scope:

In September 2012, IGEM published Edition 2 of IGEM/G/5 which supersedes Edition 1 published in 2006. The Standard covers gas supplies to buildings containing multiple domestic dwellings or a building containing both multiple domestic dwellings and commercial units. The supply of gas to multi-occupancy buildings presents additional considerations such as:

•the routing of upstream/downstream pipework

•locating meters and meter banks

•locating ECVs

•the requirements for protected shafts

•countering expansion and contraction of pipework

•pipe sizing and loading

•shared flue systems (see IGEM/UP/17)

•special safety measures (EFVs; FSDs)

Significant amendments have been made compared to the first Edition. These include:

•reviewed hierarchy for timber and traditionally constructed buildings

•revision of all Figures and new additional Figures

•reviewed location of electrical insulation fittings/couplings

•updated requirements for equipotential bonding

•additional requirements for isolation valves

•further emphasis with respect to gaining access to network pipelines for future maintenance

•requirements for energy centres

•new procedure for testing existing network pipelines.

IGEM/G/5 can be ordered online using the following link IGEM/G/5.