May 2004

Special Report: Maintenance/Reliability

Unique online leak repair techniques

Consider these options when typical methods aren't feasible

Akhtar, O., Fateh, P., Fauji Fertilizer Co.

Among the many problems that threaten daily operation of a chemical process plant, fluid leakage is perhaps the most common. A high-velocity jet emerging from a flange due to a failed gasket, a pinhole in an elbow, corroded threads of a level transmitter, etc., are familiar scenes that the maintenance crew encounters and must rectify. Conventionally, a bolted/ welded clamp with sealant injected under pressure would seal the leak, but once in a while a leak occurs that ? due to its difficult location or space constraints ? would initially appear ?impossible? to control. Such leaks must be stopped by using custom-developed solutions to avoid the unwelcome verdict of ?shutting down? the plant a

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