MSS SP 42:2013
MSS SP 42:2013 Corrosion-Resistant Gate, Globe, Angle, And Check Valves With Flanged And Butt Weld Ends (Classes 150, 300, & 600) Specifies Classes 150, 300, and 600 corrosion-resistant alloy gate, globe, angle, and check valves with flanged and butt weld ends which are constructed of pressure-containing parts, including materia