API Plan 52

Non pressurized buffer fluid circulation in outboard seal of a dual seal configuration through a seal system.

Neither process contamination occure Nor direct process leakage to atmosphere if used Plan 52 seal support system

In Piping Plan 52 there is an external reservoir providing buffer liquid for the outer seal of an Arrangement 2 seal. The buffer liquid shall be maintained at a pressure less than seal chamber pressure and less than 0.28 MPa (2.8 bar) (40 psi).

Buffer liquid is circulated to and from the reservoir by means of an internal circulating device. To maximize buffer liquid circulation, the piping losses should be minimized through the proper selection of pipe size, elimination of fittings, use of large radius bends, and reduction in the length of piping runs.

Piping Plan 52 works best with clean, nonpolymerizing, pure products that have a vapor pressure higher than the buffer system pressure. Leakage of higher vapor pressure process liquids into the buffer system will flash in the seal reservoir and the vapor can escape to the collection system.

    Options & Accessories :
    • Coil
    • Additional Stamps Characteristics
    Specification for Barrier Fluid System :
    • Flow Control Orifice: Restriction Orifice
    • Dimension Control: ASME
    • Compliance Certificate: ATEX 2014/34/EU
    • Stainless Steel Flanged Valves
    • 100% Hydro Test
    • 10% Radiography Test
    • 10% Liquid Penetrant Test
    Material of Construction SS316/L, As per client Req.
    Welding Book (WPS, Weld map) ASME Sec. IX / EN 15614
    Construction Code- Vessel ASME Sec. VIII Div. 1
    Construction Code- Piping ASME B31.3
    Provisional Certification as applicable CE marking (PED 2014/68/EU), ASME U Stamp, 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