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eLibrary > BS EN ISO 24664:2024 - TC Tracked Changes. Refrigerating systems and heat pumps. Pressure relief devices and their associated piping. Methods for calculation >

BS EN ISO 24664:2024 - TC Tracked Changes. Refrigerating systems and heat pumps. Pressure relief devices and their associated piping. Methods for calculation, 2025

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BS EN ISO 24664:2024 - TC Tracked Changes. Refrigerating systems and heat pumps. Pressure relief devices and their associated piping. Methods for calculation, 2025

A-30431825.pdf [Go to Page]
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Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/68/EU (Pressure equipment Directive) aimed to be covered [Go to Page]
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General
6 Minimum required discharge capacity for protection of parts of a refrigerating system [Go to Page]
6.1 General
6.2 Excessive pressure caused by heat sources [Go to Page]
6.2.1 External heat sources
6.2.2 Internal heat sources
6.3 Excessive pressure caused by compressors
6.4 Excessive pressure caused by expansion of trapped liquid
7 Discharge capacity of pressure relief devices [Go to Page]
7.1 General
7.2 Discharge capacity of pressure relief valves
7.3 Discharge capacity of bursting discs
8 Pressure loss in inlet and outlet lines [Go to Page]
8.1 General
8.2 Pressure loss in inlet line
8.3 Pressure loss in outlet line
8.4 Total pressure loss
8.5 Connection of outlets from several pressure relief valves to a common outlet line
Annex A (normative) Values of factors and properties of refrigerants
Annex B (informative) Calculation of flow areas for non-flashing and flashing liquids
Annex C (informative) Example calculation for sizing pressure relief devices with corresponding pipes and fittings
Annex D (informative) Relief valve outlet line when velocity is higher than speed of sound
Bibliography [Go to Page]

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BS EN ISO 24664:2024 - TC Tracked Changes. Refrigerating systems and heat pumps. Pressure relief devices and their associated piping. Methods for calculation, 2025

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