A STEALTHLIKE ISOLATION

摘要

Darran Pledger, STATS Group, UK, describes a recent double block isolation project in Scotland to allow a barred tee to be installed into the gas export pipeline. STATS Group was contracted by Px Limited to carry out a double block isolation of the Shetland Island Regional Gas Export (SIRGE) pipeline approximately 500 m outside the Shetland Gas Plant (SGP). The successful isolation of the 30 in. pipeline provided safe worksite conditions to allow a short section of line to be removed and a 30 in.×10 in. branched tee to be welded into the live pipeline.