The Alabama Drydock and Shipbuilding Company carried out an extensive investigation on how to reduce their manual arc welding costs, comparing various semi-automatic and automatic processes against stick welding. The two best processes proved to be the 0.052-Uniflux-V-75 (E-70T-5 flux-cored wire), and the 0.035 Imperial-88 (E-70-6 solid MIG wire). The MIG process was 50-60% faster on plate than manual arc welding, and on pipe or plate with open gaps it was about 50% faster. The greatest savings in all-position welding of plate were achieved with the flux-cored wire, with speeds double those of manual welding. The investigation which, in effect, amounted to a cost reduction programme, involved the Company at all levels, namely top management, welding supervisors, welders, and fitter helpers. The first phase of personnel training consisted in training welding supervisors so that they could pass welder qualification tests for both the flux-cored and the MIG processes. Then each welder had to qualify. Other beneficial practices introduced included the use of deoxaluminate to paint the weld joints prior to fitting to prevent rust formation between fit-up and welding; the use of 3M weld back-up tape; and the employment of a welding foreman to maintain the welding equipment. In the Company's plate shop over 90% of the fabrication is now done with semi-automatic and automatic equipment. Order from BSRA as No. 49.023.

  • Corporate Authors:

    Gulf Publishing Company

    Box 2608
    Houston, TX  United States  77001
  • Publication Date: 1978-3

Media Info

  • Pagination: p. 54
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00182513
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Oct 31 1978 12:00AM