Seal Support System

API PLAN 65A,65B

Objective

Advantages

Leakage from single seal can be collected into a reservoir thereby keeping the environment clean
Compact in design
Leakage can be reused by the plant
Less expensive system
Detection of leakage system available to undergo planned maintenance.

Technical Features

It is a leakage detection piping plan normally used with arrangement 1 seals where seal leakage is expected to mostly liquid (not gas)
Piping is connected to the drain connection in the gland plate and directs any seal leakage through a reservoir and then through an orifice, exiting into an oil & water sewer or liquid collection system.
Excessive flow rates would be restricted by the orifice plate located downstream of the reservoir and leakage will be redirected to the reservoir and then through an orifice, exiting into an oil & water server or liquid collection system.
The orifice plate with bore diameter 5mm shall be located in the vertical pipe leg to avoid accumulation the fluid in the drain piping
A connection in the reservoir above the high level alarm is provided bypassing the orifice plate allowing excessive leakage to be effectively drained
. An optional pressure transmitter can be provided to allow for monitoring the pressure increase in the system
Most effective when used with a floating or segmented bushing or a containment device in the seal gland
The reservoir shall be mounted below the seal gland to allow leakage to flow to the reser voir
API Plan 65B is exactly some as API Plan 65A except that normally closed isolation valve is used in place of the orifice plate