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2003, 2004, 2005 - Plastics Pipe and Fittings Association

Selecting the Proper

Plastic Piping Material

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2 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Selecting the ProperPlastic Piping Material

To select the proper plastic piping material,

conditions of service for the liquid to be handled andthe suitability of the materials for those serviceconditions must be known. Listed is a summary andexample of selecting the proper plastic pipingmaterial.

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3 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Service Conditions Check List

Type Application

Type Fluid(s)

Working Pressure (min/max)

Working Temperature (min/max)

Velocity (max)

Specific Gravity

Viscosity

Particulates

Piping Size Range

Above- or Below-ground Installation

Interior/Exterior Exposure

Specific Code Agencies/Approvals

Fluid-handling Products In Fluid Contact

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4 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

TIPS Material Selection

Chemical Compatibility

Pressure/Temperature Compatibility

Piping Size and Product Availability

Piping System Joining Method

Price Comparability

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5 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Example Service Conditions

Service Conditions

Application: Metal Ore Smeltering

Fluid: Sulfuric Acid, 70% concentration

Working Pressure: 50-105 psi

Working Temperature: 70-130F

Velocity: Less than 3 ft/sec

Specific Gravity: 1.57

Viscosity: 60 ssu

Particulates: minimal

Piping Sizes: - 6

Installation: Above ground

Exposure: Interior

Code Agencies: Standard

Required Fluid-handlingEquipment:

Pipe / Fitting / Valve / Pump

* Conditions depicted in bold are major selection criteria for thisapplication.

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6 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Example Chemical Compatibility

Partial Chemical Resistance Chart

Chemical PVC CPVC PP PVDF PE

Temperature (F) 70 140 70 140 185 70 150 180 70 150 250 70 140

Sulfuric acid, 50% R R R R R R R NR R R R R

Sulfuric acid, 60% R R R R R R R NR R R R R

Sulfuric acid, 70% R R R R R R NR NR R R R R

Sulfuric acid, 80% R R R R R R NR NR R R R NR

Sulfuric acid, 90% R NR R R R R NR NR R R R NRSulfuric acid, 93% R NR R R NR R NR NR R R R NR

Sulfuric acid, 100% NR NR NR NR NR NR NR NR NR NR NR NR

R = Recommended = No information available NR = Not Recommended

Service Conditions

Fluid: Sulfuric Acid, 70% concentration

Working Temperature: 70-130F

23 3 23

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7 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Maximum Operating Pressure Ratings(psi) of Schedule 80 Piping / Fittings @ 73F

Nom. Pipe Size (in.) PVC / CPVC PE (SDR 11) PP PVDF

3 370 160 190 250

4 320 160 160 220

6 280 160 140 190

Example Pressure Compatibility

Service Conditions

Working Pressure: 50-105 psi

Working Temperature: 70-130F

Piping Sizes: - 6

Temperature Correction Factor for PipingTemp. (F) CPVC PE PP PVC PVDF

110 .77 .74 .80 .50 .75

120 .70 .63 .75 .40 .68

130 .62 .57 .68 .30 .62

CPVC0.62(280) = 174 psi

PVC0.30(280) = 84 psi(system max. is 105 psi)

PVDF0.62(190) = 118 psi

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8 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Example Joining System

Results of Previous Tests

CPVC PE PP PVC PVDF

ChemicalCompatibility

Pressure/Temp.Compatibility 23 3

3 3 322

Product Availability

CPVC PVDF

Joining System

CPVC = Solvent Cementing

PVDF = Heat Fusion

3 3

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9 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Example Cost Comparison

Estimates of 100-ft, 6-in Pipelines for Various Materials*

Materials Piping Costs ($) Ratio CS

PVC Sch. 80 11,499 0.50

CPVC Sch. 80 18,932 0.83

Carbon Steel Sch. 40 22,789 1.00

St. Steel 304L Sch. 40 45,835 2.01

Aluminum alloy 303 Sch. 40 48,134 2.11

St. Steel 316L Sch. 40 49,355 2.17

Copper 50,473 2.21

PVDF Sch. 80 63,945 2.81

Titanium Sch. 40 132,804 6.11

Alloy 200 Sch. 40 150,188 6.59

Zirconium Sch. 40 159,382 6.99

* Adapted from Chemical Processing, June 1999

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10 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Example Results

Results of Previous Tests

CPVC PE PP PVC PVDF

ChemicalCompatibility

Pressure/Temp.Compatibility

CostComparison

Selected Material

CPVC

23 33 3 322

3 2

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11 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

Example Addendum

3

3

33

3

If sulfuric acid concentration were 93%, only PVDFwould be selected

If sulfuric acid concentration were 60% and themaximum temperature were 120F, both CPVC andPP would be considered

If maximum temperature did not exceed 110F, both

PE and PVC would be considered

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12 - Selecting the Proper Plastic Piping Material 2003, 2004, 2005 - Plastics Pipe and Fittings Association

TIPS are...

Environmentally sound

Easy and safe to install Reliable

Long-lasting

Cost-effective