WET WELDING - A VIABLE TECHNIQUE?

Numerous research programmes in progress indicate a high degree of interest in wet welding. The Authors (of, respectively, Sea-Con Services and Trent Polytechnic) give an account of a series of tests on experimental welds, carried out under controlled conditions by experienced welder-divers, in order to assess wet welding and its suitability for a wider range of offshore applications than hitherto. MMA welds were deposited in accordance with Lloyd's Register approved procedures and AWS D3.6 (Type B) specifications; a ferritic electrode was used for welding mild-steel plate specimens, and a nickel-based electrode was used for welds in medium-strength steel plate. The welding was done in a 3m deep dive-tank. The experimental techniques are described, and the results of non-destructive examinations and of mechanical tests (bend, tensile, Charpy, CTOD, and hardness) are presented and discussed in some detail. It was concluded that the welds were of high integrity with acceptable mechanical properties, and that the investigation has shown that qualified personnel, using well-documented procedures, could produce wet welds suitable for an increased number of applications offshore. Lloyd's Register has deemed that the welds are suitable for certain applications on secondary structural members.

• Supplemental Notes:
  • Metal Construction, 18 (1986), p. 680 (Nov.) [6 pp., 10 ref., 8 tab., 5 fig., 7 phot.]
• Authors:
  • Cochrane, D J
  • Swetnam, D
• Publication Date: 1986

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00690971
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM