Pressure test with purge gas

For the pressure test on the Pressure control panel BU43FAC-2U, inert gas (non-reactive) gas is used (connect to HPI). Ensure that the required pressure is present and there is a valve present for shutting off the purge gas (PGI).

Before the test, close the PLI.

1. Open valve PGI to build up pressure in the system (1.5 bar).
2. Wait until the pressure has been built up and close the PGI valve.
3. Check whether the displays on PG P1 and PG P2 are identical. If the values do not match, check the pressure regulator setting and readjust via the pilot pressure if necessary.
4. Mark the displayed value on PG P1, and leave the pressure for 10 minutes.
5. After 10 minutes have elapsed, check that the values on PG P1 and PG P2 still match and whether the pressure has remained constant.
6. If there is no change, release the pressure control panel via VIV and close all valves.

If the pressure has reduced, perform a leak test to check where the gas is escaping, repair the connection and repeat the pressure test.

Connect the purge gas source on the HPI of the second supply line and repeat steps 1 to 6.

The line network can then be purged clear up to the consumer.