BS ISO 4126-9:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Risk consideration
5 Pressure limitation
  5.1 General
  5.2 Setting of safety devices
6 Inlet line
7 Outlet line
8 Installation
  8.1 General
  8.2 Installation of safety valves or the main valve of
      a CSPRS or a POSV
  8.3 Installation of safety valves and bursting disc safety
      devices in series or parallel
  8.4 Isolation of safety devices
9 Lifting device
Annex A (informative) - Safety device applications
Annex B (informative) - Sizing of multiple safety devices
Annex C (informative) - Sizing of inlet lines
Annex D (informative) - Calculation of built-up back pressure
Annex E (informative) - Calculation of reaction forces
Annex F (informative) - Calculation of noise level
Bibliography

Describes the application and installations of safety devices such as safety valves, safety valves and bursting disc safety devices in combination, pilot-operated safety valves and controlled safety pressure-relief systems for the protection of pressure equipment.

This part of ISO4126 covers the application and installations of safety devices such as safety valves, safety valves and bursting disc safety devices in combination, pilot-operated safety valves and controlled safety pressure-relief systems for the protection of pressure equipment. ISO4126-6 covers the selection, application and installation of bursting disc safety devices.

This part of ISO4126 describes the normative requirements for applications and installations of safety devices to protect static pressure equipment. The information contained in this part of ISO4126 assumes single-phase flow of the fluid discharged from the safety device. ISO4126-10 provides guidance specific to two-phase flow conditions.

Equipment connected together in a system by piping of adequate capacity, which is free from potential blockages and does not contain any valve that can isolate any part, can be considered to be a safety system for the application of pressure relief.

This part of ISO4126 does not deal with other safety devices, such as safety related monitoring, control and regulation devices and other limiting devices allowed by some national regulations.