On Site Piping Training
» Top side bolt tensioning
» Sub sea bolt tensioning
» Hydraulic torque wrench
» In Situ flange machining
» Cold cutting and beveling
» Hot Tapping and Plugging
» Pre-Commisioning
» Pipeline Pigging
» Testing service
On Site Piping Training

Hot Tapping and Stop Plugging


Hot Tapping or pressure tapping is the method of making a connection to existing piping or vessels while that existing system is under pressure. This method employs a drilling or tapping machine, a full-ported valve and a pressure-containing attached to the existing pressurized system. Connection to existing pipe is made through a full encirclement split tee, designed to contain system pressure and provide connector outlet. The drilling machine generally consists of a telescoping boring bar, mechanically driven, which advances a cutting tool. Usually a necessary element in the hot tap connection is the full-ported valve, which can become a control valve for the new connection, and allow the drilling machine to be removed after the cutting operation. Gate valves and other full-ported valves with flanged and screwed connection typically include 150# through 900# ANSI rating.