What valves should be tested
Valves can be among the most critical components in any hydrocarbon process. They are also often required to function in the most extreme conditions. This is especially true of Blow Down or Emergency Shut Down (ESD) valves in LNG service and this facility provides the possibility to measure and verify the performance of such valve under cryogenic conditions using helium or nitrogen as a test gas.
Typical examples of the applications of cryogenic testing would be as follows:
- Type testing of prototype valves - usually consists of an extended and lengthy test program often applying the most stringent leakage rate criteria for type approval purposes.
- Acceptance testing of standard production valves representative samples (for example 1 of 10) of isolation and/or control valves are selected for test to an agreed procedure or recognized standard to confirm performance in accordance with the requirements of the intended applications.
- Depending on the duty, some critical valves may be subjected to 100% testing, which can also verify operating time at cryogenic temperatures.
- Assured performance of cryogenic valves and guaranteed trouble-free production in customers' process.
- Minimizes time wasted in trouble-shooting during plant start-up.
- Provides reliable on-time test records.
- Assures maximum safety during an inspection.
Cryo testing process
|Test temperatures:||-196 °C with liquefied nitrogen.
-150 - 0 °C with liquefied or gaseous nitrogen.
-79 - 0 °C with Dry Ice (CO2).
|Test pressures:||0 - 100 bar with Helium at temperatures below 0 °C.
0 - 180 bar with Helium at ambient.
0 - 180 bar with Nitrogen gas at ambient.
On request test pressures up to 200 bar are possible with nitrogen or helium.
|Valve sizes:||Ball valves ASME 150 - ASME 600, sizes up to 30”.
Butterfly valves ASME 150 - ASME 600, sizes 4” - 100”.