SAFE WELD HARDNESS LEVELS TO INSURE LONG SERVICE LIFE IN OFFSHORE PIPELINES

An automatic welding operation to be used in constructing an offshore pipeline was found to produce cap pass heat-affected zones having hardness of Rc35-37, whereas manual welding gives maximum hardness of about Rc15-20, with occasional maximums of Rc26-27. To insure long service life without costly repairs due to stress corrosion or sulfide cracking, a hardness limit was set at Rc32 for the cap pass heat-affected zone.

• Supplemental Notes:
  • Presented at the 4th AIME & Society of Petroleum Engineers Offshore Technology Annual Conference, Houston, Texas, May 1-3, 1972.
• Corporate Authors:

  Offshore Technology Conference (4th)

  6200 North Central Expressway
  Dallas, TX  United States  75206
• Authors:
  • Vennett, R M
• Conference:
  • Presented at the 4th AIME & Society of Petroleum Engineers Offshore Technology Annual Conference, Houston, Texas, May 1-3, 1972.
• Publication Date: 1972

Media Info

• Pagination: p. 587-594
• Serial:
  • Issue Number: 1

Subject/Index Terms

• TRT Terms: Construction; Pipelines; Specifications; Underwater pipelines; Welding; Welds
• Old TRIS Terms: Pipeline construction; Weld properties
• Subject Areas: Construction; Marine Transportation; Pipelines; Terminals and Facilities;

Filing Info

• Accession Number: 00056172
• Record Type: Publication
• Source Agency: American Petroleum Institute
• Report/Paper Numbers: OTC #1571 Preprint
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM