Customer Support: 131 242

  • There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

ASTM D 7194 : 2019

Current
Current

The latest, up-to-date edition.

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

Hardcopy , PDF

Language(s)

English

Published date

17-09-2019

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 high molecular weight, good molecular weight retention during processing, dimensional stability, controlled crystallinity, 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°C (160°F), 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 13, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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

1.10This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee
D 20
DocumentType
Standard
Pages
7
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

ASTM D 7211 : 2013 : R2018 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 883 : 2023 Standard Terminology Relating to Plastics
ASTM D 883 : 2024 Standard Terminology Relating to Plastics
ASTM D 1708 : 2002 Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens
ASTM D 883 : 2022 Standard Terminology Relating to Plastics
ASTM D 883 : 2020 : REV B Standard Terminology Relating to Plastics
ASTM D 1204 : 2014 : R2020 Standard Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature
ASTM D 3045 : 2018 Standard Practice for Heat Aging of Plastics Without Load
ASTM D 4591 : 2017 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 638 : 2014 Standard Test Method for Tensile Properties of Plastics
ASTM D 1600 : 2018 Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)
ASTM D 1430 : 2022 Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 618 : 2013 Standard Practice for Conditioning Plastics for Testing
ASTM D 2512 : 2017 Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques) (Withdrawn 2023)
ASTM G 86 : 2017 Standard Test Method for Determining Ignition Sensitivity of Materials to Mechanical Impact in Ambient Liquid Oxygen and Pressurized Liquid and Gaseous Oxygen Environments
ASTM D 618 : 2021 Standard Practice for Conditioning Plastics for Testing
ASTM D 4591 : 2022 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 7211 : 2023 Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
ASTM D 638 : 2022 Standard Test Method for Tensile Properties of Plastics

View more information
$103.13
Including GST where applicable

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.

Need help?
Call us on 131 242, then click here to start a Screen Sharing session
so we can help right away! Learn more