Standard Memberlucas
Standard MemberForum Replies Created
Some standards of different organizations are just copy & paste, others differ in some essential points, you can find here in the forum often valuable discussions about those differences: So check for information about such topics
Some standards of different organizations are just copy & paste, others differ in some essential points, you can find here in the forum often valuable discussions about those differences: So check NDT inspect for information about such topics
• https://www.iso.org/ics/77.040.20/x/ NDT of Metal 9. ASTM Standards list: https://www.astm.org/Standards/nondestructive-testing-standards.html Of course there are lot other institutions having the same or similar list on their pages, in their text books, in their training documents – sometimes refined for special industrial sectors like Aerospace, Pipe Welding, Maritime, Windmill etc. Basically I would prefer the pages of the standardizing bodies like ASTM, DIN, EN, BSI or the NDT societies like ASNT, EFNDT … as there you have the best chance to get the most actual lists. In the first step I thought, maybe NDT.net should also provide such a list to make it more comfortable to have the complete overview as the different Standardization organizations could maybe only focus on their own standards – but if you browse through my link list, you can easily see: most list give you an overview about all standards which are important.
Standards for Rail Weld inspection vary widely, and it also depends what welding method is used – Flash-butt welding is normally checked using magnetic particle inspection (EN14587/ ISO17638) , and aluminothermic ‘welding’ is normally checked ultrasonically.
Broadly, I would suggest using the standards that correspond to other rail inspection work on the Network – Its a very long time since I had any involvement with Peru, and as I recall their main rail networks are fairly unusual, so the subway may be different.
Standards / procedures you may want to look at include:
Australia – ARTC Manual for NDT of Rail ETN-01-04
General EN14730 – Aluminothermic welding of new rails
UK RT/CE/S/055 Rail Testing, Ultrasonic procedures, (Procedure U6 is relevant)
You might also be interested in the approach we developed for London Underground – Contact me if you need more info.
When – Final visual inspections must be performed: a) When the weld is complete, and in the final sur- face and heat treated conditions b) Before other NDT (when required) c) Before being made inaccessible for inspection
ASME is boiler and pressure vessel code.
So look for a ISO or ASTM standard such as ISO 9327, ASTM 388We find that the DMS Go+ and DA 503 probe will cover most of the rubber conveyor belts types. It is a most cost effective solution.
The typical requirement of asset owners is to measure the cover thickness of rubber down to either the fabric or steel cord.
Using a twin crystal probe allows you to take thickness measurements down to less than 1.0 mm.
You require a machine with a good quality pulser so that the pulse of sound energy can penetrate the rubber. This is due to the sound absorbing properties of rubber. Standard ultrasonic thickness gauges just do not measure up. Using a single crystal probe will allow you to measure say 4 mm rubber and above but due to the design of a single crystal you cannot measure thin thickness.
That is why the above combination is the most suitable.
Hope this helps
CheersIt was a very good demonstration for one side TOFD. With the benefit of lateral and backwall dead zones elimination, it is useful for single side access welds when traditional TOFD is not practical to perform.
Diffraction amplitude of upper and lower tip with respect to angle is available for traditional TOFD. Is similar one available for same side TOFD?
Te lops manufactures various models of cooled infrared cameras with high definition sensor (from the hd series: http://telops.com/products/high-speed-cameras), including the FAST M100hd and the new FAST MShd (2048×2048 pixels). Multiple optics are available as well with calibration from -20 up to 1500 deg C! Rental units are available on demand.
Location- Middle East
Contract – Long Term
Experience Required in PAUT – 05 Years +
Rope Access Experience – Desirable
Valid & Mandatory Certifications as below :-
Irata – Level 1
PCN PAUT – Level 2
Salary – Best in the Market
Availability – Should be from India
Status – Top UrgentIf you the right profile, please send you Updated
CV (only ) for shortlist :-Are u in search of a RVI equipment? Because we have given several RVI equipments to power generation industries and also to Oil Refineries. Please do contact me if you have further queries.
You must have a physical barrier at 7.5 ìSv/hr. How do you achieve this? Let’s say you use 250 kV and 4 mA in your example. If no object is in the way for the radiation this gives 6 Sv/hr at 1 metre. If you then use the inverse square law the safety distance is 895 m. For steel and 250 kV the half value layer is 12 mm. So if the incoming radiation is 6 Sv/hr the radiation out is approx. 3 Sv/hr, then you need a safety distance of… 632 m. –Wow. This is how to calculate the safety distance for the central beam of radiation, but in the real life you have other objects around you that absorb the radiation (pipes, valves, etc.), so if don’t want to set up a barrier around half the world you need to measure the radiation level with a dose rate meter.
Thank you for your interest and insightful comments. Here are some explanations:
1. Page 8: When we compare A-scan amplitudes of experimental and numerical results we followed two steps:
a) For experimental results, as you mentioned, we have converted the ultrasonic response energy to percentage.
b) For numerical results, the A-scan responses are not normalized, however, calibrated. The numerical software used in this study is CIVA (CEA, Fr) is based on semi-analytical finite element model calculations. As a result, we obtain “CIVA points” for each calculation and these points are converted into percentages.
The calibration value for all work is selected as the maximum amplitude observed from the defect center of 5 mm debonding. In order to match the response for each case, results are not normalized however numerical model parameters have been adjusted.2. Variation model with metamodels: As you described, metamodels are models of models, or response surfaces, that are mathematical approximations that are used to reduce the computation time of specific points. In this work, we have calculated 1054 real models to build, or ‘train’, our metamodel based on the number and the range of selected uncertain parameters. While in theory, it is possible to build a metamodel with a lower amount of calculations, in our case, it would have increased the error caused by mathematical approximation.
Each MAPOD curve we have obtained is based on the calculated metamodel, as a result, the confidence bound and calculated PoD values are quite similar.I hope this explains your questions, however, in case it is not clear, please feel free to continue the discussion.
For instance UT transducers, the buyers guide offers a very specific break down of 20 types of transducer products, such as delay line transducers, Immersion transducers etc.. Is it necessary? is it reliable? does it really mean what company delivers or is it just not up-to-date? Similar question for equipments, Flaw Detectors and High Frequency Instrumentation. Would it better to say just Flaw Detector and check people can check with the companies if they offer high frequency instruments?
What is your opinion?
What are essential names of products or services the NDT categories should show?The scabs are on most areas but missing from the top part and dish ends of the vessel.
Could any one of you give me an idea as to what the cause might be.Is there a particular reason why would you *not* want to add a group for a linear E-scan? Detection of lack of fusion is extremely sensitive to incident angle. Just because your sectorial scan passes through the weld volume doesn’t necessarily mean you’ll be able to pick it up.
If giving a “no match” result on your PMI analyzer doesn’t mean it’s having an error but the material you are inspecting wasn’t in it’s library. By removing batteries while the machine is on could possibly damage the program. Make sure your batteries fully charge and try to turn it on again, if still doesn’t work contact the vendor and ask them how to rectify the problem
In truth the Level 3 or Engineer that established your exposure parameters (inspection procedure) should have accounted for this but if he didn’t and you are truly concerned you could try the following (but check with your lead or client before hand to ensure they are ok with it):
For Double wall exposure set your source or camera up as you normally would but then offset your source or camera slightly (no more than 15 degrees) to the right leaving the film or detector plate in its normal position and take the exposure. Then move the source or camera to shoot the same exposure but offset it to the same number of degrees to the left and take a second exposure.
If your 1/2″ cable is laid in the center, or fallen there due to gravity, then doing the offset exposures will allow you to shoot under the cable.
If you have a perfectly perpendicular transverse crack which is tight you may not see it this doing this but you can improve even detecting this by paying very close attention to the grey scale density of your image Unless the transverse crack is exactly in the middle of the material under the cable you should see a density change though it may be slight.
I am not a Level 3 nor do I profess to be an absolute authority or expert in Radiography but as a Level 2 with some experience that is something I might try. Others may have alternate ideas.
Hope this helps. Cheers…
Radiography is used to image blocked valves all the time.
Film could be a bit slow so DR or CR would be better but whether it takes 10 minutes for a film exposure or 1 min for a DR or CR exposure you’ll still get a result.2mm MAY not be examined by PAUT successfully. I have no PAUT expericence with 2mm. But creep wave worth trying.
Above 3mm, you can try probe with A15 housing, with 16 elements generally. Maybe 5L16 or 7.5L16, but you need to try.
Key for such thin weld is the size of wedge. Smaller is better.
Shear wave is enough for such thin stainless steel.
No, you can differentiate the signals. There is no chances of disappearing the signal but lesser the amplitude you cause with. you should compensate the loss of energy by adding some gain. The amount of gain you add depends on the fuel flow inside the pipe which is complex to calculate. Better add some dB based on the usual repeated signal from the active pipe.
I recently had an opportunity to work in nuclear sector up in canada, did not worked yet but they offered 37,50 hourly plus extras .. about us 600 per 12 hour shift.
How much is the Fees for NDT ASNT level 3 exam For Usa
Hello Sir,
Their is no time frame for lifting the calibration blocks. The important thing is your yoke should be able to lift 4.5 kgs in AC.MFL – Full Length, 3 location UTTG, Pin and Box connection Black Light required.
Some clients go for FLUT as well.
