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  1. TECHKNOWSERV specializes in the nondestructive testing of pipelines with long-range ultrasound (LRUT).  Under ideal conditions,  guided wave ultrasonic testing (GWUT) technology may be used to inspect up to 1000 feet (300 meters) of pipe from a single sensor position or up to 4000 feet (1.2 km) in one day. The actual inspection range depends on the type of pipe coating, degree of corrosion present in the pipeline, number of elbows, and whether or not the pipe is aboveground or underground. Guided wave testing (GWT) technology may be applied to thin- and thick-walled pipe, with diameters rangin...

  2. IntroductionFiberglass tanks are complex structures made from multiple layers of different materials to achieve a balance between strength, weight, and corrosion protection.   Starting from the inside – out, a typical filament wound fiber reinforced plastic (FRP) tank consists of an inner surface, interior layer, structural layer, and outside layer.   The inner surface is commonly 10-20 mils thick resin rich layer.  The interior layer is in the 100 mil range and contains 20 to 30 % chopped glass for strength.  As its name implies, the structural layer carries most of the product related stress...

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