Efficiency process and apparatus for embrittling an outer protec

Details Efficiency process and apparatus for embrittling an outer protec Efficiency process and apparatus for embrittling an outer protec

1989-11-13

1990-10-16

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

62 62, 83 15, 83170, 118313, 156344, 156359, 156498, 156584, 225 935, 264 28, 4273983, B32B 3124

Patent

active

049632051

ABSTRACT:
A protective coating on a pipe is embrittled by enclosing a portion of the pipe in a body defining an annular space around the protective coating. A pressurized LN2 cryogen is expanded within this annular space for sufficient time to lower the temperature of both the protective coating and the underlying pipe to a temperature below the temperature of embrittlement of the coating. The LN2 is expanded so as to form elliptical patterns on the pipe surface.

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patent: 4491484 (1985-01-01), Williams
patent: 4627197 (1986-12-01), Klee et al.
patent: 4654107 (1987-03-01), Ritter

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