Pipe fitting for drilling

Details Pipe fitting for drilling Pipe fitting for drilling

1997-11-26

1999-11-02

Walton, George L.

Fluid handling

With repair, tapping, assembly, or disassembly means

Tapping a pipe, keg, or apertured tank under pressure

30 93, 285197, 408 87, F16K 4300, F16L 4106

Patent

active

059751177

ABSTRACT:
A pipe tapping valve which can be connected, for example by welding, with a pipe which is to be tapped, and which includes a support stub (4) in which a drill bit (26) is disposed for axial movement, and with which a branch nipple (12) is connected. The pipe tapping valve is configured so that the drilling of the tube can be safely performed with little difficulty, while a seal satisfying the requirements of the particular application is provided both during the drilling and after the drilling has ended. The support stub (4) has a substantially smooth cylindrical inside surface; the drill bit (26) contains at its upper free end an expansion (30) or a sealing ring (54) in contact with the inner surface (34) of the support stub (4), and the drill bit (26) is axially movable by means of a drilling tool (36) attachable to the support stub (4).

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