API PLAN 65

In this plan a vessel with a high level alarm is provided for detection of excess leakage. Leakage from seal faces is directed to a liquid collection system.

Plan 65 A utilizes a level transmitter fitted to the reservoir to trigger an alarm on excessive leakage and includes a loop to bypass an orifice whereas Plan 65B also uses a level transmitter, but to alarm when the reservoir is full, and includes a loop to bypass an isolation valve.

In Piping Plan 65A there is an atmospheric leakage collection and detection system for condensing leakage.

Failure of the seal will be detected by an excessive flow rate into the leakage collection system. This plan is used when pumped fluid condenses at ambient temperatures. Piping Plan 65A is most effective when used with a floating or segmented bushing or containment device in the seal gland. The reservoir shall be mounted below the seal gland to allow leakage to flow to the reservoir.

In Piping Plan 65B there is an atmospheric leakage collection and detection system for condensing leakage. Failure of the seal will be detected by a cumulative. Piping Plan 65B is most effective when used with a floating or segmented bushing or containment device in the seal gland. The reservoir shall be mounted below the seal gland to allow leakage to flow to the reservoir.