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ASTM F781

1995 Edition, January 1, 1995

Complete Document

Standard Specification for Perfluoro (Alkoxyalkane) Copolymer (PFA) Plastic-Lined Ferrous Metal Pipe and Fittings



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Product Details:

  • Revision: 1995 Edition, January 1, 1995
  • Published Date: September 10, 1995
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: ASTM International (ASTM)
  • Page Count: 4
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:



1. Scope

1.1 This specification covers factory-made perfluoro (alkoxyalkane) copolymer (PFA) plastic-lined ferrous metal pipe and fittings, primarily intended for conveying corrosive liquids and gases. Requirements for materials, workmanship, dimensions, design, construction, working pressures and temperatures, test methods, and markings are included.

1.2 The values given in parentheses are provided for information purposes only.

NOTE 1--This specification does not include products coated with PFA nor does it define the suitability of PFA-lined components in chemical environments.

1.3 The ferrous piping products shall meet the requirements of the relevant specification listed in 1.3.1 through 1.4. Nominal sizes from 1 through 12 in. in 150 and 300 psi (1.0 to 2.0 MPa) ratings are covered.

NOTE 2--The PFA sealing faces may prevent achievement of the full pressure rating of the ferrous housings. For pressure limitations, the manufacturer should be consulted.

1.3.1 For Ferrous Pipe:

1.3.2 For Ferrous Flanges:

1.3.3 For Ferrous Fittings:

1.4 The PFA-lined flanged pipe and fitting assemblies are limited to use from −20 to 500°F (−29 to 260°C). For use below −29°C (−20°F) consult the manufacturer.

NOTE 3--The above temperature limitations are based on noncorrosive test conditions. Use in specific aggressive environments may alter the above temperatures, and these limits shall be established by mutual agreement between the purchaser and manufacturer.