Utilities focus on cast iron management programmes. J. Brown, P. Collette and R. Goffred. Pipeline Gas J., March 1995, 222(3), 40--51 (7 pages).

Cast iron mains are being replaced by steel and plastic pipelines but about 50,000 miles are still operating in the US. Three approaches for managing a cast iron gas distribution system are reviewed. Management plans cater for potential earthquake damage on the West Coast, problems of frost and thaw cycles in cold weather states, and tractor damage to pipelines in other areas. Specific problems faced by major gas distribution companies in New York, San Francisco, and New Jersey are reviewed. Each has different programmes but common elements are the use of computerized records, hazard identification, addressing cast iron breaks and cracks, developing replacement plans, and working with state and local government agencies.

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