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ASTM D7211-06

(Specification)

Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use

Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use

ABSTRACT
This specification establishes the requirements for finished parts machined from unplasticized polychlorotrifluoroethylene (PCTFE) homopolymers containing regrind and recycled polymer intended for general commercial use. This specification does not cover parts machined from PCTFE copolymers, PCTFE films or tapes, or modified PCTFE containing pigments or plasticizers. Nor does it cover PCTFE parts used in aerospace applications involving storage and handling of oxygen media, air media, inert media, and certain reactive media (specifically ammonia, gaseous hydrogen, and liquid hydrogen), wherein dimensional stability, high molecular weight, molecular weight retention, and crystallinity control are important considerations. Materials shall be tested on and conform accordingly to the following properties: specific gravity; melting point; deformation under load; zero strength time (ZST); annealing performance; and dimensional stability.
SCOPE
1.1 This specification is intended to be a means of calling out finished machined parts ready for commercial use.
1.2 This specification establishes requirements for parts machined from unplasticized, 100 % polychlorotrifluoroethylene (PCTFE) homopolymers.
1.3 This 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).
1.4 This specification allows for parts containing regrind and recycled material.
1.5 The specification does not cover PCTFE parts used in aerospace applications involving storage and handling of oxygen media, air media, inert media, and certain reactive media (specifically ammonia, gaseous hydrogen, and liquid hydrogen), in which dimensional stability, high molecular weight, molecular weight retention, and crystallinity control are important considerations. For aerospace grade, machined PCTFE parts, use Specification D 7194.
1.6 ApplicationPCTFE parts covered by this specification are made of 100 % PCTFE resin, free of plasticizers, fillers, or other additives. The parts meet specific physical characteristics appropriate for their end use, and are typically used in applications requiring good electrical properties or resistance to aggressive chemical media. General purpose PCTFE parts include seals, gaskets, valve and pump parts (cryogenic and noncryogenic), translucent tubing, sight glasses, flowmeter tubes, heavy-walled solid pipes and fittings, gears, cams, bearings, laboratory ware, circuit boards, electrical connector covers and switches, radome covers, and a variety of other stock shapes. They are removed and replaced during normal maintenance procedures. The parts also experience static or dynamic mechanical loading, and temperatures ranging from cryogenic to temperatures at or above the glass transition temperature, Tg = 55C [131F].Note 1
Quick-quenched PCTFE will potentially exhibit dimensional relaxation in the vicinity of Tg.Note 2
Although no recommendations are made regarding the limiting upper use temperature of PCTFE, the heat deflection temperature of PCTFE as determined by Test Method D 648 is 126C [259F].
1.7 The values stated in SI units are to be regarded as standard. The values in brackets are for information only.
The following precautionary caveat pertains only to the test methods portion, Section , 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 determine the applicability of regulatory limitations prior to use.Note 3
There is no equivalent ISO standard.

General Information

Status
Historical
Publication Date
14-Mar-2006
ICS
83.140.01 - Rubber and plastics products in general
Technical Committee
D20 - Plastics
Drafting Committee
D20.15 - Thermoplastic Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D7211-05 - Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
Effective Date
15-Mar-2006
Replaced By
ASTM D7211-13 - Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
Effective Date
01-May-2013
Referred By
ASTM D1430-22 - Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
Effective Date
15-Mar-2006
Referred By
ASTM D7194-19 - Standard Specification for Aerospace Parts Machined from Polychlorotrifluoroethylene (PCTFE)
Effective Date
15-Mar-2006

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ASTM D7211-06 - Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General UseASTM D7211-06 - Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
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ASTM D7211-06 - Standard Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D7211 −06
StandardSpecification for
Parts Machined from Polychlorotrifluoroethylene (PCTFE)
1
and Intended for General Use
This standard is issued under the fixed designation D7211; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* cryogenic to temperatures at or above the glass transition
temperature, T = 55°C (131°F).
g
1.1 This specification is intended to be a means of calling
out finished machined parts ready for commercial use.
NOTE 1—Quick-quenched PCTFE will potentially exhibit dimensional
relaxation in the vicinity of T .
g
1.2 This specification establishes requirements for parts
NOTE 2—Although no recommendations are made regarding the limit-
machined from unplasticized, 100 % polychlorotrifluoroethyl-
ing upper use temperature of PCTFE, the heat deflection temperature of
ene (PCTFE) homopolymers.
PCTFE as determined by Test Method D648 is 126°C (259°F).
1.7 The values stated in SI units are to be regarded as
1.3 This specification does not cover parts machined from
PCTFE copolymers, PCTFE film or tape less than 0.25-mm standard. The values in parentheses are for information only.
(0.010-in.) thick, or modified PCTFE (containing pigments or
1.8 The following precautionary caveat pertains only to the
plasticizers).
test methods portion, Section 11, of this specification:This
standard does not purport to address all of the safety concerns,
1.4 This specification allows for parts containing regrind
if any, associated with its use. It is the responsibility of the user
and recycled material.
of this standard to establish appropriate safety and health
1.5 The specification does not cover PCTFE parts used in
practices and determine the applicability of regulatory limita-
aerospace applications involving storage and handling of
tions prior to use.
oxygen media, air media, inert media, and certain reactive
media (specifically ammonia, gaseous hydrogen, and liquid NOTE 3—There is no known ISO equivalent to this standard.
hydrogen), in which dimensional stability, high molecular
2. Referenced Documents
weight, molecular weight retention, and crystallinity control
2
2.1 ASTM Standards:
are important considerations. For aerospace grade, machined
D621 Specification for Jute Rove and Plied Yarn for Elec-
PCTFE parts, use Specification D7194.
3
trical and Packing Purposes (Withdrawn 2000)
1.6 Application—PCTFE parts covered by this specification
D648 Test Method for Deflection Temperature of Plastics
are made of 100 % PCTFE resin, free of plasticizers, fillers, or
Under Flexural Load in the Edgewise Position
other additives.The parts meet specific physical characteristics
D792 Test Methods for Density and Specific Gravity (Rela-
appropriate for their end use, and are typically used in
tive Density) of Plastics by Displacement
applications requiring good electrical properties or resistance
D883 Terminology Relating to Plastics
to aggressive chemical media. General purpose PCTFE parts
D1430 ClassificationSystemforPolychlorotrifluoroethylene
include seals, gaskets, valve and pump parts (cryogenic and
(PCTFE) Plastics
noncryogenic), translucent tubing, sight glasses, flowmeter
D1600 Terminology forAbbreviatedTerms Relating to Plas-
tubes, heavy-walled solid pipes and fittings, gears, cams,
tics
bearings, laboratory ware, circuit boards, electrical connector
D2117 Test Methods for Carbon Black—Surface Area by
covers and switches, radome covers, and a variety of other
3
Nitrogen Adsorption (Withdrawn 1999)
stock shapes. They are removed and replaced during normal
D4591 Test Method for Determining Temperatures and
maintenance procedures. The parts also experience static or
Heats of Transitions of Fluoropolymers by Differential
dynamic mechanical loading, and temperatures ranging from
Scanning Calorimetry
1 2
This specification is under the jurisdiction of ASTM Committee D20 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved March 15, 2006. Published April 2006. Originally the ASTM website.
3
approved in 2005. Last previous edition approved in 2005 as D7211 - 05. DOI: The last approved version of this historical standard is referenced on
10.1520/D7211-06. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
...

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This specification establishes the requirements for finished parts machined from unplasticized polychlorotrifluoroethylene (PCTFE) homopolymers containing regrind and recycled polymer intended for general commercial use. This specification does not cover parts machined from PCTFE copolymers, PCTFE films or tapes, or modified PCTFE containing pigments or plasticizers. Nor does it cover PCTFE parts used in aerospace applications involving storage and handling of oxygen media, air media, inert media, and certain reactive media (specifically ammonia, gaseous hydrogen, and liquid hydrogen), wherein dimensional stability, high molecular weight, molecular weight retention, and crystallinity control are important considerations. Materials shall be tested on and conform accordingly to the following properties: specific gravity; melting point; deformation under load; zero strength time (ZST); annealing performance; and dimensional stability.
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1.3 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.  
1.4 This 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.

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ASTM
ASTM D4495-21(Test Method)
Standard Test Method for Impact Resistance of Poly(Vinyl Chloride) (PVC) Rigid Profiles by Means of a Falling Weight

SIGNIFICANCE AND USE
5.1 The impact strength of PVC profiles relates to suitability for service and to quality of processing. Impact tests are used for quality-control purposes and as an indication that products can withstand handling during assembling, installation, or in service.  
5.2 Results obtained by use of this test method are used in two ways:  
5.2.1 As the basis for establishing impact-test requirements in product standards, and  
5.2.2 To measure the effect of changes in materials or processing.
SCOPE
1.1 This test method covers the determination of the energy required to crack or break rigid poly(vinyl chloride) (PVC) profile under specified conditions of impact by means of a falling weight.  
1.2 This test method is used either by itself or in conjunction with other methods for measuring PVC product toughness.  
1.3 Because of the wide variety of profile sizes and shapes and the wide variety of manufacturing procedures and field abuse, this test method does not correlate universally with all types of abuse. Therefore, correlations must be established as needed.  
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.  
1.5 The values stated in inch-pound units are to be regarded as the standard.  
1.6 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.  
1.7 This 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.

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ASTM
ASTM D8366-21a(Specification)
Standard Specification for Extruded and Compression Molded Shapes Made from Unfilled Poly(Vinylidene Fluoride) PVDF

SCOPE
1.1 This specification covers the requirements and test methods for the material, dimensions, workmanship, and the properties of extruded sheet, rod and tubular bar manufactured from unfilled PVDF.  
1.2 This specification covers the requirements and test methods for the material, dimensions, workmanship, and the properties of extruded and compression molded shapes manufactured from unfilled PVDF.  
1.3 The properties included in this specification are those required for shapes made from PVDF polymers. Requirements necessary to identify particular characteristics of the shape are included in Section 5.  
1.4 This specification allows for the use of up to 20 % process regrind and reprocessed plastic, total, and of uncontaminated quality.  
1.5 The values stated in English Units are to be regarded as the standard in all property and dimensional tables. For reference purposes, SI units are also included.  
1.6 The following safety hazards caveat pertains only to the test method or test methods described in 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.  
1.7 This 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.

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