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ASTM F2785-21
Standard Specification for Polyamide 12 Gas Pressure Pipe, Tubing, and Fittings
Přeložit název
NORMA vydána dne 1.7.2021
Informace o normě:
Označení normy: ASTM F2785-21
Datum vydání normy: 1.7.2021
Kód zboží: NS-1030404
Počet stran: 12
Přibližná hmotnost: 36 g (0.08 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM F2785-21 :
Keywords:
ICS Number Code 23.040.20 (Plastic pipes),23.040.45 (Plastic fittings)
Doplňující informace
| 1. Scope | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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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. Butt fusion joining shall be done in accordance with Practice F3372. Design considerations are discussed in Appendix X1. 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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| 2. Referenced Documents | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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