NEN EN 764-7 : 2002 C2 2007

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 and bursting disc safety devices in series
      or parallel
  6.5 Controlled safety pressure relief systems (CSPRS)
  6.6 Safety related measuring, control and 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
  9.4 Liquid level 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
      B.1 General
      B.2 Floating devices
      B.3 Level electrode devices
      B.4 Fault detection
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
Bibliography

Specifies the requirements for safety systems which protect a vessel, a system of vessels, piping, accessories or assemblies from exceeding operating conditions. Also applicable to safety related indicators and alarms, signals and warning devices when used in safety systems.