Hot tapping machines are used to drill into pressurized pipelines to add or replace main or service lines without interrupting flow. The hot tapping process permits the installation of new pipes, ...

This chapter deals with the selection, location, design, and construction of hot taps in piping systems. The emphasis is on hot taps using welded branch fittings, but there is a discussion on ...

Williams Cos. Inc., Tulsa, and three other companies have spent 4 years and about $5 million to conceive and design a diverless, deepwater hot-tapping system that will undergo full-scale testing this ...