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 -

2351 views
Technical Discussions
Zaheer
NDT Inspector, and as trainer
NDT Centre Pakistan, Pakistan, Joined Aug 2003, 2

Zaheer

NDT Inspector, and as trainer
NDT Centre Pakistan,
Pakistan,
Joined Aug 2003
2
00:06 Aug-14-2003
ASME Standard for spot Radiography


Dear Sir,
Last week we were discussing in a training course, the acceptance criteria of radiographic testing given in ASME 2001, section VIII Division 1 UW-52 for spot radiography.
Our interpretation of Para UW-52 (c) (2) and (3) page-153 is as under:
- Any indication (other than mentioned in (1)) are always acceptable in any job thickness.
- Any one and only one indication in 6t of weld length having size upto 2/3t is acceptable, for example, if t=60 mm the allowable size (diameter or other maximum dimension) of defect is 40mm.
- Now the third case is that if more than one indications within acceptable limits exist in line (we are also confused about the word "in line" as we under stand it mean that any indication touching a common straight line and the indication itself may have a maximum dimension at and oblique angle to the weld axis or may be at right angle to the weld axis), in 6t of weld length, then sum of all these indication shall not be more than t.
- But if more than one indications appear in line and the space between these indications is not greater than 3L, where L is the length of the longest indication, then length of all the indications will be summed and the sum should not be greater than 19 mm. We are also confused with "L". Kindly clarify it. Is it like the L given in FIG. 4-2 on page 355 of ASME 2001, Section VIII division 1?
- Also if any one indication having space more than 3L, but having greatest dimension more than 19 mm shall be unacceptable.
- Some of us think that if there is a indication of diameter 40 mm in a 60 mm thick job is acceptable as per Para (c) (3) of UW-52.
It will be very kind of you if all the above mentioned confusions could be cleared by examples and figures.
With regards.
Zaheer Ahmad.




    
 
 Reply 
 
prashant lode
prashant lode
02:26 Jan-21-2004
Re: ASME Standard for spot Radiography
----------- Start Original Message -----------
:
: Dear Sir,
: Last week we were discussing in a training course, the acceptance criteria of radiographic testing given in ASME 2001, section VIII Division 1 UW-52 for spot radiography.
: Our interpretation of Para UW-52 (c) (2) and (3) page-153 is as under:
: - Any indication (other than mentioned in (1)) are always acceptable in any job thickness.
: - Any one and only one indication in 6t of weld length having size upto 2/3t is acceptable, for example, if t=60 mm the allowable size (diameter or other maximum dimension) of defect is 40mm.
: - Now the third case is that if more than one indications within acceptable limits exist in line (we are also confused about the word "in line" as we under stand it mean that any indication touching a common straight line and the indication itself may have a maximum dimension at and oblique angle to the weld axis or may be at right angle to the weld axis), in 6t of weld length, then sum of all these indication shall not be more than t.
: - But if more than one indications appear in line and the space between these indications is not greater than 3L, where L is the length of the longest indication, then length of all the indications will be summed and the sum should not be greater than 19 mm. We are also confused with "L". Kindly clarify it. Is it like the L given in FIG. 4-2 on page 355 of ASME 2001, Section VIII division 1?
: - Also if any one indication having space more than 3L, but having greatest dimension more than 19 mm shall be unacceptable.
: - Some of us think that if there is a indication of diameter 40 mm in a 60 mm thick job is acceptable as per Para (c) (3) of UW-52.
: It will be very kind of you if all the above mentioned confusions could be cleared by examples and figures.
: With regards.
: Zaheer Ahmad.
:
------------ End Original Message ------------

dear sir,
our Klenzaids group of companies involved in the manufacturing of pressure vessel. so i need asme standard. so plz send this on my e-mail



    
 
 Reply 
 
Sasaki
Sasaki
08:19 Jan-22-2004
Re: ASME Standard for spot Radiography
I think your interpretation is correct.

I have not ASME-2001 by my side now, but as far as I remenber that UW52 specifies only "rounded" indication as acceptable discontinuity in non-critical joint.

As for "L", the aligned or cued indications apart each other more than "3L" can be considered as single, independent and separate, discontinuity.

Remenber that there is a definition of "rounded" indication in ASME, and "t" is not plate thickness but "weld thickness".
See the "INTERPRETATION" of the UW52 that clarifies more in detail, if any.

Interpreting the nature of "rounded" indication governs the acceptance judgement; e.g. the indication of 40 mm dia. of rounded indication will be unacceptable if it is judged incomplete fusion.

Now, I hope all is clear.

Regards,


    
 
 Reply 
 

Product Spotlight

Navic - Steerable Modular Automated Scanner

The Navic is a modular, motorized, steerable scanner designed to carry multiple attachments used
...
in various scanning and inspection applications. The Navic is capable of weld scanning (girth welds and long seam welds), automated corrosion mapping, and tank scanning.
>

FD800 Bench Top Flaw Detectors

The bench-top FD800 flaw detector range combines state-of-the-art flaw detection with advanced mater
...
ial thickness capabilities. Designed for use in the laboratory these gauges are the tool you need for all your flaw detecting needs.
>

TESTD-PT SYSTEM

Pulse thermography is a non-contact test method that is ideal for the characterization of thin fil
...
ms and coatings or the detection of defects. With a remarquable short test time and a high detection sensitivity, the Telops TESTD-PT is the perfect tool for non- destructive testing. With such high frame rates, it is even possible to investigate highly conductive or diffusive materials.
>

EKOSCAN Phased Array

In order to always fit your needs, EKOSCAN can manufacture any type of UT transducer, either convent
...
ional or Phased Array. As an ISO 9001: 2015 certified company, EKOSCAN is extremely careful as far a material selection and manufacturing processes are concerned. Our probes guarantee our customers the benefits of latest innovations regarding piezo-composite, backing, impedance adaptation layer, etc. Specific probes for hostile environment: high temperature, high pressure, corrosive environment,etc. Specific probes designed to fit your specific application: optimization of every parameter to guarantee you the best detection.
>

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