ASTM E2491 PDF

This standard is issued under the fixed designation E; the number 1 This guide is under the jurisdiction of ASTM Committee E07 on Nondestruc-. Originally contact ASTM Customer Service at [email protected] For Annual Book of ASTM approved in Last previous edition approved in as E Buy ASTM E Standard Guide for Evaluating Performance Characteristics of Phased-Array Ultrasonic Examination Instruments and Systems from SAI.

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But I had a hard time to calibrate from 35 to 75 degrees with the radius of the IIW block. Hamid, your question is added to a thread on ACG. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Re: Question about ASTM E

Note that there are technical limits to ACG, that is, beyond a certain angular range, compensation is not possible. Let me know what you think! E gives guidance on evaluating performance of phased-array systems. E249 this too focusing will have a significant effect on the ability to calibrate for a consistent sensitivity over a range of angles the more you focus theless you are likely to maintain sensitivity with steering. I personally would have said something like: Ginzel, hello Marc, Marc and myself have been discussing about the ACG recently, so he e4291 this topic to me.

ASTM E2491 TYPE B PHASED ARRAY ASSESSMENT BLOCK, 1018 STEEL

The compensation is typically performed electronically at multiple depths. In fact I do not think that this function even compensates for a fixed depth SDH.

Very interesting topic, I look forward to read your point of view, or from others too. This means that if you try to calibrate from a single position, the beam will hit the radius penpendicularly at only one angle and the effect is going to be worst at higher and lower angles.

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I have noticed the same thing that Marc did when I calibrated using a side-drilled hole at constant depth, so I turned to the radius. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory e241 prior to use.

Exit point migrations do occur but again, vary, depending on the probe and wedge. This guide is not intended to be used as a substitute for calibration or standardization of an instrument or system to inspect any given material. All or portions of the guide may be used as determined by the aastm.

There is also a concern for focusing. In fact you are still generating some compression mode at this angle. Historical Version s – view previous versions of standard. I would please like to know if there is any restrictions on sstm surface roughness of a reference block for phased-array application.

Where acceptance criteria are implied herein they are for example only and are subject to more or less restrictive limits imposed by customers and end users controlling documents. I believe that you both are on the right track, but I would have something to add.

Any clarification will be appreciated! Instrument characteristics measured in accordance with this guide are expressed in terms that relate to their potential usefulness for ultrasonic examinations.

I provided this definition from a list of Phased Array definitions that had been assembled with input from a variety of manufacturers and users. Instead, this would be better addressed using a radius to ensure a constant area reflecting surface. I went through ASTM E and the discussions in asrm forum but I found nothing on the surface roughness of phased-array blocks. But there are far too many variables for the manufacturer of probes and instruments to try to look after these limitations and in the end the verification of suitability is asm by looking at the results on targets like those suggested in E Instrument characteristics measured in accordance with this guide are expressed in terms that relate to their potential usefulness for ultrasonic examinations.

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The compensation is typically performed electronically at multiple angles. Link to Active This link will always route to the current Active version of the standard. Other electronic instrument characteristics in phased-array units are similar to non-phased-array units and may be measured as described in Guide E4291 or E I thought TCG was applied at multiple depth to compensate for the attenuation due to the material and ACG at multiple angles to compensate for beam steering.

Finally, not to show things worst than they are. Similarly, at the upper end of your range the divergence is causing a large portion of signal to mode convert to Rayleigh!

Using a Side Drilled Hole may not even be the best option.

Or maybe the definition implicitly includes the TCG because the two can’t live together when doing S-scan calibration. You will end up with a distorted S-scan. I measured amplitudes from 1. Just because the software can be used to enter a range of angles is perhaps misleading.

Other electronic instrument characteristics in phased-array units are e241 to non-phased-array units and may be measured as described in E or E Is it a possibility to still use the radius and move the probe for each angle? Typical of a practical application, E states in A2. This standard does not purport to address all of the safety concerns, if any, associated with its use.

Regards Ed Start Original Satm Let me know if you have a suggestion for better wording and I can prepare the necesary changes to the document. No other units of measurement are included in this standard.