Standard

MSS SP-165

Published

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Abstract

General This Standard Practice covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for forged steel slip-on and lap-joint flanges from NPS 26 through NPS 60. References Referenced Standards The standards and specifications incorporated by reference in this Standard Practice are shown in Annex D, for convenience of identifying edition number, date, and source of supply. A flange made in conformance with a prior edition of referenced standards or specifications and is in all other respects conforming to this Standard Practice, will be considered to be in conformance even though the edition referenced may have changed in a subsequent revision of this Standard Practice. Codes and Regulations A flange used under the jurisdiction of the ASME Boiler and Pressure Vessel Code (BPVC), the ANSI-approved Code for Pressure Piping, or Governmental Regulations, is subject to any limitation of that code or regulation. This includes any maximum temperature limitation for a material, or rule governing the use of a material at a low temperature. Relevant Units This Standard Practice states values in both SI (metric) and U.S. customary units. As an exception, diameter of bolts and flange bolt holes are expressed in inch units (U.S. customary) only. These systems of units are to be regarded separately as the standard and cannot be combined. Within the text, the U.S. customary units are shown in parentheses, combined tables, or in separate tables. The values and tolerances stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Except for diameter of bolts and flange bolt holes, combining values from the two systems constitutes non-conformance with the Standard Practice.

Document information

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