DANSK DSF/PREN ISO 15761 PDF

This document specifies the requirements for a series of compact steel gate, globe, and check valves for petroleum and natural gas industry applications. It is applicable to valves of – nominal sizes DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80 and 100, – corresponding to nominal pipe sizes NPS ¼, ⅜, ½, ¾, 1, 1¼, 1½, 2, 2½, 3 and 4, – pressure designations PN 16, 25, 40, 63, 100, 250 and 400, – pressure designations Class 150, 300, 600, 800, 1 500 and 2 500. Class 800 is not a listed class designation, but is an intermediate Class number widely used for socket welding and threaded end compact valves covered by this standard. There is no equivalent PN designation. It includes provisions for the following valve characteristics: – outside screw with rising stems (OS & Y): in sizes 8 ≤ DN ≤ 100; – inside screw with rising stems (ISRS): in sizes 8 ≤ DN ≤ 65 with a pressure designation PN ≤ 100 or Class ≤ 800; – socket welding or threaded ends: in sizes 8 ≤ DN ≤ 65; – flanged or butt-welding ends excluding flanged end Class 800; – bonnet joint construction that is bolted, welded or threaded with seal weld; – bonnet joint construction that uses a union nut with a pressure designation PN ≤ 45 or Class ≤ 800; – body seat openings; – materials: as specified; – testing and inspection.