Short description
This Standard Practice covers the construction requirements for high pressure wafer- and flange-type 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).