Need help?

EN ISO 24664:2024 Standard

wave
Save  

  Keywords:

#pressure #refrigerating #document #valves #system

  Directive

Pressure equipment Directive (2014/68/EU)

  Last Official Journal reference

Friday 2nd of October 2026

  Description:

Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation (ISO 24664:2024)

  Purpose

This document describes the calculation of: —     mass flow for sizing pressure relief devices for parts of refrigerating systems; —     discharge capacities for pressure relief valves and other pressure relief devices in refrigerating systems including the necessary data for sizing these when relieving to atmosphere or to part of the refrigerating system at lower pressure; —     the pressure loss in the inlet and outlet lines of pressure relief valves and other pressure relief devices and includes the necessary data. This document specifies the requirements for selection of pressure relief devices to prevent excessive pressure due to internal and external heat sources, the sources of increasing pressure (e.g. compressor, heaters, etc.) and thermal expansion of trapped liquid. NOTE The term "refrigerating system" used in this document includes heat pumps.

  Publication

Friday 2nd of October 2026

  Related Standards

EN ISO 21922:2021/A1:2024

Pressure equipment Directive (2014/68/EU)

Refrigerating systems and heat pumps - Valves - Requirements, testing and marking (ISO 21922:2021)

EN 1092-3:2003

Pressure equipment Directive (2014/68/EU)

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

EN 13445-2:2021+A1:2023

Pressure equipment Directive (2014/68/EU)

Unfired pressure vessels - Part 2: Materials

EN 12952-16:2022

Pressure equipment Directive (2014/68/EU)

Water-tube boilers and auxiliary installations - Part 16: Requirements for grate and fluidized-bed firing systems for solid fuels ...

EN 12952-9:2022

Pressure equipment Directive (2014/68/EU)

Water-tube boilers and auxiliary installations - Part 9: Requirements for firing systems for pulverized solid fuels for the boiler

EN 12952-8:2022

Pressure equipment Directive (2014/68/EU)

Water-tube boilers and auxiliary installations - Part 8: Requirements for firing systems for liquid and gaseous fuels for the boil...

  Stay up to date

  ACCESS

Search for a standard
GO

Register

Already a member?
Login

  OTHER APPLICATIONS

If you are interested in DO160 tests, you can give a try to our other free of charge software:
CE-Marking assistant, Version: 1.3.0