STAINLESS STEEL FOR CHEMICAL TANKERS CARRYING PHOSPHORIC ACID

The Author, of Uddeholms AB, discusses the stainless steels used for the tanks of chemical tankers carrying phosphoric acid and other aggressive chemicals, with particular reference to the stainless steels supplied by his firm for this application. Among these is AISI 317L (the Company's UHB 734L), which has largely taken the place of AISI 316L; it often has nitrogen added for increased strength. The paper includes the results of tests in which the effects both of nitrogen and of grain size in stainless steels were investigated. The Company supplies stainless plate up to 14 m long by 3.2 m wide, with a maximum weight of 12 tons; various finishes are available. Plate edge-planed for submerged-arc welding and plate prefabricated in various ways (i.e., pressed or rolled to shape, etc.) can be supplied, and welding can be done by the Company or the customer. Weldability, welding processes, and weld testing are briefly discussed, together with the results of some Varestraint tests on welded nitrogen-alloyed stainless-steel plate (this test method is shown diagrammatically). Some precautions to be taken during welding and tank finishing are listed. Order from: BSRA as No. 47,089.

• Supplemental Notes:
  • Presented at the Uddeholm Technical Seminar, "Nor-Shipping 77", May 12, 1977, Section 3.
• Corporate Authors:

  Uddeholms AB

  S-68305 Hagfors,   Sweden 
• Authors:
  • Paju, M
• Publication Date: 1977

Media Info

• Pagination: 20 p.

Subject/Index Terms

• TRT Terms: Chemical tankers; Stainless steel; Strength of materials; Weld tests; Welding
• Uncontrolled Terms: Weldability
• Old TRIS Terms: Strength analysis
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00168266
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Jan 30 1978 12:00AM