ISO 28921-1:2022
Industrial valves — Isolating valves for low-temperature applications — Part 1: Design, manufacturing and production testing
Industrial valves — Isolating valves for low-temperature applications — Part 1: Design, manufacturing and production testing
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 27
- Дата публикации:
- 12 мая 2022 г.
- Издание:
- ISO IS 28921 edition 2 version 1
- ICS:
- 23.060.01
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: ⅜; 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.
Abstract
Overview - ISO 28921-1:2022 (Industrial valves for low‑temperature applications)
ISO 28921-1:2022 specifies design, manufacturing and production testing requirements for isolating and check valves used in low‑temperature services. It covers gate, globe, ball/plug and butterfly valve types with metallic bodies, bonnets, bonnet extensions or covers for service temperatures from −50 °C down to −196 °C. The standard is aimed at valves used in low‑temperature and cryogenic pipelines and systems (excluding cryogenic vessels covered by ISO 21011) and complements existing valve product standards where its requirements differ.
Key technical topics and requirements
- Valve types covered: gate, globe, ball/plug and butterfly valves used as isolation or check valves (safety and control valves excluded).
- Temperature range: design low‑temperature service from −50 °C to −196 °C.
- Materials and fabrication: requirements for metallic materials and acceptable internal non‑metallic components to ensure toughness and integrity at low temperatures.
- Design features: body/bonnet wall thickness, valve body extension and extended bonnet, stem design, seats and seating surfaces, provisions for internal pressure relief, operating means, electric continuity and fire‑safe considerations.
- Vapour column and insulation: definitions and requirements for body/bonnet extensions and vapour columns to keep operating mechanisms away from cold media.
- Testing: production testing including a low‑temperature test procedure (Annex A) and type testing requirements (referenced to ISO 28921‑2). Test gas is specified (minimum 97 % pure helium or nitrogen).
- Sizes and ratings: applies to nominal sizes DN 10 to DN 1800 (corresponding NPS range) and pressure designations PN 16–400 and Class 150–2500 (note: not all type/size/pressure combinations are available).
- Quality controls: sampling, lot acceptance, marking, labelling and packaging requirements for production shipments.
Practical applications and who uses this standard
ISO 28921‑1 is essential for:
- Valve manufacturers designing and producing valves for LNG, cryogenic processing, petrochemical and pipeline applications.
- Pipeline and process engineers specifying isolation valves for low‑temperature service.
- Procurement and QA teams validating vendor compliance, production testing and documentation.
- Maintenance and inspection groups ensuring correct valve selection and installation for safe isolation at low temperatures.
Practical benefits include improved reliability in low‑temperature isolation, consistent material selection and reproducible production testing to reduce field failures.
Related standards
- ISO 28921‑2 (Type testing for low‑temperature valves)
- ISO 21011 (valves for cryogenic vessels - excluded from ISO 28921‑1)
- ISO 5208 (pressure testing of metallic valves), ISO 10497 (fire testing), ASME B16.34 and other valve/flange standards referenced for complementary requirements.
Keywords: ISO 28921‑1:2022, industrial valves, low‑temperature valves, isolating valves, cryogenic valves, valve design, production testing, valve materials.
Технические детали
- Технический комитет
- ISO/TC 153 - Valves
- SKU
- ISO 28921-1:2022
Похожие стандарты
Стандарты, упомянутые в описании
BS ISO 21011:2008
ДействующийCryogenic vessels. Valves for cryogenic service.
BS EN ISO 28921-2:2017
ДействующийIndustrial valves. Isolating valves for low-temperature applications. Type testing.
ISO 5208:2015
ДействующийIndustrial valves — Pressure testing of metallic valves
Overview ISO 5208:2015 - Industrial valves - Pressure testing of metallic valves establishes standardized examinations and pressure-test procedures manufacturers must follow to verify the integrity o…