Abstract

1.1 This Standard describes the calculation of mass flow for sizing pressure relief devices for components of refrigerating systems.NOTE The term "refrigerating system" used in this Standard includes heat pumps.1.2 This Standard describes the calculation of 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 components within the system at lower pressure.1.3 This Standard 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.1.4 This Standard describes the calculation of the pressure loss in the upstream and downstream line of pressure relief valves and other pressure relief devices and includes the necessary data.1.5 This Standard refers to other relevant standards in Clause 5.

Begin

2020-12-19

WI

00182092

Planned document number

DIN EN ISO 24664

Project number

04400337

Responsible national committee

NA 044-00-01 AA - Safety and environment protection  

Responsible european committee

CEN/TC 182/WG 2 - Design and testing  

Responsible international committee

ISO/TC 86/SC 1 - Safety and environmental requirements for refrigerating systems  

draft standard

Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation (ISO/DIS 24664:2021); German and English version prEN ISO 24664:2021
2021-04
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previous edition(s)

Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation; German version EN 13136:2013+A1:2018
2020-08

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