Codes & Standards - Purchase
ISO 28921-1:2022
Industrial valves — Isolating valves for low-temperature applications — Part 1: Design, manufacturing and production testing
SKU: iso_078445_178538
Published by ISO
Publication Year 2022
2 Edition
27 pages
Product Details
This document specifies requirements for design, dimensions, material, fabrication and production testing of gate, globe, ball/plug and butterfly valve design types used as isolation valves and check valves for low-temperature applications.
This document is applicable to isolation valves for use in low and cryogenic temperature service where the design low-temperature service is -50 °C down to –196 °C.
This document does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.
Where the requirements of this document vary from those given in the valve product standards, the requirements of this document apply.
This document is applicable to valves with body, bonnet, bonnet extension or cover made of metallic materials.
This document is applicable to:
— valves of nominal sizes DN: 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 650; 700; 750; 800; 850; 900; 950; 1 000; 1 050; 1 200; 1 350; 1 400; 1 500; 1 600; 1 650; 1 800,
— corresponding to nominal pipe sizes NPS: ?; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 26; 28; 30; 32; 34; 36; 38; 40; 42; 48; 54; 56; 60; 64; 66; 72,
and applies to pressure designations:
— PN 16; 25; 40; 100; 160; 250; 400,
— Class 150; 300; 600; 800; 900; 1 500; 2 500.
NOTE Not all type and size combination are available in all pressure ratings.
This document does not apply to safety valves and control valves.
This document is applicable to isolation valves for use in low and cryogenic temperature service where the design low-temperature service is -50 °C down to –196 °C.
This document does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.
Where the requirements of this document vary from those given in the valve product standards, the requirements of this document apply.
This document is applicable to valves with body, bonnet, bonnet extension or cover made of metallic materials.
This document is applicable to:
— valves of nominal sizes DN: 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 650; 700; 750; 800; 850; 900; 950; 1 000; 1 050; 1 200; 1 350; 1 400; 1 500; 1 600; 1 650; 1 800,
— corresponding to nominal pipe sizes NPS: ?; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 26; 28; 30; 32; 34; 36; 38; 40; 42; 48; 54; 56; 60; 64; 66; 72,
and applies to pressure designations:
— PN 16; 25; 40; 100; 160; 250; 400,
— Class 150; 300; 600; 800; 900; 1 500; 2 500.
NOTE Not all type and size combination are available in all pressure ratings.
This document does not apply to safety valves and control valves.