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Technical Discussions 407 views 05:58 Dec-30-1998 David Hermanutz Consultant, Hbndt.com, China, Joined Jul 2012 85 tofd applications for hot hydrogen attack on carbon steel I have heard of a TOFD application for measurement of hydrogen damage prior to the micro-cracking stages, I have a 3" carbon steel vessel that needs assessment work done, there are no available samples that have not been exposed for velocity ratio. Vessel is 18 years in service. Post Reply      Translate            04:01 Dec-07-1999 Mohammed Abu Four Re: tofd applications for hot hydrogen attack on carbon steel : I have heard of a TOFD application for measurement of hydrogen damage prior to the micro-cracking stages, I have a 3" carbon steel vessel that needs assessment work done, there are no available samples that have not been exposed for velocity ratio. Vessel is 18 years in service. Post Reply      Translate            04:03 Dec-07-1999 M. Abu Four Re: tofd applications for hot hydrogen attack on carbon steel : : I have heard of a TOFD application for measurement of hydrogen damage prior to the micro-cracking stages, I have a 3" carbon steel vessel that needs assessment work done, there are no available samples that have not been exposed for velocity ratio. Vessel is 18 years in service. Post Reply      Translate