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Technical Discussions 500 views 00:26 Jul-13-1999 Khazali Zin Researcher SIRIM BERHAD, Malaysia, Joined Nov 1998 3 Measurement of Hydrogen attack in steel pipe Can anyone help me to suggest the most accurate ultrasonic procedure to measure the presence of hydrogen attack in steel pipes applicable to petrochemical industry. I assume that attenuation measurement, backwall echo measurement or velocity measurements(thus the poisson ratio) can be used but I am now sure of thier accuracy? Is there any acceptance and rejection criteria for evaluating the severity level of this hydrogen attack? Your urgent reply is highly appreciated. Thank you. Post Reply      Translate            02:56 Jul-13-1999 David Hermanutz Consultant, Hbndt.com, China, Joined Jul 2012 85 Re: Measurement of Hydrogen attack in steel pipe : Can anyone help me to suggest the most accurate ultrasonic procedure to measure : the presence of hydrogen attack in steel pipes applicable to petrochemical industry. I : assume that attenuation measurement, backwall echo measurement or : velocity measurements(thus the poisson ratio) can be used but I am now sure of thier : accuracy? Is there any acceptance and rejection criteria for : evaluating the severity level of this hydrogen attack? : Your urgent reply is highly appreciated. : Thank you. AEA technology have done a lot of good work in this area utilizing TOFD, try Jan.Verkooijen@aea-technology.nl Post Reply      Translate            02:32 Aug-11-1999 Brian Shannon Re: Measurement of Hydrogen attack in steel pipe : : Can anyone help me to suggest the most accurate ultrasonic procedure to measure : : the presence of hydrogen attack in steel pipes applicable to petrochemical industry. I : : assume that attenuation measurement, backwall echo measurement or : : velocity measurements(thus the poisson ratio) can be used but I am now sure of thier : : accuracy? Is there any acceptance and rejection criteria for : : evaluating the severity level of this hydrogen attack? : : Your urgent reply is highly appreciated. : : Thank you. : : AEA technology have done a lot of good work in this area utilizing TOFD, : try Jan.Verkooijen@aea-technology.nl Suggest you contact iesconde.com for further information regarding this mechanism. Post Reply      Translate