Attachment for sampling purge gas
AssigneeByron Barefoot
InventorByron G. Barefoot
Life of this patent
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Abstract
A pressure measuring device measures the pressure of a gas flowing in two pipes to be welded together at a joint. The device includes a collar having a groove formed therein and a pressure sensing device in fluid communication with the groove. The groove is formed to surround and seal a portion of the perimeter of the joint to be welded, while the collar is formed to surround and seal an additional portion thereof. Thus, the groove and the outer surface of the pipes to be welded defined a sealed cavity into which the flowing gas may leak. The pressure within this cavity is thus an indicator of the pressure of the flowing gas inside the pipe.
Claims20
A device for sampling the pressure of a gas flowing in axially aligned abutting pipe members to be welded together, said device comprising:
- a collar having a groove formed in an inner surface thereof, the groove formed to surround and seal a portion of a perimeter of a joint and said collar formed to surround and seal an additional portion of the perimeter of the joint, said groove and an outer surface of said pipe members defining a sealed cavity;
- and
- a pressure sensing device in fluid communication with said groove for measuring a pressure within said sealed cavity as an indication of the pressure of the gas flowing in the pipes.
A method for determining the pressure of a gas flowing in pipe members to be welded together at a joint, comprising the steps of:
- placing said pipes in axially aligned end-to-end abutment at the joint to be welded;
- forming a sealed cavity over only a portion of a perimeter of the joint to be welded;
- sealing a remaining portion of the perimeter of the joint to be welded;
- and
- measuring a pressure within said cavity as an indication of the pressure of the gas flowing in the pipe members.
Dependencies are inferred from the claim text.