TV AID IN PIPELINE CORROSION DETECTION

A specially designed and constructed television camera for the gas distribution industry has recently been developed in the U.S. The device is a versatile weapon solving many problems such as internal inspection of pipes for corrosion holes, determining whether water is in the main, locating obstructions and corrosion spots in pipes, examining joints, determining whether valves are open or closed, and inspecting sealing operations on cast‐iron mains, etc. For such work the main must be kept open. The new technique is particularly useful for small mains—12 to 24 in. in size.