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Protective Coatings
A set of Box Cooler manufactured by Nederlandse Radiateuren Fabriek ( NRF ) installed in the aft portside sea chest of a vessel .
After an initial inspection , the vessel owner decided to only carry out pressure washing of the box coolers and the results were very good . The marine growth was not only less than expected due to the hydrophobic surface , but any barnacles etc . present were easily removed . Further inspection showed minimal mechanical damage which was largely caused by routine handling of the box coolers during service . Furthermore , neither the Marine Growth Prevention System ( MGPS ), an Impressed Current Anti Fouling ( ICAF ) System , nor erosion had any negative effect on the coating . The mechanically damaged areas were duly repaired and the box coolers returned to service , reducing an initially planned 21-day schedule to an impressive 8 days . Another vessel with Säkatonit-coated box coolers was drydocked in January 2023 in Brazil . The coolers were re-coated in the United States in early 2018 and the vessel later operated in the warmer waters of coastal Brazil . Same as in November 2022 in Denmark , the box coolers inspected in Brazil showed an equally good result after 5 years of service .
About the author
Christoph Fischer-Zernin is Commercial Director of SÄKAPHEN , a 3rd generation family business renowned for its internal linings , especially for internal and external coating of heat exchangers . Christoph ’ s professional experience reaches from international sales and technical consultancy to lining inspection and application supervision of own products . He has experience in lining related technical consultancy as well as material composition , application technologies and procedures . He is also acquainted with laboratory related testing procedures . As trained NACE CIP Level 2 , he is experienced in failure analysis concerning internal linings .
U-tube Heat exchanger ’ s tubes bundles
UBHT JOULE EFFECT MACHINES Machines for U-tube stress relieving heat treatment and reduction of hardness after cold bending .
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SunTec
HEATING SYSTEMS
CARTRIDGE HEATERS FOR AIR-COOLER Inox tubular resistances for the PWHT of “ tube-tubesheet ” weldings in AIR-COOLER heat exchangers .
CERAMIC HEATING ELEMENTS For the pre-heating and PWHT of joint welding .
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