Piping Plans
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Plan 53A - Dual seals, pressurised - External reservoir pressurised liquid barrier
Piping PlansDescription: Plan 53A uses an external reservoir to provide barrier fluid for a pressurised dual seal arrangement ...
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Plan 53B - Dual seals, pressurised - Liquid barrier through a heat exchanger & pressurised by a accumulator
Piping PlansDescription: Plan 53B, previously termed 53 Modified, uses an accumulator to isolate the pressurizing gas from the barrier fluid ...
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Plan 53C - Dual seals, pressurised - Liquid barrier through a heat exchanger with differential pressure tracking piston accumulator
Piping PlansDescription: Plan 53C uses a piston accumulator to provide pressure to the system. It uses a reference line from the seal chamber to provide a constant pressure differential over the chamber’s pressure ...
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Plan 54 - Dual seals, pressurised - External pressurised barrier system / source
Piping PlansDescription: Plan 54 utilizes an external source to provide a clean pressurized barrier fluid to a dual seal.
Advantages: Can provide pressurized flow to multiple seal installations to reduce costs ...
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Plan 62 - Quench seals - External quench on atmospheric side of seal
Piping PlansDescription: Plan 62 is a common plan to improve the environment on the atmospheric side of single seals by quenching with steam, nitrogen or water ...
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Plan 65 - Single seals - External leakage detection reservoir
Piping PlansDescription: Plan 65 is a liquid leakage detection plan normally used for single seals. It utilizes a level switch on a reservoir to set off an alarm when excess leakage is detected ...
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Plan 72 - Secondary containment seals - Low pressure buffer gas injected to outer seal cavity
Piping PlansDescription: Plan 72 for secondary containment uses an external low pressure buffer gas, usually nitrogen, regulated by a control panel that injects it into the outer seal cavity ...
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Plan 74 - Dual gas seals - Pressurised barrier gas system for dual gas seals
Piping PlansDescription: Plan 74 provides a pres- surized gas, typically nitrogen, to dual gas seals through the use of a control panel that removes moisture, filters the gas, and regulates the barrier pressure ...
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Plan 75 - Secondary containment seals - With leakage collection reservoir
Piping PlansDescription: Plan 75 is a collection system used with secondary containment seals for process fluid that will condense at lower temperatures or is always in a liquid state ...
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Plan 76 - Secondary containment seals - Vented to flare or collection system
Piping PlansDescription: Plan 76 is a system to divert non-condensing primary seal leakage to a flare or vapor recovery system ...
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