NEW TECHNIQUES FOR STAINLESS-STEEL FABRICATION DEVELOPED BY KOCKUMS FOR JOHNSON LINE'S 38,000-DWT CHEMICAL TANKERS

The laboratory at Kockums Shipyard, Malmo, was already engaged in investigating stainless-steel fabrication techniques when the yard received the order for the chemical tankers Johnson Chemstar and Johnson Chemsun its first major venture in stainless-steel fabrication. Consequently, many of the welding procedures had already been worked out. The article mentions some of the yard's production facilities, and briefly describes the fabrication and assembly of the ships' central tanks. The 28 central tanks in each ship are of various sizes, and were constructed of 316L-N stainless steel supplied by Avesta, a member of the AXEL Johnson Group. Wherever possible, submerged-arc welding was used, both for stainless-to-stainless joints and for joining stainless steel to the high-tensile steel used in the hull. Manual welding was carried out with high-efficiency electrodes that provide smooth running of the weld metal together with low spatter. The "stools", prefabricated by submerged-arc welding, were manually welded to each other and to the tank floor, and when this section had been moved to the assembly hall the corrugated tank-walls (another prefabricated section) were added. Ultrasonic testing was used in the inspection of the welded joints.

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  • Corporate Authors:

    IPC Industrial Press Limited

    Quadrant House, The Quadrant
    Sutton, Surrey,   England 
  • Publication Date: 1980-11

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Filing Info

  • Accession Number: 00331563
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM