CAN/CSA-Z184-M92

1.1 Covers the design, fabrication, installation, inspection, testing, and safety aspects of the operation and maintenance of gas pipeline systems including gathering lines, transmission lines, compressor stations, metering and regulating stations, distribution lines, and service lines. 1 .2 The Scope of this Standard, as shown in Figure 1.1, includes the following: (a) gas storage vessels of the bottle-type or closed pipe-type fabricated or forged from pipe or fabricated from pipe and fittings, and gas storage lines; and (b) the conditions of use of the elements of the pipeline systems described in Clause 1.1, including, but not limited to, pipe, valves, fittings, flanges, bolting, gaskets, regulators, pressure vessels, pulsation dampeners, and relief valves. Note: Designers are cautioned that, while some sections apply to other gases, this Standard was prepared as a minimum standard for the design, construction, and operation of gas distribution and transmission systems as portrayed in Figure 1.1. 1 .3 This Standard does not apply to (a) design and fabrication of pressure vessels that are covered by appropriate pressure vessel codes; (b) piping with metal temperatures above 230 degrees C or below -70 degrees C; (c) piping beyond the outlet of the customer's meter set assembly;* *For such piping, see CAN/CGA-B149.1. (d) piping in oil refineries, natural gasoline extraction plants, gas treatment plants (except main gas stream piping in dehydration and all other processing plants installed as parts of gas pipeline systems), gas manufacturing plants, industrial plants, or mines; (e) vent piping for waste gases of any kind operating at or near atmospheric pressure; (f) wellhead assemblies, including control valves and casing and tubing in gas or oil wells; (g) proprietary items of equipment, apparatus, and instruments; (h) heat exchangers; (i) oil and liquid products pipeline systems; (j) prefabricated units that employ plate and longitudinal welds rather than pipe; (k) liquefied natural gas pipeline systems; and (l) offshore pipeline systems, except offshore compressor stations. 1.4 This Standard is intended to establish essential requirements and minimum standards for the design, installation, and operation of gas pipeline systems. It is not a design handbook and the need for exercising competent engineering judgement is a necessary requirement to be employed concurrently with its use. 1 .5 The requirements of this Standard shall be applicable to the operation, maintenance, and upgrading of existing installations; however, it is not intended that such requirements be applied retroactively to existing installations insofar as design, construction, and established operating pressures are concerned. 1 .6 Where any requirements of this Standard are at variance with the requirements of other standards or codes incorporated by reference into this Standard, the requirements of this Standard shall govern. 1 .7 It is not the intent of this Standard to prevent the development of new equipment or practices, or to prescribe how such innovations should be handled.