This paper describes an underwater welding process which has been under development since 1968. The process permits the welder/diver to work in-the-wet while the actual welding is performed in a dry gaseous environment using a specially-developed portable miniature habitat. The actual welding, utilizing a metal-inert-gas (MIG) process, consistently produces API1104 code welds in all welding positions in a large range of steel types and grades. Early and recent welding developments (including the Hydroweld concept) are summarized. Specific components of the Hydroweld equipment are described and illustrated. Surface and joint preparation and welding procedure for the underwater environment are discussed. Field examples include successful welds which have been made to depths of 95 feet. Possible applications include new construction and repair of virtually any subsea structure with surface-quality welding. The authors state that the process could possibly be adapted to aluminum and any other weldable material.

Media Info

  • Features: References;
  • Pagination: p. 515-526
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00054197
  • Record Type: Publication
  • Source Agency: National Maritime Research Center, Galveston
  • Report/Paper Numbers: OTC No. 1783
  • Files: TRIS
  • Created Date: May 7 1974 12:00AM