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 -

1207 views
Technical Discussions
Antonio Sousa
NDT Inspector
ALSTOM PORTUGAL, Portugal, Joined Nov 2003, 4

Antonio Sousa

NDT Inspector
ALSTOM PORTUGAL,
Portugal,
Joined Nov 2003
4
11:15 Feb-12-2010
RT - Number exposures

I need to know if are correct when make a RT Procedure according ASME V, put the table A4 from EN 1435 for determining the quantity of exposures at the piping.

 
 Reply 
 
Slawomir Mackiewicz
Slawomir Mackiewicz
21:11 Feb-16-2010
Re: RT - Number exposures
In Reply to Antonio Sousa at 11:15 Feb-12-2010 (Opening).

Dear Antonio

Mixing of requirements of different standards is not a good practice from formal as well as from technical point of view. Each standard requirement is a part of a complex system of interrelated requirements and rules which form the standard. You shouldn’t take them individually without considering the whole.

In your case, if you draw RT procedure according to ASME V you should follow its rules in all respects, also in determining the number of exposures for circumferential welds. So, instead of referring to Fig. A.4 in EN 1435 you should use the clause T-271.2 of ASME V, Article 2. For example, for typical double-wall exposure, single-wall viewing technique (Exposure arrangement D), it requires a minimum 3 exposures taken 120 deg to each other.

Of course this is only a MINIMUM and you have to remember about all other rules of ASME Code. Specifically, in this case, you have to check if your RT technique ensures radiograph density limitations according to clause T-282.1. In some cases of heavy wall piping you may not be able to meet this requirement with only 3 exposures. You may find some help on the subject on my web site: http:\\www.ndtsoft.eu

Best Regards

Slawomir Mackiewicz

 
 Reply 
 

Product Spotlight

Micro CT

nanoVoxel series has nano-scale resolution upto 500nm by using high voltage X-ray source (from 80-
...
300 kV) with micro/nano focal spot and highly sensitive flat panel detectors and unique Optical coupling detector.
>

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.
>

IRIS 9000Plus - Introducing the next generation of heat exchanger inspection.

Representing the seventh generation of the IRIS system, the IRIS 9000 Plus has nearly 200 years of c
...
ombined field inspection experience incorporated in its design. This experience combined with a strong commitment to quality and a history of innovation has made Iris Inspection Services® the undisputed leader in IRIS technology.
>

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

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