ISO 4126-9:2008 Safety devices for protection against excessive pressure - Part 9: Application and installation of safety devices excluding stand-alone bursting disc safety devices
International Organization for Standardization (ISO)
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ISO 4126-9:2008
Scope
This part of ISO 4126 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. ISO 4126-6 covers the selection, application
and installation of bursting disc safety devices.
This part of ISO 4126 describes the normative requirements for applications and installations of safety devices
to protect static pressure equipment. The information contained in this part of ISO 4126 assumes single-phase
flow of the fluid discharged from the safety device. ISO 4126-10 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 ISO 4126 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.
ISO 4126-9:2008 Referenced Document
ISO 4126-6 Safety devices for protection against excessive pressure - Part 6: Application, selection and installation of bursting disc safety devices*, 2014-06-01 Update
ISO 4126-9:2008 history
2008ISO 4126-9:2008 Safety devices for protection against excessive pressure - Part 9: Application and installation of safety devices excluding stand-alone bursting disc safety devices