The first LNG ship containment system has fathered what now is known as the "free-standing" or "independent" tank system. This system provides self-supporting tanks which are independent of the ship's hull except at point of support and are not essential to hull strength. A second containment system being successfully marketed today is known as the "membrane" system, where the tank is an intergral part of the ship's structure and derives support from most, or all, of the ship's frame-work enclosing the cargo hold. Since there are quite a few variations of the free-standing tank system compared to membranes, the author briefly discusses these first. The U.S. Coast Guard has divided them into groups in accordance with the U.S. rewrite of IACS document WP/GT-1. Semi-pressure vessels of prismatic or "bodies of revolution" shape, with moderate design pressures, and using model tests, as well as analytical methods, to determine stress levels and fatigue life. Most of the free-standing designs fall under this classification and these are discussed in detail.

Media Info

  • Features: References;
  • Pagination: p. 278-298

Subject/Index Terms

Filing Info

  • Accession Number: 00084887
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 29 1975 12:00AM