scope:

Specifies requirements for diaphragm valves with metallic shell materials. The range of nominal sizes covered is: - for flanged valves: sizes DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250 and DN300. - for screwed valves: sizes 1/4, 3/8, 1/2, 3/4, 1, 1.1/4, 1.1/2, 2, 2.1/2 and 3. - for weld end valves: sizes DN8, DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250 and DN300. The range of PN and Class designations covered is: - PN6, PN10, PN16 and PN25 - Class 150.