Gas Main Purging And Commissioning

Magma Energy Services Ltd carries out Gas Main Purging and Gas Main Commissioning.

Safe Gas Main Purge
First the gas main or leg is disconected at source, capped off and made safe. If the meter is removed it should be capped and made safe also.. The final end of the gas main or leg should be identified. A carefull investigation of site may need to be carried out to identify additional T's from the main.

The destination end is connected to the purge point shown above by flexible hose. The source of the main is connected to the Purge Fan. Operative use 2 Way Radio to communicate.

When the fan is turned on fresh air is forced down the gas main which begins to purge the gas from the pipe. The gas flows out of the gas main, down the hose, through the purge rig and into the atmosphere.

A gas analyser shows the level of gas in the purging mixture. When the mixture reads only oxygen, the main is purged and can safely be removed. A special procedure applies to mains with T's to ensure 100% gas removal.

The flare point is an approved flare and can support safe burning of the gas should the discharge become ignited.

Commissioning
Purging requires an accurate measurement of the volume of the gas main to be commissioned.

When the new gas main has been connected and pressure tested, the purge equipment is connected to the main. The volume flow meter on the purge kit is reset and the gas is turned on.

The main is safely purged until the volume of air in the main is replaced with gas, hence the need to identify the volume before starting work.

The gas analyser can be used to confirm that the purge of air.

Certification
Our Gas Safe operatives will issue Gas Safe paperwork to declare a safe gas main and provide Gas Safe commissioning paperwork for new installations.

Health & Safety
We have an excellent Health & Safety record and can provide high quality Health & Safety files including Site Specific Risk Assessments and Method Statements for all our works. We carry a full range of safety signage and barrier.

Construction Site Safety
Gas Operatives hold CSCS cards for easy site access.

Tuesday 1st November 2011
Philip Hamer
Magma Energy Services Ltd