MSS SP-146-2019涵盖了高压、凸耳式、对夹式和法兰式铸铁和球墨铸铁刀闸阀的施工要求。本标准实施规程涵盖了与以下ASME标准法兰兼容的法兰阀体设计:（a）B16。1.尺寸为NPS 2（DN 50）至NPS 60（DN 1500）的125级法兰；（b） B16。1个250级法兰，尺寸为NPS 2（DN 50）至NPS 48（DN 1200）；（c） B16。42尺寸为NPS 2（DN 50）至NPS 24（DN 600）的150级和300级法兰。

MSS SP-146-2019 covers the construction requirements for high pressure, lug-, wafer-, and flange-type iron and ductile iron knife gate valves.This Standard Practice covers flanged body designs compatible with the following ASME standardized flanges:(a) B16.1, Class 125 flanges for sizes NPS 2 (DN 50) through NPS 60 (DN 1500);(b) B16.1 Class 250 flanges for sizes NPS 2 (DN 50) through NPS 48 (DN 1200);(c) B16.42 Class 150 and 300 flanges for sizes NPS 2 (DN 50) through NPS 24 (DN 600).