ISO 10631:2021 Industrial valves - Metallic butterfly valves

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Industrial valves - Metallic butterfly valves

1 Scope

This document specifies the general 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 flanged or butt-welding piping systems.

This document applies to metallic butterfly valves used for all industrial applications.

Additional requirements given in the relevant application standards can apply to butterfly valves used for more specific applications (e.g. for the water industry, the chemical and petrochemical process industry, the oil and gas industry). This document 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; 1 050; 1 200; 1 400; 1 500; 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; 42; 48; 54; 56; 60; 64; 66; 72; 78; 80; 84; 88; 90; 96.

This document 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; PN 63; PN 100;

— Class 25, 125; 150; 250; 300; 600.

NOTE 1 It is possible that the nominal sizes listed are not available for all pressure designations.

NOTE 2 Nominal sizes listed in parenthesis are not common industry sizes, but are used in some application standards.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 185, Grey cast irons — Classification

ISO 1083, Spheroidal graphite cast irons — Classification

ISO 4991, Steel castings for pressure purposes

ISO 5208, Industrial valves — Pressure testing of metallic valves

ISO 5209:2019, General purpose industrial valves — Marking

ISO 5211, Industrial valves — Part-turn actuator attachments

ISO 5752, Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions

ISO 5922, Malleable cast iron

ISO 7005-3, Metallic flanges — Part 3: Copper alloy and composite flanges

ISO 9327-1, Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 1: General requirements

ISO 9327-2, Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 2: Non-alloy and alloy (Mo, Cr and CrMo) steels with specified elevated temperature properties

ISO 9327-3, Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 3: Nickel steels with specified low temperature properties

ISO 9327-4, Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 4: Weldable fine grain steels with high proof strength

ISO 9327-5, Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 5: Stainless steels

ISO 9328-1, Steel flat products for pressure purposes — Technical delivery conditions — Part 1: General requirements

ISO 9328-2, Steel flat products for pressure purposes — Technical delivery conditions — Part 2: Non-alloy and alloy steels with specified elevated temperature properties

ISO 9328-3, Steel flat products for pressure purposes — Technical delivery conditions — Part 3: Weldable fine grain steels, normalized

ISO 9328-4, Steel flat products for pressure purposes — Technical delivery conditions — Part 4: Nickel-

alloy steels with specified low temperature properties

ISO 9328-5, Steel flat products for pressure purposes — Technical delivery conditions — Part 5: Weldable fine grain steels, thermomechanically rolled

ISO 10497, Testing of valves — Fire type-testing requirements

ISO 14737, Carbon and low alloy cast steels for general applications

EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges

EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 2: Cast iron flanges

EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 3: Copper alloy flanges

EN 12516-1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells

EN 12516-2, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells

EN 12516-4, Industrial valves — Shell design strength — Part 4: Calculation method for valve shells manufactured in metallic materials other than steel

ASME B1.1, Unified Inch Screw Threads, (UN and UNR Thread Form)

ASME B16.1, Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250

ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard

ASME B16.24, Cast Copper Alloy Pipe Flanges, Flanged Fittings, and Valves: Classes 150, 300, 600, 900, 1500, and 2500

ASME B16.34, Valves Flanged, Threaded, and Welding End

ASME B16.42, Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and 300

ASME B16.47, Large Diameter Steel Flanges: NPS 26 through NPS 60 Metric/Inch Standard

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