The standard explicitly excludes:
Note: This standard specifically excludes stand-alone bursting disc safety devices, which are covered in ISO 4126-6. 2. Scope and Application of the Standard Iso 4126-9 Pdf
is the international standard that establishes the normative requirements for the application and installation of safety devices designed to protect static pressure equipment against excessive pressure . Unlike other parts of the ISO 4126 series that focus on device manufacturing and sizing, Part 9 ensures that once a device is selected, it is installed in a manner that maintains its protective integrity. Scope and Exclusions Iso 4126-9 Pdf