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- since 1996 -

Zawada NDT
Suppliers of instruments to test steel wire ropes in-situ, using magnetic, non-destructive method.
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Technical Discussions
Charlie Jackson
Engineering
MBINSPECTION, United Kingdom, Joined Aug 2003, 7

Charlie Jackson

Engineering
MBINSPECTION,
United Kingdom,
Joined Aug 2003
7
01:04 Apr-08-2003
Re: TOFD Ultrasonic System

: 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.




 
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