ASME B31.8-2007 pdf download

ASME B31.8-2007 pdf download.Gas Transmission and Distribution Piping Systems.
801 GENERAL 801.1 Standards and Specifications 801.11 Standards and specifications approved for use under the Code and the names and addresses of the sponsoring organizations are shown in Appendix A. It is not considered practicable to refer to a specific edition ofeachofthe standards and specificationsinthe individ- ual Code paragraphs. 801.12 Use ofStandards and Specifications Incorpo- rated by Reference. Some standards and specifications cited in Appendix A are supplemented by specific requirements elsewhere in this Code. Users of this Code are advised against attempting direct application of any of these standards without carefully observing the Code’s reference to that standard. 801.2 Standard Dimensions Adherence to American National Standards Institute (ANSI) dimensions is strongly recommended wherever practicable. Paragraphs or notations specifying these and other dimensional standards in this Code, however, shall not be mandatory, provided that other designs of at least equal strength and tightness, capable of with- standing the same test requirements, are substituted. 801.3 SI (Metric) Conversion Forfactors used inconverting Englishunits to SI units, see Appendix J. 802 SCOPE AND INTENT 802.1 Scope 802.11 This Code covers the design, fabrication, installation, inspection, and testing of pipeline facilities used for the transportation of gas. This Code also covers safety aspects of the operation and maintenance of those facilities. 1 802.12 This Code does not apply to (a) design and manufacture of pressure vessels cov- ered by the BPV Code 1 (b) piping with metal temperatures above 450°F or below −20°F (For low temperature within the range cov- ered by this Code, see para. 812.) (c) piping beyond the outlet of the customer’s meter set assembly (Refer to ANSI Z223.1 and NFPA 54.) (d) piping in oil refineries or natural gasoline extrac- tion plants, gas treating plant piping other than the main gas stream piping in dehydration, and all other pro- cessing plants installed as part of a gas transmission system, gas manufacturing plants, industrial plants, or mines (See other applicable sections of the ASME Code for Pressure Piping, B31.) (e) ventpipingto operateatsubstantiallyatmospheric pressures for waste gases of any kind (f) wellhead assemblies, including control valves, flow lines between wellhead and trap or separator, off- shore platform production facility piping, or casing and tubing in gas or oil wells. (For offshore platform produc- tion facility piping, see API RP 14E.) (g) the design and manufacture of proprietary items of equipment, apparatus, or instruments (h) the design and manufacture of heat exchangers (Refer to appropriate TEMA 2 Standard.) (i) liquid petroleum transportation piping systems (Refer to ASME B31.4.) (j) liquid slurry transportation piping systems (Refer to ASME B31.11.) (k) carbon dioxide transportation piping systems (l) liquefied natural gas piping systems (Refer to NFPA 59A and ASME B31.3.)
803.22 Distribution System 803.221 Low-pressure distribution system is a gas distribution piping system in which the gas pressure in the mains and service lines is substantially the same as that delivered to the customer’s appliances. In such a system, aservice regulatoris notrequired ontheindivid- ual service lines. 803.222 High-pressure distribution system is a gas distribution piping system that operates at a pressure higher than the standard service pressure delivered to the customer. In such a system, a service regulator is required on each service line to control the pressure delivered to the customer. 803.223 Gas main or distribution main is a segment of pipeline in a distribution system installed to convey gas to individual service lines or other mains. 803.224 Gas service line is the piping installed between a main, pipeline, or other source of supply and the meter set assembly. [See para. 802.12(c).] 803.23 Gathering system is one or more segments of pipeline, usually interconnected to form a network, that transports gas from one or more production facili- ties to the inlet of a gas processing plant. If no gas processing plantexists, the gas is transported to the most downstream of (1) the point of custody transfer of gas suitable for delivery to a distribution system, or (2) the point where accumulation and preparation of gas from separate geographic production fields in reasonable proximity has been completed.