Method for detecting breaches in heat exchanger tubing

Details Method for detecting breaches in heat exchanger tubing Method for detecting breaches in heat exchanger tubing

1992-06-15

1992-12-15

Ford, John K.

Heat exchange

Regenerator

Checker brick structure

165 111, 165 95, 73 40, 73 405R, 134 2, 134 3, 134 28, F28F 1100

Patent

active

051708400

ABSTRACT:
The inner-surfaces of heat exchanger tubing is cleansed with a sulfamic acid aqueous mixture and then subjected to a purplish-colored aqueous solution of potassium permangenate adapted to seep through to and become visually discernible at the heat exchanger tubing outer-surface to thusly visually indicate breach-faulted heat exchanger tubing. Any thusly inspected non-breach heat exchanger is purged with an oxalic acid aqueous solution and retained as acceptable for future re-use. The breach detecting method is generally applicable to all heat exchangers of the heat-conductive metallic tubing type, and, inter alia, specificaly applicable to dairy plate heat exchangers having metallic tubings.

REFERENCES:
patent: 3572085 (1971-03-01), Padko
patent: 3996062 (1976-12-01), Frost et al.
patent: 4162229 (1979-07-01), Loewenschuss
patent: 4243547 (1981-01-01), Molina
patent: 4476047 (1984-10-01), Bonnici et al.
patent: 4666528 (1987-05-01), Arrington et al.
patent: 4756768 (1988-07-01), Bertholdt et al.
patent: 4758366 (1988-07-01), Parekh

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