MSS SP-81-2021 Stainless-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-68-2021 High Pressure Butterfly Valves with Offset Design standard by Manufacturers Standardization Society, 01/01/2022
MSS SP-129-2021 Copper-Nickel Fittings standard by Manufacturers Standardization Society, 09/01/2021
MSS SP-6-2021 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings standard by Manufacturers Standardization Society, 09/01/2021
MSS SP-60-2021 Connecting Flange Joints Between Tapping Sleeves and Tapping Valves standard by Manufacturers Standardization Society, 07/01/2021
MSS SP-113-2021 Connecting Joints Between Tapping Machines and Tapping Valves standard by Manufacturers Standardization Society, 07/01/2021
MSS SP-112-2021 Quality Standard for Evaluation of Cast Surface Finishes - Visual and Tactile Method standard by Manufacturers Standardization Society, 07/01/2021