Hot Spot ISO/FDIS 10631

By BVAA’s Technical Consultant, Peter Churm

Published: 20th March 2013 | Issue 24 Share article:

ISO 10631 “Metallic butterfly valves for general purposes”

This International Standard has been modified according to the accepted DIS comments and has been submitted to ISO for launching Final Draft International Standard (FDIS) vote. It specifies requirements for the design, materials, (e.g. steel,cast iron, ductile iron, copper alloy), pressure-temperature ratings and testing of butterfly valves having metallic bodies for use in general purposes flanged or butt welding piping systems and used for general purposes.

This 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.

NPS 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; (22;); 24; (26;); 28; 30; 32; 36; 40; 48; 56; 64; 72; 80, 88, 96.

It is applicable to butterfly valves of the following nominal pressure designations, PN and Class:

PN 2,5; 6; 10; 16; 25; 40.

Class 125; Class 150; Class 300.

When published this standard will replace ISO 10631:1994 “Metallic butterfly valves for general purposes”

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