Measure the size of any flaw accurately 4. Not interfere with the operation of the gas transmission network 2. For 10 years, a research project has been conducted with the stated aim of providing a pipe line inspection system which will: 1. В«В lessДЄ great deal of time, money and technical expertise has been expended to develop a way to check on the condition of British Gas Corporation's 10,000 miles of pipe lines. Line was cradled into the new ditch, backfilled, hydrostatic-tested, dried then put back into service. Plural component thin film coating was applied by line travel equipment. Line travel shot blast machine used to clean pipe to a near-bright finish. These sections, if any, were cut out and new line pipe was then welded into the section. Old coal tar coating was removed with a water blast process, and old pipe inspected visually for eroded sections. New trench, in the same ditch, was cut with wheel ditches and backhoes to give a 36-in. Backfill was stripped from the line, pipe was pulled from the ditch moreВ В» and skidded, then cut into about 3,000-ft sections. out of service and purged gas from the line. The rehabilitation work was done in the following steps: NGPLC pulled the section of 26-in. Prime contractor was H and K Construction, Inc., and construction was completed in late 1990. system between Robstown and Refugio, Texas. Parts of the 1990 rehabilitation work included a 24.4-mi section of the 26-in. Natural Gas Pipeline Company of America (NGPLC), A MidCon subsidiary, is continuing a several year program to rehabilitate a 26-in, gas transmission line originally installed in 1953 in south Texas.

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