Controlled freeze seal for pipes

Details Controlled freeze seal for pipes Controlled freeze seal for pipes

1997-11-25

2000-03-28

Knight, Anthony

Seal for a joint or juncture

Seal between fixed parts or static contact against...

Contact seal for a pipe, conduit, or cable

277627, 277650, 138 32, 138 34, 374135, 374138, E03B 710

Patent

active

060421207

ABSTRACT:
Instead of applying the maximum cooling effect that can be produced, the method and apparatus disclosed applies only a carefully controlled cooling that is adequate to maintain the fluid in the pipe in a frozen condition but which maintains the temperature high enough to prevent damage to the metallurgical structure of the pipe. At the same time, the apparatus creates permanent documentation of the temperatures at selected stations along the pipe throughout the process, thereby providing proof that the pipe sustained no thermal damage.

REFERENCES:
patent: 3498071 (1970-03-01), Tremont
patent: 3943722 (1976-03-01), Ross
patent: 4267699 (1981-05-01), Bahrenbug

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