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 -

ACS-Solutions GmbH
develop and manufacture hi-tech devices for Ultrasonic Testing

903 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.

    
 
 
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

    
 
 

Product Spotlight

Semi-Automated Phased Array Immersion System for Small Composite Parts

Turn-key semi-automated system as an improved and affordable solution for inspection of small comp
...
osite parts. Includes support table, immersion tank, scanner, PA instrument, PC, Analysis software, database, wedge management and other options.
>

MUSE Mobile Ultrasonic Equipment

The MUSE, a portable ultrasonic imaging system, was developed for in-field inspections of light-weig
...
ht structures. The MUSE consists of a motor-driven manipulator, a water circulation system for the acoustic coupling and a portable ultrasonic flaw detector (USPC 3010). The MUSE provides images of internal defects (A-, B-,C- and D-scan).
>

Cygnus 6+ PRO Multi-Mode Ultrasonic Thickness Gauge

The Cygnus 6+ PRO thickness gauge is the most advance gauge within the Cygnus range with key featu
...
res including: comprehensive data logging; A-scan and B-scan display; manual gain control; Bluetooth connectivity; and much more. With its unique dual display and three measuring modes (Multiple-Echo, Echo-Echo and Single-Echo), this surface thickness gauge offers maximum versatility for inspections.
>

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

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