ASTM E – “Standard Practice for Contact. Ultrasonic Testing of Welds Using Phased Arrays”. ○. ASME Code Case – “Use of Ultrasonic. ASTM E + REDLINE: STANDARD PRACTICE FOR CONTACT ULTRASONIC TESTING OF WELDS USING PHASED ARRAYS – INCLUDES STANDARD +. ASTM E相控阵操作 – 5/13/ Michael Moles PROPOSED CHANGES TO: APPENDIX IV – PHASED.
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SE provides details to be considered in the procedures used. A number in parentheses indicates the year of last reapproval. Alternative welding techniques, such as solid state bonding for example, friction stir welding and fusion welding for example, electron beam welding can be inspected using this asstm provided adequate coverage and techniques are documented and approved.
The practice is intended to be used on thicknesses of 9 to mm 0. Greater and lesser thicknesses may be tested using this standard practice if the technique can be demonstrated to provide adequate detection on mockups ast the same wall thickness and geometry 1.
The values given in parentheses are for information only. The values given in parentheses e2070 mathematical conversions to SI units that are provided for information only and are not considered standard. NOTE 1—This practice is based on experience with ferrous and aluminum alloys.
Other metallic materials can be examined using this practice provided reference standards can be developed that demonstrate that the particular material and weld can be successfully penetrated by an ultrasonic beam. Summary of Practice 4. A general standard practice document is required to de?
BoxArlingate Ln. AIAWilson Blvd. Current edition approved Aug. Codes and code cases have been developed, or are being developed, to cover phased array weld inspection requirements by organizations such as ASME. Practice E covers setting up of phased arrays for weld inspections. Training programs for phased arrays have been set up worldwide.
This practice provides procedural guidance for both manual and mechanized scanning of welds using phased array systems. While some scan patterns emulate manual technology, other scans for example, S-scans are unique to phased arrays.
With their distinct features and capabilities, phased arrays require special set-ups and standardization, as addressed by this practice.
Commercial software permits the operator to easily make set ups without detailed knowledge of the phasing requirements. In manual scanning, the dominant display will be an S-scan with associated A-scans.
S-scans have the advantage over E-scans that all the speci? Additionally, there should also be training or knowledge and experience related to phased array equipment and techniques. Personnel performing examinations to this standard should list the qualifying credentials in the examination report. Basis of Application 6. The practice or standard used and its applicable revision shall be identi?
The applicable edition of Practice E shall be speci? Practice E recommends methods of assessing performance characteristics of phased array probes and systems.
Since acceptance criteria are not speci? The system shall be capable of generating and displaying both B-scan and S-scan images, which can be stored and recalled for subsequent review. An external storage device,? A remote portable PC connected to the instrument may also be used for this purpose.
If instruments do not inherently store E7200 data, such as some manual instruments, the? E — 09 7. For special applications, frequencies up to 20 MHz can be used, but may require special instrumentation with appropriate digitization, and special approval. Amplitude shall be digitized at a e2070 of at e27700 8-bit that is, levels. Phased array probes may be used with a removable or integral wedge, delay-line, or in an immersion or localized bubbler system mode.
In some cases a phased array probe may be used without a refracting wedge or delay-line that is, just a e2700 wear-face surface. Only 1D arrays or dual arrays con? For 2D arrays, which use electronic oscillation, calibration should be performed at all skewed angles. Range standardization shall include correction for wedge travel time so that the zero-depth position in the test piece is accurately indicated for each focal law. Sensitivity amplitude reference standards that accomplish this are sidedrilled holes parallel to the major surfaces of the plate and perpendicular to the sound path,?
Surface xstm may be used under some circumstances but are not generally recommended.
Where scanning is to be performed along the top or across this weld, the weld reinforcement may be xstm to provide a? It is important to produce a surface that is as? Consideration must be given to these re? The couplant should wet the surfaces of the search unit and the test piece, and eliminate any air space between the two. Typical couplants include water, oil, atm, glycerin, and cellulose gum. The couplant used should not be injurious to the material to be examined, should form a thin?
When glycerin is used, a small amount of wetting agent is often added, to improve the coupling properties. When water is used, it should be clean and de-aerated if possible.
ASTM E2700 – 14
Inhibitors or wetting agents, or both, may be used. In addition, the alternative method and its equipment shall meet all the performance requirements of this standard. For thickness less than 50 mm 2 in.
If this is the case, drill another hole at 1? For certain combinations of thin wall and small diameter pipe side drilled holes may not be practical and surface notches may be used with agreement between contracting parties.
Therefore, it is necessary that the display used provide a uniform color code related to amplitude at all sound path distances.
This method can be used only if the instrument is provided with electronic distance amplitude compensation circuitry TCG. Use is made of all re? The test equipment, probe sfocal law scouplant, etc.
Set the signal from the reference re? This target may be considered the primary reference re? Apply the correction to all focal laws used for the examination.
ASTM E2700-14 Standard Practice for Contact Ultrasonic Testing of Welds Using Phased Arrays
The method for the system used is best described for each instrument in the operating manual for that instrument. Note the amplitude responses from the side drilled holes is the same for each hole even though the angle used to detect the hole and the sound path to the hole is different in each instance. The modeled coverage in the upper portion of Fig. If the equipment has changed by more than the agreed upon tolerances, it shall be re-standardized.
If the source of sensitivity change is a result of change in the number of active elements compared to the baseline assessment it may require probe replacement. Examination procedures recommended for common weld con? Welds shall be inspected from both sides, where possible. The technique used will depend on whether or not the weld reinforcement has been ground? Alternative scanning techniques shall be used for different weld pro? Sample illustrations are shown in Figs. Not all possible con?
Volume coverage afforded by multiple stand-off positions of probes are illustrated for encoded linear scans. This can be replaced with raster scanning where the stand-offs are continuously varied to the limits required using manual movement of the probes.
The distance forward and backward that the probe is moved is determined by the scan plan to ensure full volume coverage. The lateral movement on each raster step shall not exceed half the element dimension in the lateral direction. Scanning speed speed at which the probe is manually moved forward and backward will be limited by the system update capabilities.
Generally using more focal laws requires more processing time so update rates of the B-scan or S-scan displays are slower as more focal laws are used. NOTE—Butt welds should be examined from both sides of the weld and preferably from the bevel opening aastm when access permits. For thin wall sections, a single probe stand-off may be possible for linear scanning if the probe parameters are adequate for full volume coverage.
For thick wall sections, multiple probe stand-offs or multiple focal law stand-offs will be required for linear scanning to ensure full volume coverage.
The e2700 probe placement for the angle beam is on the surface where the e270 bevel opening occurs. For double Vee welds, angle beam examinations should be carried out from both surfaces when access permits. In most cases, the surface from which the straight ast is used needs no further examination using angle beams. For thin sections, it may be possible to use a single stand-off position with either E-scans or S-scans.
Examination from both surfaces of the web-plate plate should be used when access permits. More e27000 one stand-off position may be required for thicker sections. Examination from both sides of the web plate should be used when access permits. This technique is not generally considered to be as effective as the technique described in Fig. Guide mechanisms such as probe holding frames or magnetic strips are used to ensure that the probe moves at a?
Data, in the form of A-scans from each focal law used, shall be collected at increments of not greater than 2 mm with at least three increments for the length of the smallest required detectable defect, that is, a defect length of 3 mm would require increments of not greater than 1 mm along the scan axis.
Note that this interval should be reduced when length sizing of? If laterally focused beams are used, this can be considered for data collection increments as above.
Probe placement will be de? Some phasedarray systems may include options for entering some items into a report format and incorporating S-scan or B-scan images as part of the report. This feature will be used only for assessment 7 of data quality as the scan is progressing and may allow for one or more channels to be monitored.