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520 views Technical Discussions Khazali Zin Researcher SIRIM BERHAD, Malaysia, Joined Nov 1998, 3 Khazali Zin Researcher SIRIM BERHAD, Malaysia, Joined Nov 1998 3 00:26 Jul-13-1999 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.                  Reply  Translate  Close   David Hermanutz Consultant, Hbndt.com, China, Joined Jul 2012, 85 David Hermanutz Consultant, Hbndt.com, China, Joined Jul 2012 85 02:56 Jul-13-1999 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                  Reply  Translate  Close   Brian Shannon Brian Shannon 02:32 Aug-11-1999 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.                  Reply  Translate  Close   Product Spotlight ISAFE3 Intrinsically Safe Sensor System StandVallen-Systeme GmbH ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the petrochemica ... l - as well as oil and gas transportation industry. The sensor system is designed for permanent monitoring or periodic inspection tasks. Sensors are available for different AE-frequency ranges optimized for corrosion and fatigue crack detection and other applications. The ISAFE 3 sensor system consists of an AE-sensor (model ISAS3) certified according to ATEX/IEC for installation in zone 0, gas group IIC, IP68, 20 to +60 °C, and a signal isolator (model SISO3) certified for installation in zone 2. An ISAS3 sensor can be mounted in atmosphere or submerged, e.g. in water or crude oil. It is supported by mounting tools for temporary (magnets) or permanent (welded) installation. ISAFE3 supports automatic sensor coupling test and can be used with any AE signal processor supporting 28V supply at 90 mA peak, e.g. Vallen Systeme ASIP-2/A. > 2 Showcases Wireless TOFD scanner StandPromprylad Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is compat ... ible with any type of Windows based Laptop, Desktop or Tablet. > 6 Showcases6 Videos FMC/TFM StandAdvanced OEM Solutions Next generation for Phased Array UT is here now with FMC/TFM! Have higher resolution imaging, impr ... oved signal to noise ratio, characterize, size and analyze defects better with access to several wave mode views and save raw FMC data for higher quality analysis.  Some of the benefits are: Beautiful Image! Easier to understand what you're looking at Completely focused in entire image or volume Much easier to define setups before inspection Easier to decipher geometry echoes from real defects Oriented defects (e.g. cracks) are imaged better See image from different wave modes from one FMC inspection FMC data can be reprocessed/analyzed without going back to the field > 3 Showcases Exertus Dual 120 StandGammatec NDT Supplies SOC Ltd The Exertus Dual 120 Projector has the ability to accept Iridium 192 sources or Selenium 75 source ... s. This projector incorporates design and safety features that make it flexible, compact and lightweight. The Projector is lighter than most of its competitors. It incorporates an improved source channel, based on a new helicoidal design, which makes maintenance easier. The helicoidal design also allows smoother movement of the source assembly inside the device, making it easier for the operator and improving safety. The Projector also has a unique safety feature not found in competitive products. The source assembly locking mechanism is triggered by the source holder capsule at the front of the source assembly, thereby always assuring the operator that the source has returned to the safe position. The Exertus Dual 120 is ISO3999:2004 compliant. > 5 Showcases5 Videos more Showcases Share... Home Exhibition Archive Forum Jobs MyNDT Network Events Directory NDT A-Z Advertise Privacy Policy Contact About © NDT.net - Where expertise comes together. 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