MSS SP-137-2020

MSS SP-137-2020

Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components

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Details

MSS SP-137-2020 provides methods and acceptance standards for Positive Material Identification (PMI) of metal flanges, fittings, valves, and pressure boundary parts of valves and other piping components.
The instrumentation used for PMI testing covered by this Standard Practice shall be optical spectroscopy or X-ray fluorescence.
This Standard Practice is applicable to the identification process, at point of final inspection or in-process inspection during manufacturing.
The PMI test is for material grade identification only and does not substitute for a manufacturer's test report or a laboratory's chemical analysis.

Additional Info

Author Manufacturers Standardization Society of the Valve and Fittings Industry (MSS)
Published by MSS
Document type Standard
Theme /subgroups/53418
Number of pages 14
Replace MSS SP-137-2013,MSS SP-137-2007
Keyword MSS SP-137-2020