Preventing Gas Leaks
A scenario of gas leaking slowly into a cavity wall or other enclosed space is very dangerous.
The gas leak may not be detected for some time and an explosion may occur if the gas quantity builds up and a source of ignition is present.
To prevent gas leaks the following points should be noted;
1. Gas pipes to run outside as much as possible.
2. Minimal joints in pipework.
3. Test pipes after installation for leaks.
4. If gas pipes have to run in an enclosed space install a Gas leak detection system with sensors, alarm and automatic gas shut off valve.
5. If gas pipes have to run in an enclosed vertical shaft install an extract fan so that the shaft is continuously fully vented.
6. Movement allowances should be made for Gas pipes laid in cement floor screeds.
7. Periodic checks (by competent person) to ensure there are no leaks.
8. Use correct pipes and jointing methods – MDPE (yellow plastic) underground, galvanised steel and copper above ground.
9. Most gas leaks occur at pipe joints. Ensure correct jointing method for pipe system such as fusion joints for large MDPE pipes, screwed joints for steel pipes and compression and capillary jointing methods for copper pipes.
Also Gas PTFE tape (thicker than normal) is used for screwed and compression fittings.
10. Gas installations to be installed by approved operatives (CORGI approved)
CORGI stands for Confederation for the Registration of Gas Installers.
CORGI was founded in 1970 to protect the public from the dangers of unsafe gas installations.
Registration is a legal requirement for anyone installing or repairing gas fittings or appliances.
CORGI is recognised as the
Approved installers only are allowed to work on gas installations.