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MSS SP-129-2021Copper-Nickel Fittingsstandard by Manufacturers Standardization Society, 09/01/2021
MSS SP-68-2021High Pressure Butterfly Valves with Offset Designstandard by Manufacturers Standardization Society, 01/01/2022
MSS SP-81-2021Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends, Includes Errata (2022)standard by Manufacturers Standardization Society, 01/01/2022
MSS SP-140-2021Quality Standard Practice for Preparation of Valves and Fittings for Silicone-Free Servicestandard by Manufacturers Standardization Society, 01/01/2022
MSS SP-135-2021 Errata SheetErrata Sheet for High Pressure Knife Gate ValvesAmendment by Manufacturers Standardization Society, 03/24/2022
MSS SP-152-2022Knife Gate Valves for Double Block and Bleedstandard by Manufacturers Standardization Society, 04/01/2022
MSS SP-67-2022Butterfly Valvesstandard by Manufacturers Standardization Society, 07/01/2022
MSS SP-132-2022Compression Packing Systems for Instrument Valvesstandard by Manufacturers Standardization Society, 08/01/2022
MSS SP-104-2022Wrought Copper, Solder-Joint Pressure Fittingsstandard by Manufacturers Standardization Society, 12/01/2022
MSS SP-109-2022Weld-Fabricated, Copper Solder-Joint Pressure Fittingsstandard by Manufacturers Standardization Society, 12/01/2022
MSS SP-138-2023Quality Standard Practice for Oxygen Cleaning of Valves & Fittingsstandard by Manufacturers Standardization Society, 01/01/2023
MSS SP-117-2023Bellows Seals for Globe and Gate Valvesstandard by Manufacturers Standardization Society, 01/01/2023