A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Examination of Failed Ten Inch Cast Iron Pipe Gas Main, Pennsylvania Gas and Water Company, Scranton, Pennsylvania
The Office of Pipeline Safety submitted a length of the pipe containing the crack which caused a gas explosion which essentially destroyed a building in Scranton, PA, to NBS for examination in order the determine the cause of failure. Cross sections taken through the pipe revealed extensive graphitization (corrosion). The graphitization started at the outside wall surface of the pipe and progressed inward. In addition, relatively large amounts of free ferrite were observed surrounding the graphite flakes, accounting for the apparent 'ductility' in this material. It was concluded that the load carrying capacity of the pipe had been reduced significantly because of the graphitization and the porosity, and that this reduced load carrying capacity coupled with an apparent bending stress applied externally caused the pipe to crack.
Examination of Failed Ten Inch Cast Iron Pipe Gas Main, Pennsylvania Gas and Water Company, Scranton, Pennsylvania
The Office of Pipeline Safety submitted a length of the pipe containing the crack which caused a gas explosion which essentially destroyed a building in Scranton, PA, to NBS for examination in order the determine the cause of failure. Cross sections taken through the pipe revealed extensive graphitization (corrosion). The graphitization started at the outside wall surface of the pipe and progressed inward. In addition, relatively large amounts of free ferrite were observed surrounding the graphite flakes, accounting for the apparent 'ductility' in this material. It was concluded that the load carrying capacity of the pipe had been reduced significantly because of the graphitization and the porosity, and that this reduced load carrying capacity coupled with an apparent bending stress applied externally caused the pipe to crack.
Examination of Failed Ten Inch Cast Iron Pipe Gas Main, Pennsylvania Gas and Water Company, Scranton, Pennsylvania
M. L. Picklesimer (author) / T. R. Shives (author)
1972
27 pages
Report
No indication
English
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