where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

Technical Discussions
Navish M
Navish M
07:35 Jan-12-2009
Phased Array

Hello All,

Does it really require having Individual piping Blocks of thicknesses & diameters for demonstration/ ref calibration as per ASME CC 181 or we can use the range for specific diameters & thickness.


Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1307

Ed Ginzel

R & D, -
Materials Research Institute,
Joined Nov 1998
13:20 Jan-12-2009
Re: Phased Array
In Reply to Navish M at 07:35 Jan-12-2009 (Opening).

You are mixing two aspects of ASME CC181; i.e. calibration and demonstration. CC181 states that you are to follow the rules in Article 4 of Section V. Since CC181 is only addressing the permission to use an alternative acceptance criteria on pipe welds you are therefore required to use the piping calibration requirements. T-434.3 states that the calibration block shall be from a section of pipe of the same nominal size and schedule. So as for the "calibration" portion of your question the answer is no, you are not permitted to use a range.
The issue of demonstration is separate. This is not specified in the ASME CC181. However, EPRI has been for years "qualifying" techniques with a tolerance of about 6mm above and below that demonstrated on. For now, (until ASME defines this parameter) I would think that that should be a reasonable limit. A reasonable range of diameters addressed by the demonstration should also apply. Fig. T-434.1.7.2 provides a graph of curvatures limits used for curved "plate". Six diameters are identified on that image over the range of 1 to 20 inch diameter. I would suggest that this is a reasonable guide for the demonstration block diameter ranges.


Product Spotlight


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

ISAFE3 Intrinsically Safe Sensor System

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.

OmniScan™ X3 flaw detector

The OmniScan X3 flaw detector is a complete phased array toolbox. Powerful tools, like total focus
ing method (TFM) images and advanced visualization capabilities, enable you to complete your inspection with greater confidence.

High-performance Linear Phased Array Probes

Available to order from stock in a range of 5MHz – 7.5MHz and from 16 to 64 elements. Designed w
ith piezo-composite elements, Phoenix phased array probes provide high-resolution imaging to maximise sensitivity; accurate ultrasonic detection and sizing of defects in welds; and effective corrosion mapping. Housed in a rugged stainless steel case for on-site industrial NDT applications.

We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
this is debug window