Hot tapping, or pressure tapping, is the method of making a connection to an existing pipeline without the interrupting or emptying of that section of pipe. This means that a pipeline can continue to be in operation whilst modifications are being done to it. Hot Tapping can be completed on a variety of liquids including chilled, heating and condenser water as well as waste and potable water systems.
Hot Tapping Procedures Include:
- Bolt on a hot tap saddle, or welded stub, valve installed, tool assembly is pressure tested once hot tap machine attached.
- Valve opened, hot tap completed, coupon or cut portion retained by latches on pilot drill. Pressure is contained within the hot tapping machine.
- Cutter and coupon retracted, and valve closed. Fluid is drained and hot tapping machine is removed. The tapped valve is now ready for the contractor’s tie-in.