Basic Principles

The wall thickness of the object being tapped is to be determined ( 5 ). A split extraction connection ( 4 ) has to be gas-proof welded onto the main pipe. The welded joints have to be pressure tested. Onto the welded neck flange extraction connection a slide valve ( 3 ) has to be assembled.

.

Basic Principles of Hot Tapping

A special boring machine ( 1 ) is assembled onto the slide ( 3 ). The slide will be opened and the line boring ( 5 ) can begin. Afterwards the boring crown ( 2 ) will be driven back beyond the slider. The slider can be closed and the boring machine dismantled. A pressurized line or vessel has been integrated into a branch connection.