Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1977-02-04
1979-05-08
Schwadron, Martin P.
Fluid handling
Processes
Cleaning, repairing, or assembling
29401C, 137315, 138 92, 138 94, 138 97, 285 3, F16l 5510
Patent
active
041530675
ABSTRACT:
A sacrificial top tap T and the method of using such a T to tap into a main supply pipe in such a manner that the T may ultimately be plugged and the greater portion thereof removed from the main supply pipe in such a manner as to protect the remaining T portion and the main supply pipe itself from potential damage. The Service T has an axial through bore and a lateral outlet with means near one end of the T for connecting the T to a main and means near the lateral outlet for connecting the T to a service line. Remote from the one end which connects to the service line may be located a sealing element and threads are provided inside the bore near the end which attaches to the main supply pipe for receiving an element for sealing that bore when the service line is to be disconnected. When disconnecting the service line, the Service T interior is sealed against the passage of material from the main and at a point close to the main. A portion of the Service T is severed from the main in a region more remote from the main than the point of sealing and the unsevered or remaining portion of the Service T is capped for example, by welding a cover over that unsevered portion and to the main. The above steps may be carried out while maintaining the pressure within the main above atmospheric pressure.
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Schwadron Martin P.
Walton G. L.
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