9 PERCENT NICKEL STEEL IN LARGE SPHERICAL TANKS FOR MOSS-ROSENBERG 87,600 CU M LNG-CARRIER A FRACTURE MECHANICAL APPROACH TO TESTING AND DESIGN

This investigation is part of the Moss Rosenberg Verft 87,000 cubic meters LNG-carrier project study. The material to be used in the tank system is 9 percent Nickel steel, at least for the first two ships of the 87,600 cubic meters size. Tensile properties have been established for Charpy-V impact energy, fracture toughness, fatigue strength and fatigue crack propagation rate of plate material and forged sections for the load-carrying equatorial profile, both materials containing welded joints. The steel has been tested in the thicknesses to be used in the actual construction. On the basis of the fracture toughness values measured and the calculated stresses for different parts of the tank construction, critical crack lengths have been determined. Crack propagation rates of different defect sizes in various parts of the tank have also been determined based on calculated stresses. An estimate of the size of non-propagating cracks has been made.

• Corporate Authors:

  Selvigs Forlag A/S

  Radhusgaten 8, Postbox 162
  Oslo 1,   Norway 
• Authors:
  • Tenge, P
  • Solli, O
• Publication Date: 1972-1

Media Info

• Features: References;
• Pagination: p. 9-25
• Serial:
  • European Shipbuilding
  • Volume: 21
  • Issue Number: 1
  • Publisher: Scandinavian Ship Technical Society

Subject/Index Terms

• TRT Terms: Container tanks; Cracking; Design; Liquefied natural gas; Weld tests; Welding
• Uncontrolled Terms: Crack propagation; Weldability
• Old TRIS Terms: Lng tank design
• Subject Areas: Design; Marine Transportation; Materials;

Filing Info

• Accession Number: 00034788
• Record Type: Publication
• Source Agency: European Shipbuilding
• Files: TRIS
• Created Date: Sep 29 1973 12:00AM