ASTM F2968 F2968M-20a 气体分配用交联聚乙烯（PEX）管的标准规范.pdf

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standardis.Guides and Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:F2968/F2968M-20a An American National Standard INTERNATIONAL Standard Specification for Crosslinked Polyethylene (PEX)Pipe for Gas Distribution Applications This standard is issued under the fixed designation F2968/F2968M;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 (e)indicates an editorial change since the last revision or reapproval. 1.Scope* 1.6 This international standard was developed in accor- 1.1 This specification covers outside diameter controlled dance with internationally recognized principles on standard- metric-sized and inch-sized black or yellow crosslinked poly- ization established in the Decision on Principles for the ethylene (PEX)pipe made in pipe dimension r...