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 -
Mobile-Friendly Implementation in Progress

5565 views
Technical Discussions
David Bunch
David Bunch
21:03 Jan-16-2010
Compound weld joints (37-10)

I have a few questions about compound weld joints. First, what is the main reason for using them? Secondly. I have seen a few diagrams that show the 37 degree portion of the weld extending upwards for 3/4", and the remainder of the weld is at a 10 degree angle. So does this mean that the 37 degree portion of the weld has a fixed height of 3/4" and the remainder of the weld (regardless of thickness) is at 10 degrees?

Here is a diagram that I have been looking at: http://www.globalspec.com/RefArticleImages/8DE033B4047F3F210EE55EDEB387249B_2_CH02_54.gif

    
 
 
Juan Amado
Engineering, Inspection
Arco Industrial, S.A., Panama, Joined Nov 2001, 44

Juan Amado

Engineering, Inspection
Arco Industrial, S.A.,
Panama,
Joined Nov 2001
44
00:38 Jan-17-2010
Re: Compound weld joints (37-10)
In Reply to David Bunch at 21:03 Jan-16-2010 (Opening).

David:

The main reason for using such joints is to minimize the amount of weld metal to be added to the joint. This creates savings in time, weld metal, labor, energy and measures to prevent distortion. This savings must offset the cost of preparing such a joint, which are higher than creating a conventional straight bevel.

The 3/4" dimension, at which the angle of the bevel changes direction, has to do with the fact that at that point the 37.5 angle has created enough of an opening to be able to access the joint with the welding process to be used. This dimension, however, is not written in stone, you should be able to create a joint that is appropriate for what you are doing, but I think you will find that in many cases it will be a nice size to work with.


Hope this helps.

Best regards,
Juan Amado

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

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1094
05:28 Jan-17-2010
Re: Compound weld joints (37-10)
In Reply to Juan Amado at 00:38 Jan-17-2010 .

David,

As Juan says, on thick material access is required to put in the root, hence the bigger included angle for the bottom 10 - 15mm. Once sufficient access has been made the narrower included angle 6 - 10 degrees requires less weld metal, less runs and potentially a sounder joint.

The compound bevels and the J-bevel are a principal reason for the drive to encoded UT, a combination of automated or semi-automated PA, TOFD and PE. Tandem and zonal discrimination techniques may be required for the steep fusion faces.

    
 
 

ISAFE3 Intrinsically Safe Sensor System
ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the
Vallen-Systeme GmbH
2 Showcases

SONOAIR - air-coupled Phased Array Ultrasonic Inspection System
For highly attenuating materials, the performance of the system is critical. The ultrasonic
SONOTEC Ultraschallsensorik Halle GmbH
5 Showcases 5 Videos Product Video

Wireless TOFD scanner
Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is
Promprylad
6 Showcases 6 Videos Product Video

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
Silverwing
4 Showcases 4 Videos

More Showcases

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