Hello NDT experts, I would like to do some immersion experiment in the turbulent water of a tank. To find out, is there any change in the signal due to violent distrubance of the water. We have a 5MHz SonatestCD5-20 probe. Can I use it for this experiment or do I need a different probe. Any other informatin about this technique will be really very helpful. Appreciate in advance.
Re: Immersion Technique Dear Shyamal, In our immersion inspection system you can cahnge some of the parameters of the water system and generate different level of turbulent flow. Please visit our web-site for the LS-200 and LS-25 immersion systems intend mainly for disc inspection of jet engines and others. For these applications we use our new immersion probe- ISP2-10 HR-3. For more information please contact us.
: Hello NDT experts, : I would like to do some immersion experiment in the turbulent : water of a tank. To find out, is there any change in : the signal due to violent distrubance of the water. : We have a 5MHz SonatestCD5-20 probe. Can I use it for this : experiment or do I need a different probe. : Any other informatin about this technique will be really : very helpful. Appreciate in advance. . : Shyamal : .
Re: UT on PVC welds and bonded joints : : We are looking for information on ultrasonic techniques : : and equipment to inspect PVC pipe and plate joints. : : Is there literature on this subject that is easily : : available? : : Three joining methods are used, butt-fusion, : : epoxy bonding and PVC filler welding. : : Testing is now just an air pressure test. Future : : requirements will require better test methods.
: : Also, are there applicable acceptance codes for : : UT inspection of these joints?
: : Thank you in advance.
: : S.B. Lee
: The following article is available on NDTnet: : http://www.ndt.net/article/twi/twi.htm
: ULTRASONIC AND RADIOGRAPHIC NDT OF BUTT FUSION WELDS IN : POLYETHYLENE PIPE : Paper presented at Plastic Pipes IX Heriot-Watt University, : Edinburgh, Scotland, UK, : 18-21 September 1995 : by I.J. Munns and G.A. Georgiou TWI, Abington UK
: This paper summarises work at TWI on NDT of butt fusion welds in polyethylene : and compares this work with results from other published : literature on this topic. The major objectives of this study were to develop : ultrasonic and radiographic testing procedures for the inspection of : butt fusion welds in polyethylene pipe systems. The procedures were developed : on pipes with diameters greater than 180mm and thicknesses : greater than 12mm. The underlying techniques, however, can be used on testpieces : other than pipes, and on a range of different polyethylene types and thicknesses.
: 4. Conclusions
: The main conclusions are based on the work undertaken at TWI on a range of : polyethylene materials and pipes with diameters greater than : 180mm and thicknesses greater than 12mm.
: - Ultrasonic creeping waves can be used to inspect the fusion area immediately : beneath the outer weld bead in polyethylene pipes. : - Ultrasonic tandem and TOFD techniques can be used to detect and image : perpendicular planar flaws in butt fusion joints in polyethylenepipes. : - Ultrasonic techniques are currently unable to detect nominally cold welds. : - Radiographic intensities of between 16kV and 26kV are optimum when inspecting : thicknesses of polyethylene pipe between 5mm and 50mm. : - With radiography it is possible to infer the presence of a cold weld from : local radiographic density measurements. : - Polyethylene wire type IQIs have been proven to achieve radiographic : sensitivities at least as good as polyethylene plaques and step : wedges with holes, and have other practical handling advantages with regard : to pipe inspection.
Re: UT on PVC welds and bonded joints David Fryer, The following may be of interest to you, but is only applicable to Polyethylene pipe. 1. A search of the GRI database at www.gri.org using butt fusion gives several references, for reports related to butt fusion .
2. Krautkramer "Ultrasonic Testing of Materials" 4th edition, page 557 gives reference to a test specification IIW-V-627-78, although I do not know the current status of this document.
Regards, Jeff Phillips Email:email@example.com WWW: http://www.deakin.edu.au/~jeffreyp
Re: UT on PVC welds and bonded joints : : We are looking for information on ultrasonic techniques for punching holes. : : Is there literature on this subject that is easily : : available?
We need to make a rectangular hole through a multihollow PVC extrusion, 8 walls. This is a blind hole the last two walls will not be cut. Normal punching methods will not work. Is ultrasonics used to vibrate a blade to cut deep holes.
Re: Use of ADC card for ultrasonic measurements : Hello Thanks in advance. I want to make use of ADC card for the ultrasonic attenuation and ultrasonic velocity measurements. Kindly help me out with necessary PCI card and the software. Thanking you.
Re: How to prepare nanoparticle gels of ZnS/CdS/SeS : Hello : I would like know how to prepare the nanoparticle gels of ZnS/CdS/SeS? Kindly help me out. : Thanking you. .Is their any way preparing this through microemulsion route