B137.4-99

1. Scope 1.1 This Standard provides requirements for polyethylene pipe, tubing, and fittings for use in gas mains and services, including gathering, transmission, and distribution applications, that carry fuel gases containing not more than 1% aromatic hydrocarbons. 1.2 This Standard also applies to all types of fittings and connections used in a plastic gas pipe system, including plastic-to-metal transition fittings, plastic component fittings such as elbows, tees, end caps, valves, etc, and clamps and coulings. Note: "Pipe" refers to pipe having IPS outside diameters. "Tubing" refers to pipe having copper tube size outside diameters. In this Standard, where there are test requirements for pipe, they apply to both pipe and tubing. 1.3 This Standard establishes the manufacturing and testing requirements necessary to ensure that the polyethylene compound, pipe, and fittings are of a quality acceptable for use in a gas distribution system. This Standard includes requirements for (a) primary properties of the compound; (b) physical properties of the finished product; (c) on-line monitoring during production; (d) methods of identification; and (e) shipping and storage. Note: The user of the pipe, tubing, or fittings should refer to CSA Standard Z662 for the design and installation limitations on the use of this product. 1.4 The values given in SI (metric) units are the standard. The values in parentheses are for information only.