BS EN 764-7:2002 Pressure equipment. Safety systems for unfired pressure vessels
BS EN 764-7 is a European Standard which specifies the requirements for safety systems which protect a vessel, a system of vessels, piping, accessories or assemblies from exceeding operating conditions.
It is also applicable to safety related indicators and alarms, signals and warning devices when used in safety systems.
The scope of BS EN 764-7 and its relationship to the safety accessories and other protective devices described in the Pressure Equipment Directive are shown in annex E.
Contents of BS EN 764-7:
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Risk consideration
4.1 General
4.2 Identification of hazards
4.3 Solutions
5 Limiting devices and systems
5.1 General
5.2 Design
6 Pressure limitation
6.1 General
6.2 Safety valves, direct loaded and pilot operated
6.3 Bursting disc safety devices
6.4 Safety Valves & bursting disc safety devices in series or parallel
6.5 Controlled safety pressure relief systems (CSPRS)
6.6 Safety related measuring, control & regulation systems (SRMCR)
7 Hazard protection
7.1 Internal
7.2 External
7.3 Static electricity
8 Installation of pressure relieving devices
8.1 General
8.2 Safety valves or the main valve of a CSPRS
8.3 Installation of bursting disc safety devices
8.4 Safety valve and bursting disc safety devices in combination
8.5 Isolation of relieving safety systems
9 Indicators and alarms
9.1 General
9.2 Pressure indicators
9.3 Temperature indicators
9.5 Signals and warning devices
10 Inspection and maintenance
Annex A (informative) Sizing of multiple safety valves
Annex B (normative) Requirements for level limiters
Annex C (informative) Selection of safety accessories for pressure limitation
Annex D (normative) Bursting disc safety devices downstream of safety valves
Annex E (informative) Scope of the standard
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives
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