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2. Hot tapping - Wikipedia

   en.wikipedia.org/wiki/Hot_tapping

   Hot tapping, [1] [2] or pressure tapping, is the method of making a connection to existing piping or pressure vessels without the interrupting or emptying of that section of pipe or vessel. This means that a pipe or tank can continue to be in operation whilst maintenance or modifications are being done to it.

3. Cured-in-place pipe - Wikipedia

   en.wikipedia.org/wiki/Cured-in-place_pipe

   Sewage repairmen inserting uncured liner into a soon-to-be repaired pipe A cured-in-place pipe ( CIPP ) is a trenchless rehabilitation method used to repair existing pipelines. It is a jointless, seamless pipe lining within an existing pipe.

4. Line stopping - Wikipedia

   en.wikipedia.org/wiki/Line_stopping

   Other methods include the folding head line stop, which enters the pipe through a reduced branch hot tap; the Sure-Stop line stop, which intersects the pipe and does not seal inside the pipe like other methods; and the HTP, which is a high temperature, high pressure system that will stop the flow on existing pipes at operating temperatures ...

5. Tap Into These Pipelines to Pipe in Profits - AOL

   www.aol.com/2013/09/16/tap-into-these-pipelines...

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6. Trenchless technology - Wikipedia

   en.wikipedia.org/wiki/Trenchless_technology

   Sliplining, CIPP, and thermoformed pipe lining involve pulling or inverting a new liner into an existing pipe, then applying heat and/or pressure to force the liner to expand to fill the pipe. CIPP technologies combine a carrier (felt or fibreglass) impregnated with heat, ultraviolet light, or ambient curable resin to form a "pipe within a pipe".

7. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Pipe welding is often performed by specially licensed workers whose skills are retested periodically. For critical applications, every joint is tested with nondestructive methods. Because of the skills required, welded pipe joints are usually restricted to high-performance applications such as shipbuilding, and in chemical and nuclear reactors.