SYMPOSIA PAPER Published: 01 January 1975
STP29154S

Significance of Defects in Liquefied Natural Gas Tanks in Ships

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The commonly encountered defects in welding of 9 percent nickel steel and aluminum alloy 5083-0 for liquefied natural gas tanks are described, and their significance with respect to fatigue crack propagation and fracture in ship tanks is discussed. Fracture mechanics testing and analysis have been applied. Diagrams describing the growth in depth and length of surface cracks in welded joints as a function of long term distribution of dynamic stresses for North Atlantic service are presented. The possibilities and limitations of the presently used nondestructive testing methods are treated.

Author Information

Tenge, P
Det norske Veritas' Division for Materials Engineering and Inspection, Oslo, Norway
Solli, O
Det norske Veritas' Division for Materials Engineering and Inspection, Oslo, Norway
Förli, O
Det norske Veritas' Division for Materials Engineering and Inspection, Oslo, Norway
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Details
Developed by Committee: E50
Pages: 10–43
DOI: 10.1520/STP29154S
ISBN-EB: 978-0-8031-4659-4
ISBN-13: 978-0-8031-0538-6