SEDL / STP / STP945-EB / STP23245S

Propagating Shear Fracture in Natural Gas Transmission Pipelines

Sugie, E
Senior researcher, Mizushima Technical Research Laboratories, Kawasaki Steel Corporation, Mizushima,

Matsuoka, M
Senior mechanical engineer, Kakogawa Works, Kobe Steel Ltd., Kakogawa,

Akiyama, T
Manager, Keihin Works, Nippon Kokan K. K., Kawasaki,

Tanaka, K
Senior research engineer, R and D Laboratories 2, Nippon Steel Corporation, Sagamihara,

Tsukamoto, M
Research engineer, Technical Research Laboratories, Sumitomo Metal Industries Ltd., Ibaraki,

Pages: 10    Published: Jan 1988

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Abstract

The propagating shear fracture in natural gas transmission pipelines can be theoretically analyzed, and the crack velocity and propagation distance can now be calculated. The propagation theory has a good consistency with the experimental results for 1219 mm (48 in.) outside diameter (OD) × 18.3 mm (0.72 in.) wall thickness (WT) line pipes, and it predicts the notch ductilities of line pipes required for arresting the fracture according to the type of the gas, the acceptable fracture length, the pipe size, and the design stress of the pipeline.