ISO 21012:2018 PDF

Cryogenic vessels — Hoses

Название (английский):

ISO 21012:2018

Cryogenic vessels — Hoses

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 16 марта 2018 г.
Издание:: ISO IS 21012 edition 2 version 1
ICS:: 23.020.40

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Описание (английский):

ISO 21012:2018 specifies design, construction, type and production testing, and marking requirements for non-insulated cryogenic flexible hoses used for the transfer of cryogenic fluids within the following range of operating conditions: - working temperature: from −270 °C to +65 °C; - nominal size (DN): from 10 to 100. End fittings for mounting of any couplings are within the scope of this document, but the couplings are subject to other standards. ISO 21012:2018 is intended that the hose be designed and tested to satisfy the generally accepted rated pressure i.e. at least PR 40. Hoses may be then selected with a PR equal to or greater than the maximum allowable pressure (PS) of the equipment to which it is to be used.

Технические детали

Технический комитет: ISO/TC 220 - Cryogenic vessels
SKU: ISO 21012:2018

Abstract

Overview

ISO 21012:2018 - Cryogenic vessels - Hoses specifies requirements for the design, construction, testing and marking of non‑insulated flexible hoses used to transfer cryogenic fluids. It applies to hoses with nominal sizes DN 10 to DN 100 and an operating temperature range from −270 °C to +65 °C. The standard is intended to ensure hoses are designed and tested to satisfy a generally accepted rated pressure (PR) - typically PR ≥ 40 - and that selected hoses have PR equal to or greater than the maximum allowable pressure (PS) of the equipment they serve.

Key topics and technical requirements

Scope and sizing: Covers non‑insulated flexible cryogenic hoses for DN 10–100, −270 °C to +65 °C.
Design & construction: Corrugated metal, elastomer or plastic inner tubes; braids (usually stainless steel or high‑strength copper alloys); end fittings to provide a tight, robust seal and restraint against elongation. Couplings are outside this standard’s scope.
Materials & compatibility: Materials must be compatible with conveyed fluids and retain ductility at rated minimum temperatures (see ISO 21028‑1). Special notes:
- Austenitic stainless steel hoses for hydrogen service shall be annealed after formation.
- Alloys and solders for acetylene mixtures shall contain less than 65% copper.
Cleanliness: Internal cleanliness required per ISO 23208 to remove hydrocarbons, moisture and particles before service.
Pressure & mechanical performance:
- Test pressure used in type/production tests shall be ≥ the hose PR.
- Burst pressure ≥ 3 × PR (failure should occur in hose body, not connections).
- Minimum cyclic life: 10,000 pressure cycles from

Overview

Key topics and technical requirements

Scope and sizing: Covers non‑insulated flexible cryogenic hoses for DN 10–100, −270 °C to +65 °C.
Design & construction: Corrugated metal, elastomer or plastic inner tubes; braids (usually stainless steel or high‑strength copper alloys); end fittings to provide a tight, robust seal and restraint against elongation. Couplings are outside this standard’s scope.
Materials & compatibility: Materials must be compatible with conveyed fluids and retain ductility at rated minimum temperatures (see ISO 21028‑1). Special notes:
- Austenitic stainless steel hoses for hydrogen service shall be annealed after formation.
- Alloys and solders for acetylene mixtures shall contain less than 65% copper.
Cleanliness: Internal cleanliness required per ISO 23208 to remove hydrocarbons, moisture and particles before service.
Pressure & mechanical performance:
- Test pressure used in type/production tests shall be ≥ the hose PR.
- Burst pressure ≥ 3 × PR (failure should occur in hose body, not connections).
- Minimum cyclic life: 10,000 pressure cycles from

ISO 21012:2018 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

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