The company, which manages the gas distribution network for properties in Scotland and the south of England, already has 400 Transit Custom vehicles, and says the Custom's ability to carry 3m-long pipes was the deciding factor.
"This eliminates the need for our engineers to load heavy copper piping at higher than head height, so there is reduced potential for an accident," says Paul Davies, SGN fleet manager.
"These vans are on the go 24 hours a day, seven days a week, so they have not only to be economical, reliable and spacious, but also to provide a good working environment for operators."
SGN's has specified short-wheelbase, high-roof variants, equipped with a 2.2-litre TDCi 100bhp power unit.
They feature a bespoke stainless-steel racking system by converter Tevo, in addition to safety steps, additional lighting, load area heating and safe storage areas.