Further Studies on In-Place Cleaning

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Abstract
Sanitization immediately after cleaning did not improve the line sufficiently to warrant incorporation as a standard procedure. Eliminating the acid cleaner or reducing the circulation velocity to 4.8 feet /second did not decrease the efficiency of the cleaning process in this instance. Lowering the temperature of the nonionic alkaline cleaning solution to 120[degree] F produced an iridescent discoloration in the stainless pipeline. In-place cleaning of a conventional take-down pipeline which was converted to a permanent line was inefficient using paper gaskets; with rubber gaskets sanitization was accomplished but efficient operation of such a system is dependent on proper installation and maintenance. Proper pitch is of particular importance in maintaining converted lines in proper operation.