ASTM F2785-18
(Specification)Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
SCOPE
1.1 This specification covers requirements and test methods for the characterization of polyamide 12 pipe, tubing, and fittings for use in fuel gas mains and services for direct burial and reliner applications. The pipe and fittings covered by this specification are intended for use in the distribution of natural gas.
1.1.1 Pipe and fittings covered by this specification shall not be joined using taper pipe threads. Joining methods qualified in accordance with the requirements of Title 49 CFR Part 192.283 are acceptable. Generic fusion guidelines are given in Appendix X1. Design considerations are discussed in Appendix X2. In-plant quality control programs are specified in Annex A1.
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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: Pipe and fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 3, Class 2, and Grade 3 (PA323 or PA11) are intended for use with pipe manufactured from compounds meeting the requirements of Group 3, class 2 and Grade 3. Pipe and fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 4, Class 2 and Grade 3 (PA 423 or PA12) are intended for use with pipe manufactured from compounds meeting the requirements of Group 4, Class 2 and Grade 3. As per the recommendations of the respective resin manufacturers, no cross fusion between PA 323 (PA11) and PA 423 (PA12) compounds is permitted.
1.5 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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Designation:F2785 −18 An American National Standard
Standard Specification for
1
Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
This standard is issued under the fixed designation F2785; 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* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers requirements and test methods
mendations issued by the World Trade Organization Technical
for the characterization of polyamide 12 pipe, tubing, and
Barriers to Trade (TBT) Committee.
fittings for use in fuel gas mains and services for direct burial
and reliner applications. The pipe and fittings covered by this
2. Referenced Documents
specification are intended for use in the distribution of natural
2
gas.
2.1 ASTM Standards:
1.1.1 Pipeandfittingscoveredbythisspecificationshallnot
D543 Practices for Evaluating the Resistance of Plastics to
bejoinedusingtaperpipethreads.Joiningmethodsqualifiedin
Chemical Reagents
accordancewiththerequirementsofTitle49CFRPart192.283
D618 Practice for Conditioning Plastics for Testing
are acceptable. Generic fusion guidelines are given in Appen-
D648 Test Method for Deflection Temperature of Plastics
dix X1. Design considerations are discussed in Appendix X2.
Under Flexural Load in the Edgewise Position
In-plant quality control programs are specified in Annex A1.
D638 Test Method for Tensile Properties of Plastics
1.2 Thetextofthisspecificationreferencesnotes,footnotes,
D789 Test Methods for Determination of Solution Viscosi-
and appendixes which provide explanatory material. These
ties of Polyamide (PA)
notesandfootnotes(excludingthoseintablesandfigures)shall
D792 Test Methods for Density and Specific Gravity (Rela-
not be considered as requirements of the specification.
tive Density) of Plastics by Displacement
D1598 Test Method for Time-to-Failure of Plastic Pipe
1.3 The values stated in inch-pound units are to be regarded
Under Constant Internal Pressure
as standard. The values given in parentheses are mathematical
D1599 Test Method for Resistance to Short-Time Hydraulic
conversions to SI units that are provided for information only
Pressure of Plastic Pipe, Tubing, and Fittings
and are not considered standard.
3
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
1.4 This standard does not purport to address all of the
D1600 TerminologyforAbbreviatedTermsRelatingtoPlas-
safety concerns, if any, associated with its use. It is the
tics
responsibility of the user of this standard to establish appro-
D2122 Test Method for Determining Dimensions of Ther-
priate safety, health, and environmental practices and deter-
moplastic Pipe and Fittings
mine the applicability of regulatory limitations prior to use.
D2774 PracticeforUndergroundInstallationofThermoplas-
NOTE 1—Pipe and fittings utilizing heat fusion joining techniques
tic Pressure Piping
produced from compounds meeting the requirements of Group 3, Class 2,
D2290 Test Method for Apparent Hoop Tensile Strength of
andGrade3(PA323orPA11)areintendedforusewithpipemanufactured
Plastic or Reinforced Plastic Pipe
from compounds meeting the requirements of Group 3, class 2 and Grade
3. Pipe and fittings utilizing heat fusion joining techniques produced from D2837 Test Method for Obtaining Hydrostatic Design Basis
compoundsmeetingtherequirementsofGroup4,Class2andGrade3(PA
forThermoplasticPipeMaterialsorPressureDesignBasis
423 or PA12) are intended for use with pipe manufactured from com-
for Thermoplastic Pipe Products
pounds meeting the requirements of Group 4, Class 2 and Grade 3.As per
D6779 Classification System for and Basis of Specification
the recommendations of the respective resin manufacturers, no cross
for Polyamide Molding and Extrusion Materials (PA)
fusion between PA 323 (PA11) and PA 423 (PA12) compounds is
permitted.
F412 Terminology Relating to Plastic Piping Systems
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 15, 2018. Published June 2018. Originally the ASTM website.
3
approved in 2009 as F2785–09. Last previous edition approved in 2012 as The last
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F2785 − 12 F2785 − 18 An American National Standard
Standard Specification for
1
Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
This standard is issued under the fixed designation F2785; 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*
1.1 This specification covers requirements and test methods for the characterization of polyamide 12 pipe, tubing, and fittings
for use in fuel gas mains and services for direct burial and reliner applications. The pipe and fittings covered by this specification
are intended for use in the distribution of natural gas.
1.1.1 This specification does not cover threaded pipe. Pipe and fittings covered by this specification shall not be joined using
taper pipe threads. Joining methods qualified in accordance with the requirements of Title 49 CFR Part 192.283 are acceptable.
Generic fusion guidelines are given in Appendix X1. Design considerations are discussed in Appendix X2. In-plant quality control
programs are specified in Annex A1.
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes
and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—Pipe and fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 3, Class 2, and Grade
3 (PA323 or PA11) are intended for use with pipe manufactured from compounds meeting the requirements of Group 3, class 2 and Grade 3. Pipe and
fittings utilizing heat fusion joining techniques produced from compounds meeting the requirements of Group 4, Class 2 and Grade 3 (PA 423 or PA12)
are intended for use with pipe manufactured from compounds meeting the requirements of Group 4, Class 2 and Grade 3. As per the recommendations
of the respective resin manufacturers, no cross fusion between PA 323 (PA11) and PA 423 (PA12) compounds is permitted.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D618 Practice for Conditioning Plastics for Testing
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D638 Test Method for Tensile Properties of Plastics
D789 Test Methods for Determination of Solution Viscosities of Polyamide (PA)
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
3
D1898 Practice for Sampling of Plastics (Withdrawn 1998)
D1600 Terminology for Abbreviated Terms Relating to Plastics
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved Aug. 1, 2012April 15, 2018. Published September 2012June 2018. Originally approved in 2009 as F2785–09. Last previous edition approved
in 20102012 as F2785–10a.–12. DOI: 10.1520/F2785-12.10.1520/F2785-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the
...
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