AUTOMATIC WELDING FOR AN LNG STORAGE TANK OF 9 PERCENT NICKEL STEEL

The application of the automatic TIG, automatic pulsed-MIG and submerged-arc welding processes to the vertical and girth butt joints of an above ground liquified natural gas (LNG) storage tank of 9 percent nickel steel was examined using the newly developed welding equipment, Hastelloy-type filler wires and low SiO subscript 2, high basic bond-type fluxes. The test results are summarized as follows: 1) The amount of deposited metal obtained per day by the automatic TIG and automatic pulsed- MIG welding processes (both applied to the vertical butt joint) was, respectively, more than 1.6 and 2.5 times that by the shielded metal-arc welding process (approx. 3.7 kg/d). 2) The automatic TIG welding process, though its deposition rate was not so large as that of the automatic pulsed-MIG welding process, was able to obtain more consistent welds of very high quality. Moreover, as the time for grinding head surfaces can be remarkably reduced and the weld reinforcement shape controlled easier, the welding efficiency of the process is not inferior to that of the automatic pulsed-MIG welding process. 3) The amount of deposited metal obtained per day by the horizontal submerger-arc welding process and the conventional submerged-arc welding process was, respectively, more than about 9 and 12 times that by the shielded metal-arc welding process.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00189820
• Corporate Authors:

  Ishikawajima-Harima Heavy Industries Co., Ltd.

  2-16, Toyosu 3 Chome, Koto-Ku
  Tokyo 135,   Japan 
• Authors:
  • Kunyama, Y
  • Toyomasu, K
  • Yokodura, M
  • Kurehashi, T
  • Kohno, T
  • Katayama, N
  • Kuriiyama, T
• Publication Date: 1976-7

Media Info

• Features: References;
• Pagination: p. 1-12
• Serial:
  • IHI Engineering Review
  • Volume: 9
  • Issue Number: 3
  • ISSN: 0018-9820

Subject/Index Terms

• TRT Terms: Automatic welding; Container tanks; Electric arc welding; Fluxes; Inert gas shielded arc welding; Liquefied gases; Liquefied natural gas; Shipbuilding; Welding
• Old TRIS Terms: Inert gas welding; Tank construction
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00149629
• Record Type: Publication
• Source Agency: Ishikawajima-Harima Heavy Industries Co., Ltd.
• Files: TRIS
• Created Date: Apr 13 1977 12:00AM