GB/T 32291-2015Offline inspection and evaluation of high and super-high pressure safety valves (English PDF)

3.1 verification requirements

Check should be consistent with GB/T 12241 and GB/T 12242 requirements.

3.2 calibration device

3.2.1

calibration device by the pressure supply systems, control systems, connection systems, pressure measuring system and observation system. include.

a) pressure supply system (by using the media points).

1) Pressure System. cylinders, compressors, oil, filter, low-pressure pump, high pressure pump and test containers;

2) Hydraulic system. a liquid storage vessels, low pressure pumps, high pressure pumps and test containers;

b) Control System. The console and valves;

c) connection system. fittings and pipes;

d) pressure measurement system. pressure measurement instruments and other;

e) observation system. video surveillance equipment.

3.2.2

calibration device configuration diagram showing See Appendix A.

3.2.3

the same pressure measurement system shall be equipped with two pressure measuring instruments, which range from 1.5 to 3.0 times the set pressure of the safety valve, precision

It should not be less than 1.6. Pressure measurement should be within the test duration.

3.3 calibration media

3.3.1

using the medium for gas (except flammable media external combustion) of the safety valve, setting pressure 42MPa ~ 100MPa range within (excluding

100MPa), check the media appropriate to air or nitrogen; the set pressure of not less than 100MPa, media should check nitrogen. Using the medium for hydrogen

Safety valve, calibration medium air, oxygen and other flammable combustion medium should be nitrogen.

3.3.2

using the medium for the safety valve of the liquid, with calibration medium is water or oil, the temperature should not be less than 5 °C. Austenitic stainless steel safety valve

When water for calibration, chloride ion content of the water should not exceed 25mg/L.