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BS ISO 10631:2013 Metallic butterfly valves for general purposes – 5 Year Review

What is it?:
This International Standard specifies requirements for design, materials (e.g. steel, cast iron, ductile iron, copper alloy), pressure/ temperature ratings and testing for butterfly valves having metallic bodies for use in general purpose flanged or butt welding piping systems.

This International Standard covers butterfly valves of the following nominal sizes, DN and NPS: — DN 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500 (550); 600 (650); 700; 750; 800; 900; 1 000; 1 200; 1 400; 1 600; 1 800; 2 000; 2 200; 2 400.

This International Standard is applicable to butterfly valves of the following pressure designations, PN and Class: — PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; — Class 125; 150; 300..

Why Is it Important?:
ISO 10631 was first published in 1994 and technically revised in 2013. BS EN 593:2018 which has an identical title will shortly be published. The scope of EN 593 has been amended to a) Extend the dimensions to cover PN 2,5 to PN 160, Class 150 to Class 900 and DN 20 to DN 4 000; b) Include single, double and triple eccentric designs.

Published in Valve User Magazine Issue 44


Winter 2018 // Issue 47
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