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ASTM F2785-09

(Specification)

Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings

Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings

ABSTRACT
This specification details the material and performance requirements, as well as the corresponding test methods, for the evaluation of polyamide 12 gas pressure pipes, tubing, and fittings that are intended for use in the distribution of natural gas in fuel gas mains and services for direct burial and reliner applications. It does not apply to threaded pipes. The pipes and fittings shall be made from virgin or reworked polyamide material that satisfies the short- and long-term hydrostatic design stress and hydrostatic design basis ratings, and rapid crack propagation (RCP) resistance properties. Properly sampled pipe and fitting specimens shall undergo test procedures and conform to the following requirements: workmanship; dimension (diameter, toe-in, wall thickness, wall thickness eccentricity range, ovality, and length); conditioning; slow crack growth resistance; resistance to RCP; minimum hydrostatic burst pressure/apparent tensile strength (quick burst); sustained pressure; outdoor storage stability; chemical resistance; elevated temperature service; butt fusion joints; butt heat fusion fittings; electrofusion fittings; mechanical fittings; transition fittings and anodeless risers; valves; and excess flow valves.
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. 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 and health 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.

General Information

Status
Historical
Publication Date
31-Jul-2009
ICS
23.040.20 - Plastics pipes
23.040.45 - Plastics fittings
Technical Committee
F17 - Plastic Piping Systems
Drafting Committee
F17.60 - Gas
Current Stage
Ref Project

Relations

Replaced By
ASTM F2785-09e1 - Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
Effective Date
01-Aug-2009
Referred By
ASTM F3508-21a - Standard Guide for In-Situ Pipeline Renovation As Dual-Wall Composite Pipeline by Push/Pull Installation of Compressed-Fit Shape-Memory-Polymer Tubular (SMPT)
Effective Date
01-Aug-2009
Referred By
ASTM F3372-20 - Standard Practice for Butt Fusion Joining of PA12 Pipe and Fittings
Effective Date
01-Aug-2009
Referred By
ASTM F3524/F3524M-23 - Standard Specification for Polyamide-12 (PA12) Line Pipe
Effective Date
01-Aug-2009
Referred By
ASTM F2145-23 - Standard Specification for Polyamide 11 (PA 11) and Polyamide 12 (PA12) Mechanical Fittings for Use on Outside Diameter Controlled Polyamide 11 and Polyamide 12 Pipe and Tubing
Effective Date
01-Aug-2009
Referred By
ASTM F1733-20 - Standard Specification for Butt Heat Fusion Polyamide(PA) Plastic Fitting for Polyamide(PA) Plastic Pipe and Tubing
Effective Date
01-Aug-2009
Referred By
ASTM F1948-20 - Standard Specification for Metallic Mechanical Fittings for Use on Outside Diameter Controlled Thermoplastic Gas Distribution Pipe and Tubing
Effective Date
01-Aug-2009
Referred By
ASTM F1973-21 - Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems
Effective Date
01-Aug-2009
Referred By
ASTM F3564-22 - Standard Practice for Determining Allowable Tensile Load for Polyamide-12 (PA12) Gas Pipe During Pull-In Installation
Effective Date
01-Aug-2009
Referred By
ASTM F2767-18 - Standard Specification for Electrofusion Type Polyamide-12 Fittings for Outside Diameter Controlled Polyamide-12 Pipe and Tubing for Gas Distribution
Effective Date
01-Aug-2009

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ASTM F2785-09 - Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and FittingsASTM F2785-09 - Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
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ASTM F2785-09 - Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
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Standards Content (Sample)

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.
An American National Standard
Designation: F2785 – 09
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 2. Referenced Documents
2
1.1 This specification covers requirements and test methods 2.1 ASTM Standards:
for the characterization of polyamide 12 pipe, tubing, and D543 Practices for Evaluating the Resistance of Plastics to
fittings for use in fuel gas mains and services for direct burial Chemical Reagents
and reliner applications. The pipe and fittings covered by this D618 Practice for Conditioning Plastics for Testing
specification are intended for use in the distribution of natural D638 Test Method for Tensile Properties of Plastics
gas. D789 Test Methods for Determination of Solution Viscosi-
1.1.1 This specification does not cover threaded pipe. Ge- ties of Polyamide (PA)
neric fusion guidelines are given in Appendix X1. Design D1598 Test Method for Time-to-Failure of Plastic Pipe
considerations are discussed in Appendix X2. In-plant quality Under Constant Internal Pressure
control programs are specified in Annex A1. D1599 TestMethodforResistancetoShort-TimeHydraulic
1.2 Thetextofthisspecificationreferencesnotes,footnotes, Pressure of Plastic Pipe, Tubing, and Fittings
3
and appendixes which provide explanatory material. These D1898 Practice for Sampling of Plastics
notesandfootnotes(excludingthoseintablesandfigures)shall D1600 Terminology for Abbreviated Terms Relating to
not be considered as requirements of the specification. Plastics
1.3 The values stated in inch-pound units are to be regarded D2122 Test Method for Determining Dimensions of Ther-
as standard. The values given in parentheses are mathematical moplastic Pipe and Fittings
conversions to SI units that are provided for information only D2774 Practice for Underground Installation of Thermo-
and are not considered standard. plastic Pressure Piping
1.4 This standard does not purport to address all of the D2290 Test Method for Apparent Hoop Tensile Strength of
safety concerns, if any, associated with its use. It is the Plastic or Reinforced Plastic Pipe by Split Disk Method
responsibility of the user of this standard to establish appro- D2837 TestMethodforObtainingHydrostaticDesignBasis
priate safety and health practices and determine the applica- forThermoplastic Pipe Materials or Pressure Design Basis
bility of regulatory limitations prior to use. for Thermoplastic Pipe Products
D4066 Classification System for Nylon Injection and Ex-
NOTE 1—Pipe and fittings utilizing heat fusion joining techniques
trusion Materials (PA)
produced from compounds meeting the requirements of Group 3, Class 2,
D6779 Classification System for Polyamide Molding and
andGrade3(PA323orPA11)areintendedforusewithpipemanufactured
from compounds meeting the requirements of Group 3, class 2 and Grade Extrusion Materials (PA)
3. Pipe and fittings utilizing heat fusion joining techniques produced from
F412 Terminology Relating to Plastic Piping Systems
compoundsmeetingtherequirementsofGroup4,Class2andGrade3(PA
F1025 Guide for Selection and Use of Full-Encirclement-
423 or PA12) are intended for use with pipe manufactured from com-
Type Band Clamps for Reinforcement or Repair of Punc-
pounds meeting the requirements of Group 4, Class 2 and Grade 3.As per
tures or Holes in Polyethylene Gas Pressure Pipe
the recommendations of the respective resin manufacturers, no cross
F1473 Test Method for Notch Tensile Test to Measure the
fusion between PA 323 (PA11) and PA 423 (PA12) compounds is
Resistance to Slow Crack Growth of Polyethylene Pipes
permitted.
and Resins
F1733 Specification for Butt Heat Fusion Polyamide(PA)
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
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic Standards volume information, refer to the standard’s Document Summary page on
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas. the ASTM website.
3
Current edition approved Aug. 1, 2009. Published September 2009. DOI: Withdrawn. The last approved version of this historical standard is referenced
10.1520/F2785-09. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F2785 – 09
Plastic Fitting for Polyamide(PA) Plastic Pipe and Tubing
...

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1.1 This specification covers 0.070 in. wall thickness crosslinked polyethylene (PEX) tubing that is outside diameter controlled, and intended for non-potable radiant heating applications for pressures up to 75 psig in sizes 5/8 NTS (nominal tubing size) and 7/8 NTS. This specification also includes fittings that are specifically designed for this 0.070 in.-wall PEX tubing. Only maximum 75-psig relief valves shall be used with this tubing. Included in this specification are requirements and test methods for material, workmanship, dimensions, burst pressure, hydrostatic sustained pressure, environmental stress cracking, stabilizer functionality, bent-tube hydrostatic pressure, excessive temperature and degree of crosslinking. Requirements for tubing markings are also given. This specification incorporates an optional middle or outer oxygen barrier layer. This tubing is not intended for field bending at temperatures above 120 ºF (49 ºC).  
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 The following safety hazards caveat pertains only to the test methods portion, Section 7, 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.  
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.

  • Technical specification
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