It is a Pressurized external barrier fluid Circulation operating from a central pressure input source.

As flow rate is higher, it gives a better cooler efficiency. Used when operational area is at high risk i.e. Flammable, hazardous, toxic etc.

In Piping Plan 54, there is a pressurized external barrier fluid system supplying clean liquid to the barrier fluid seal chamber. Piping Plan 54 is used with Arrangement 3 liquid seals and the barrier liquid is maintained at a pressure greater than seal chamber pressure.

Barrier liquid is circulated by an external pump or pressure system. The design of the system including instrumentation, coolers, filters, and other components is outside the scope of this standard.

Piping Plan 54 is often used in services where the pumped fluid is hot, contaminated with solids, or the internal flow inducer is unable to supply a sufficient flow rate. If Piping Plan 54 is specified, carefully consider the reliability of the barrier liquid source. If the source is interrupted or contaminated, the resulting seal failures are very expensive to rectify. A properly engineered barrier liquid system is typically complex and often expensive.

Specification for Barrier Fluid System :
  • Design Pressure : 3000 psi
  • Reservoir Volume – 300 Liters with Vent & Drain
  • Complete Pump Assembly with Suction Filter.
  • ANSI ½” 300# Connections to Seal.
  • Air Cooled Heat Exchangers : Please refer to the API Plan 22, Plan 23 to heat exchanger details
Options & Accessories :
  • Hydrostatic Test
  • 10% / 100% Radiography Test
  • High Level Switch
  • Temperature Indicator
  • Temperature Transmitter
  • Pressure Transmitter
Material of Construction SS316/L
Welding Book (WPS, Weld map) ASME Sec. IX / EN 15614
Construction Code- Accumulator ASME Sec. VIII Div. 1
Construction Code- Piping ASME B31.3
Provisional Certification as applicable CE marking (PED 2014/68/EU) ASME U Stamp, ATEX API 682 Ed. 4th
Pressure Part Certificates EN 10204 Type 3.1 / 3.2
Structure Part Certificates EN 10204 Type 3.1 / 2.1 / 2.2
Orientation & Sizes Dimension Reports
NDE Testing Reports VT,LPT, RT, PMI, Ferrite etc
Leak test Reports Hydro / Pneumatic Test Report
Surface Cleaning Certificate Pickling passivation
Surface Coating Certificate Painting Report