06-ppfa v2.3 selecting

Post on 10-Apr-2018

215 views

Category:

Documents

0 download

Embed Size (px)

TRANSCRIPT

  • 8/8/2019 06-PPFA v2.3 Selecting

    1/12

    2003, 2004, 2005 - Plastics Pipe and Fittings Association

    Selecting the Proper

    Plastic Piping Material

  • 8/8/2019 06-PPFA v2.3 Selecting

    2/12

    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.

  • 8/8/2019 06-PPFA v2.3 Selecting

    3/12

    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

  • 8/8/2019 06-PPFA v2.3 Selecting

    4/12

    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

  • 8/8/2019 06-PPFA v2.3 Selecting

    5/12

    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.

  • 8/8/2019 06-PPFA v2.3 Selecting

    6/12

    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

  • 8/8/2019 06-PPFA v2.3 Selecting

    7/12

    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

    2

    3

    3

  • 8/8/2019 06-PPFA v2.3 Selecting

    8/12

    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

  • 8/8/2019 06-PPFA v2.3 Selecting

    9/12

    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

    3

    2

  • 8/8/2019 06-PPFA v2.3 Selecting

    10/12

    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

  • 8/8/2019 06-PPFA v2.3 Selecting

    11/12

    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

  • 8/8/2019 06-PPFA v2.3 Selecting

    12/12

    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