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MSS SP - 44 2010 Steel Pipe line Flanges

ANS I / MSS SP-44-2016 Steel Pipeline Flanges


MSS SP-44 Practice covers pressure-temperature ratings ,materials, dimensions, tolerances, marking, and testing for steel pipeline flanges. The welding neck type flanges shall be forged  steel, and the blind flanges may be made from either forged steel or from steel plate.


Dimensional and tolerance requirements for NPS 10 and smaller are provided by reference to  ASME B16.5.


Flanges covered by this Standard Practice shall be designated as one of the following: Class 150, 300, 400, 600, or 900.