Standard

ASME B31.3

Revised

Note: This standard has a new edition: ASME B31.3

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Abstract

Content and Coverage This Code prescribes minimum requirements for the materials, design, fabrication, assembly, erection, examination, inspection and testing of piping systems subject to pressure or vacuum. Except as excluded in 300.1.4, this Code covers all piping within the property limits of facilities engaged in the processing or handling of chemical, petroleum, or related products. Examples are: a chemical plant, petroleum refinery, loading terminal, natural gas processing plant (including liquefied natural gas facilities), bulk plant, compounding plant, or tank farm. See Figure 300.1.1 for a diagram illustrating the scope of ANSI B31.3 piping. Piping for gases (including air) not now included within the scope of any existing Section of the Code shall be designed, fabricated, inspected and tested in accordance with the requirements of this Code when the piping is in plants, buildings and similar facilities not otherwise within the scope of this Code. Fluid Services This Code applies to piping systems handling all fluids, including fluidized solids, and to all types of service including raw, intermediate, and finished chemicals, oil and other petroleum products, gas, steam, air, water, and refrigerants, except as provided in 300.1.3 or 300.1.4. Only Category D and Category M fluid services as defined in 300.2 are segregated for special consideration. Refrigeration Unit Piping Package refrigeration unit piping shall be designed and constructed in accordance with ANSI B31.3 or ANSI B31.5 Exclusions This Code excludes the following: (a) Piping systems designed for internal gage pressures at or above zero but less than 15 psi (0.1 MPa), provided the fluid handled is non-tox.ic and not damaging to human tissue as defined in 300.2, and its design temperature is in the range of -20 F ( -29 C) to 360 F (182 C) inclusive; . (b) Those portions of steam, feedwater, blowoff, or other piping which are designed and con- 2 ANSI 831.3-1976 300(e) structed in accordance with ANSI B31.1 and are subject to ASME Code1 Section I inspection and stamping. (c) Tubes, tube fittings, and headers for fired heaters, including connections for external piping; (d) Pressure vessels, heat exchangers, pumps, and other fluid handling or process equipment, including internal piping and connections for external piping; (e) Piping located on company property which has been set aside for pipelines conforming to ANSI B31.4 or ANSI B31.8, or applicable governmental regulations; (f) Plumbing and sewers; (g) Fire protection systems constructed in compliance with insurance underwriters' or other recognized fire protection engineering standards.

Document information

  • Standard from ASME_AC
  • Published:
  • Version: 0
  • Document type: IS