An FPSO is a floating production storage and off-loading installation that is installed on a modified oil tanker. Oil & gas raw materials are processed here, so that semi-finished products are transported to land after storage on board. This way, no raw products need to be shipped.

Due to the high design pressures (up to 310 barg), solutions have been devised to make the design suitable for this. To save valuable material (Duplex), smart and compact design is a must. For the 1st, 2nd and 3rd stage IGC suction coolers, the channels are one-piece forged headers with a cover plate. The tube plate and channel are therefore 1 integral part. A special high-pressure seal (TEMA type D) has been designed for the discharge cooler, whereby the seal is realized by the internal pressure that presses a piston that fits into a graphite ring with very close tolerances. This seals the construction. In order to design thermally efficient and to remain compact, F-shells are designed to achieve pure countercurrent and the highest possible LMTD.

All coolers have a two-pass shell, and a removable u-bundle with horizontal longitudinal bulkhead and a channel integral with the tubesheet. TEMA types CFU (DFU for the discharge cooler) Tubes and tubesheets in Duplex, hulls C-steel, designed and built according to ASME VIII Div.1, TEMA R, API 660, and purchased by ABS (American Bureau of Shipping)