An inspection apparatus includes an inspection unit that is lowered into vertically supported pipe filled with seawater. The apparatus includes a pipe weld location detector module carried by the inspection unit. The apparatus also includes a rotating time of flight diffusion (TOFD) module and a non-rotating...http://www.google.ca/patents/US7104125?utm_source=gb-gplus-sharePatent US7104125 - Internal riser inspection device and methods of using same
