Efficiency process and apparatus for embrittling an outer...

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

B - Operations, Transporting

05

D

62/3, 32/31, 117

B05D 5/00 (2006.01) B05B 9/04 (2006.01) B05B 13/00 (2006.01) B05D 1/02 (2006.01) B05D 3/00 (2006.01)

Patent

CA 2029809

ABSTRACT OF THE DISCLOSURE 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. 65/jmw,kim

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