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 -

951 views
Technical Discussions
Abbas Zoher Bombaywala
NDT Inspector
Free Lance, India, Joined Jul 2007, 91

Abbas Zoher Bombaywala

NDT Inspector
Free Lance,
India,
Joined Jul 2007
91
07:18 Feb-18-2009
Re. CC2235

Dear Seniors,

As per Code Case 2235 the thickness of our Calibration block should be +or- 10% of the Actual Job Thickness, but is there any change in this value as the Thickness of the Job increases more then 250 mm. And what is the requirment of Calibration block as per EN473.
Can anyone give me a copy of CC2235 because my PC crashed last week.

Regards.
Abbas Zoher Bombaywala

    
 
 
Udo Schlengermann
Consultant, -
Standards Consulting, Germany, Joined Nov 1998, 174

Udo Schlengermann

Consultant, -
Standards Consulting,
Germany,
Joined Nov 1998
174
15:48 Feb-18-2009
Re: Re. CC2235
In Reply to Abbas Zoher Bombaywala at 07:18 Feb-18-2009 (Opening).

Dear Abbas Zoher,

as you make reference to ASME Boiler Pressure Vessel Code Case 2235:
Use of Ultrasonic Examination in Lieu of Radiography,
I assume that you want to perform ultrasonic weld testing.

But European Standard EN 473 does not recommend any calibration block, it gives the general requirements for NDT personnel:
EN 473:2008
Non-destructive testing – Qualification and certification of NDT personnel.

The complete set of 3 International Standards for UT of welds is under revision now:
prEN ISO 17640:2008
Non-destructive testing of welds – Ultrasonic testing of welded joints;
prEN ISO 23279:2008
Non-destructive testing of welds – Ultrasonic testing – Characterization of indications in welds;
prEN ISO 11666:2008
Non-destructive testing of welds – Ultrasonic testing of welded joints – Acceptance levels.

These standards also make reference to the necessary calibration blocks.

Best regards
Udo Schlengermann
Chairman ISO/TC135/SC3 (UT)
Convenor CEN/TC121/SC5/WG2 (UT of welds)

    
 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1094

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1094
16:31 Feb-18-2009
Re: Re. CC2235
In Reply to Abbas Zoher Bombaywala at 07:18 Feb-18-2009 (Opening).

Abbas, is this for piping or vessel weld inspections. For piping, ASME V Article 4, piping Calibration Blocks, T-434 and Fig. T-434 requires that "The basic calibration block shall be a
section of pipe of the same nominal size and schedule."

For materials < 20" diameter T-434.1.7.2. and Fig. T-434.1.7.2. allows, "a single curved basic calibration block may be used for examinations in the range of curvature from 0.9 to 1.5 times the basic calibration block diameter."

For materials > 20" diameter T-434.2 and .3 and Fig T-434.2 thickness ranges are up to 1", > 1" up to 2", > 2" up to 4" and above 4" with block thickness either as per the Table or the actual thickness t, defined by note (h).

I am not aware of a 10% allowance on calibration block thickness - please can you tell me where did you read this?

    
 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1094

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1094
16:59 Feb-18-2009
Re: Re. CC2235
In Reply to Nigel Armstrong at 16:31 Feb-18-2009 .

Further to Abbas' enquiry I would be interested to read whether inspections to either CC 181 or 2235 require separate qualification and calibration blocks. My response was based on the calibration block requirement with the appropriate notches and drilled holes and NOT the qualification block.

I believe the dimensions of the qualification block will be dictated by the need to demonstrate that the maximum allowable flaw size at the far wall (representing a root defect) will exceed the reference level. In order to best represent the coupling and sound propagation conditions of the work-piece the qualification block should be a section of the work piece material, i.e. the same thickness. If a qualification block is destined to cover a range of workpiece thicknesses, then these conditions may vary across the range covered and replication of the test conditions could be lost.

    
 
 

Product Spotlight

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

Swift & Scorpion2 - a state-of-the-art remote-control ultrasonic crawler

The Swift and Scorpion2 dry-coupled, remote-access ultrasonic crawler bring major efficiency and d
...
ata improvements to tank shell inspections and other structures such as vessels and offshore installations.
>

High Resolution Industrial CT System for Small/Medium Size Parts Inspection

The YXLON FF35 CT computed tomography system is designed to achieve extremely precise inspection res
...
ults for a wide range of applications. Available in a single or dual tube configuration, it is perfect for very small to medium size parts inspection in the automotive, electronics, aviation, and material science industries.
>

Compact NDT inspection-heads for measurements with active thermography

The compact inspection head is suitable for thermographic ndt tasks. The uncooled infrared camera
...
is specially developed for NDI-tasks and offers a thermal sensitivity until now known only from thermal imagers with cooled detector. All required components and functions are integrated into the inspection-head. You will only need an ethernet cable to connect the sensor with the evaluation system.
>

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