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ASTM D 7194 : 2012

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Specification for Aerospace Parts Machined from Polychlorotrifluoroethylene (PCTFE)
Available format(s)

Hardcopy , PDF

Superseded date

09-17-2019

Language(s)

English

Published date

10-01-2012

1.1This specification is intended to be a means of calling out finished machined parts ready for aerospace use. Such parts may also find use in selected commercial applications where there are clear benefits derived from the use of parts with known or controlled crystallinity, high molecular weight, good molecular weight retention during processing, dimensional stability in the finished part, and tightly controlled engineering tolerances.

1.2This specification establishes requirements for parts machined from virgin, unplasticized, 100 % polychlorotrifluoroethylene (PCTFE) homopolymers.

1.3This specification does not cover parts machined from PCTFE copolymers, PCTFE film or tape less than 0.25-mm (0.010-in.) thick, or modified PCTFE (containing pigments or plasticizers).

1.4This specification does not allow parts containing recycled material.

1.5The specification does not cover PCTFE parts intended for general use applications, in which control of dimensional stability, molecular weight, and crystallinity are not as important. For machined PCTFE parts intended for general use, use Specification D7211.

1.6This specification classifies parts into three classes based upon intended uses and exposures: oxygen-containing media, reactive media, and inert media.

1.7Application—PCTFE components covered by this specification are virgin, 100 % PCTFE resin, free of plasticizers and other additives. The components are combustion resistant in oxygen, dimensionally stable, and meet other specific physical characteristics appropriate for their end use. They are used in valves, regulators, and other devices in oxygen, air, helium, nitrogen, hydrogen, ammonia, and other aerospace media systems. The components typically are used as valve seats, o-rings, seals, and gaskets. They are removed and replaced during normal maintenance procedures. The components provide reliable sealing surfaces resulting in proper closure of valves and related devices and no leakage from the system into the environment. They will experience static mechanical loading, cyclic mechanical loading, temperatures ranging from cryogenic to 71 ºC (160 ºF), and pressures up to 68.9 MPa (10,000, psig) for oxygen and air media, and 103.4 MPa (15,000 psig) for inert media.

1.8The values stated in SI units are to be regarded as standard. The values in parentheses are for information only.

1.9The following precautionary caveat pertains only to the test methods portion, Section 12, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

Note 1There is no known ISO equivalent to this standard.

Committee
D 20
DocumentType
Standard
Pages
5
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM D 1430 : 2017 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics

ASTM D 1600 : 1999 Standard Terminology for Abbreviated Terms Relating to Plastics
ASTM D 1708 : 1996 Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens
ASTM D 7211 : 2013 : R2018 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
ASTM D 1708 : 2006 : REV A Standard Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
ASTM D 2512 : 1995 Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques)
ASTM D 1708 : 2002 Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens
ASTM D 7211 : 2006 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
ASTM D 1708 : 2006 Standard Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
ASTM D 1600 : 2007 Standard Terminology for Abbreviated Terms Relating to Plastics
ASTM D 1600 : 2013 Standard Terminology for Abbreviated Terms Relating to Plastics
ASTM D 1600 : 2014 Standard Terminology for Abbreviated Terms Relating to Plastics
ASTM D 4591 : 2001 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 4591 : 2007 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 1600 : 2008 Standard Terminology for Abbreviated Terms Relating to Plastics
ASTM D 4591 : 2007 : R2012 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 7211 : 2005 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
ASTM D 1430 : 2017 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 2512 : 1995 : R2002 Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques)
ASTM D 1430 : 2000 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 4591 : 1997 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 7211 : 2013 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
ASTM D 1430 : 2011 : R2016 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 4591 : 2017 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 1430 : 2003 : R2008 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 1430 : 2010 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 1600 : 2018 Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
ASTM D 2512 : 1995 : R2002 : EDT 1 Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques)
ASTM D 1708 : 2013 Standard Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
ASTM D 2512 : 2017 Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques) (Withdrawn 2023)
ASTM D 1708 : 2010 Standard Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
ASTM D 2512 : 1995 : R2008 Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques) (Withdrawn 2017)
ASTM D 1708 : 2002 : REV A Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens
ASTM D 1430 : 2011 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 1430 : 2003 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 1708 : 2018 Standard Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens

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