CSA B137.4:23

1 Scope 1.1 General This Standard covers polyethylene (PE) pipe, tubing, and fittings for use in gas mains and services, including gathering, transmission, and distribution of fuel gases containing not more than 1% aromatic hydrocarbons. 1.2 Fittings and connections This Standard covers all types of fittings and connections used in plastic gas pipe systems, including a) plastic-to-metal transition fittings; b) plastic component fittings (e.g., elbows, tees, end caps, and valves); and c) clamps and couplings. Notes: 1) In this Standard, “pipe” refers to pipe having IPS outside diameters and “tubing” refers to pipe having copper tube size outside diameters. 2) In this Standard, test requirements for pipe apply to both pipe and tubing. 1.3 Applicability to gas distribution systems This Standard specifies the manufacturing and testing requirements necessary to ensure that the PE compound, pipe, and fittings are of a quality acceptable for use in gas distribution systems. This Standard specifies requirements for a) primary properties of the compound; b) physical properties of the finished product; c) on-line monitoring during production; d) shipping and storage; and e) markings. Note: The user of the pipe, tubing, or fittings should refer to CSA Z662 for design and installation limitations of products covered by this Standard. 1.4 Terminology In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.