: Could anybody provide me the best source for purchasing a TOFD : ultrasonic system for evaluating HIC/SOHIC occurence on pressure vessel and pipelines up to 3" OD minimum in the LNG plant situated in an offshore environment. I've heard of Ultratek system from US, but I could not justify them fully to our Cost Control Department because there are other similar system available in UK which seems to be more commercially acceptable. : I believe that only those with vast experience on the use of this equipment could give a better appraisal as they would know the hidden weakness of various system available in the market. .
In line with some of the previous messages posted TOFD would not be a first line tool in the location and quantification of HIC, considerable work can be performed using manual pulse echo but for monitoring purposes Automated Pulse Echo is really the only tried and tested method. TOFD may have some use in the examination of SOHIC at the HAZ put the seperations likely to be associated with the degradation mechanism could well cause confusion during interpratation. Whatever you decide I would suggest you do not use it as a stand alone technique at any time for this application.
Zhong Yi brand pipeline crawler is magnetic/micro-video controlled
crawler with DC X ray unit inst
alled for checking welding of pipeline.
Move steadily inside the pipeline 6''-60''diameter with speed of up to
18m/min, Max. moving diatance 5 kilometers and provide the efficient
inspection of the pipeline.