Pipe tester plug

Details Pipe tester plug Pipe tester plug

1981-08-31

1983-05-03

Kazenske, Edward R.

Pipes and tubular conduits

With closures and plugs

Test plugs

73 495, F16L 5510

Patent

active

043818005

ABSTRACT:
A high pressure pipe tester plug for insertion into a pipe having a joint such as a weld to be tested includes a stem terminating in a fixed tapered washer, a plurality of grip segments arranged about the stem, an annular floating mandrel positioned about the stem and having an upper retaining section, a cylindrical section and a tapered entry section, an O-ring positioned in an internal recess of the floating mandrel and a ring-shaped seal, rectangular in cross section, positioned about the cylindrical section of the floating mandrel and retained by the upper retaining section. When tightened by a nut, the floating mandrel is forced into the top end of the grip segments, the washer is forced into the bottom end of the grip segments and the ring-shaped seal engages the pipe interior to isolate the joint to be tested.

REFERENCES:
patent: 2873764 (1959-02-01), Lombard et al.
patent: 3886977 (1975-06-01), Dorgebray
patent: 4114654 (1978-09-01), Richardson
patent: 4282982 (1981-08-01), Nuesslein

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