12”

Sch. 40 Steel 630 1005 1500 2041

Green Thread 323 544 831 1169

Red Thread II 327 540 827 1161

Sch. 80 PVC 331 556 859 1206

NOV Fiber Glass Systems’ fiberglass reinforced thermoset resin (FRP) piping systems have relatively low rates of thermal expansion when compared to other materials commonly used in water systems. While PVC expands at 5 times the rate of carbon steel, FRP pipe only expands 1½ to 2 times.

The low rates of expansion and flexibility of fiberglass allow for easy anchor, guide and support design (reference Engineering and Piping Design Guide).

Thermal Expansion Comparison

Case Histories

7

City of CovingtonWastewater Treatment Plant

Nebraska HospitalCooling Tower

Dallas, Texas Wastewater Treatment Plant

Oracle,ArizonaBio Dome

Semiconductor Process Waste Stream

NorthernAlberta,CanadaHot Process Water

©2012 National Oilwell Varco. All rights reserved.ENG1100 March 2011

www.fgspipe.com • fgspipe@nov.com

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