ISO 21922:2021 PDF

Scope: This document specifies safety requirements, certain functional requirements, and marking of valves and other components with similar bodies, hereinafter called valves, for use in refrigerating systems including heat pumps. This document includes requirements for valves with extension pipes. This document describes the procedure to be followed when designing valve parts subjected to pressure as well as the criteria to be used in the selection of materials. This document describes methods by which reduced impact values at low temperatures may be taken into account in a safe manner. This document applies to the design of bodies and bonnets for pressure relief devices, including bursting disc devices, with respect to pressure containment but it does not apply to any other aspects of the design or application of pressure relief devices. In addition, this document is applicable to valves with a maximum operating temperature not exceeding 200 °C and a maximum allowable pressure not exceeding 160 bar1).

ISO 21922:2021 Referenced Document

EN 12516-2 Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells*， 2021-09-30 Update
EN 13445-3 Unfired pressure vessels - Part 3: Design
EN 14276-2:2020 Pressure equipment for refrigerating systems and heat pumps - Part 2: Piping - General requirements
ISO 148-1 Metallic materials - Charpy pendulum impact test - Part 1: Test method
ISO 5149-1 Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1: Definitions, classification and selection criteria AMENDMENT 1: Correction of QLAV, QLMV
ISO/TR 15608 Welding - Guidelines for a metallic materials grouping system

2021 ISO 21922:2021 Refrigerating systems and heat pumps — Valves — Requirements, testing and marking