This standard specifies the requirements and methods for valve fire resistance testing to verify the pressure-bearing performance of the valve during or after the fire resistance test. This standard does not apply to fire resistance testing of valve actuation devices other than manual gearboxes or similar devices in standard valve assembly components. Such driving devices (such as electric devices, pneumatic devices, or hydraulic devices) should have special protection measures during the test.
SY/T 6960-2013 Referenced Document
GB/T 1047-2005 Pipework components-Definition and selection of DN (nominal size)
GB/T 1048-2005 Pipework components-Definition and selection of PN