The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that SP-146-2019, High Pressure Knife Gate Valves: Iron and Ductile Iron, Lug-, Wafer- and Flange-Type, has been revised and published by MSS.
Standard Practice (SP)-146 covers requirements for high-pressure iron and ductile iron knife gate valve of the lug- wafer- and flange-type. This Standard Practice includes flanged body designs compatible with the following ASME standardized flanges: B16.1 Class 125 flanges for sizes NPS 2 (DN 50) through NPS 60 (DN 1500); B16.1 Class 250 flanges for sizes NPS 2 (DN 50) through NPS 48 (DN 1200); and B16.42 Class 150 and 300 flanges for sizes NPS 2 (DN 50) through NPS 24 (DN 600). SP-146 was originally developed in 2014, under the consensus of multiple MSS Technical Committees and currently maintained under the consensus of MSS Technical Committees 409, Knife Gate Valves (primary) and 106, Cast Iron Valves (secondary).
The revised Standard Practice, MSS SP-146-2019, is now available from MSS and authorized global distributors. It has been published in an electronic version (PDF) and in book format.