April 20, 2015
Due to potential leakage, it was necessary to replace two 3” steel gas service risers in a block of some 35 flats at the point where they entered the building. To avoid disrupting residents’ gas supply, with the subsequent need to test, purge and relight each dwelling, it was decided to carry out the operation live using Live Riser Transfer. This technique allows a gas riser to be partly...