×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Complete joint penetration (CJP)
3

Complete joint penetration (CJP)

Complete joint penetration (CJP)

(OP)
Hi Experts.

To those with great knowledge and experienced. I just want to clarify a Build Up Beam Fabrication with join design of Butt Tee joint but full penetration.
My Question is Is there still a required leg size of weld although the process is CJP. Please quote with reference if there is an existing code for this issue
Thank you so much... Cheers.pc2

RE: Complete joint penetration (CJP)

You do not specify a weld size for a CJP weld. By definition, the weld size is equal to the thickness of the part being welded.

RE: Complete joint penetration (CJP)

Calmox:
If someone actually designed that weld joint btwn. the web and the flange of a built-up beam, they would likely discover that a CJP weld was not really required. The CJP weld joint is seldom actually needed, it just seems to be a fall-back detail for those who don’t know any better. After all, that’s what hot rolled beams look like, but that’s due to the nature of their manufacture, not a real stress need. The CJP weld involves the cutting of bevels on the web plate. These bevels must be wide enough (open enough) to allow good welding at the root passes, depending upon your welding process and equipment, and this determines the weld size, amount of filler metal needed, number of passed needed, etc. This is all part of the joint design. Then, there is likely a small reinforcement fillet in the 90̊ corners btwn. the web and the flange, because you really can’t make the weld otherwise. And, there is also the question, should you back gouge the root/land, to sound weld metal, before welding the root on the second side. The CJP weld joint is usually more expensive than the required fillet welds on both sides of the web to the flange.

The American Welding Society (AWS), Lincoln Electric, and others have good literature on these subjects. Get some of this material for your own edification.

RE: Complete joint penetration (CJP)

also a good location for a tri-axial stress state and possible brittle fracture...

Dik

RE: Complete joint penetration (CJP)

(OP)
thank you so much guys such a great help for your great knowledge.. cheers..

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Reshoring Prototyping and Production
In this whitepaper, we'll provide insight into why and when it makes sense for U.S. manufacturers to reshore prototyping and production, and how companies can leverage the benefits of working with local design, prototype, and manufacturing partners during the pandemic and beyond. Download Now
Engineering Report - Top 10 Defect Types in Production
This 22-page report from Instrumental identifies the most common production defect types discovered in 2020, showcases trends from 2019 to 2020, and provides insights on how to prevent potential downtime in 2021. Unlike other methods, Instrumental drives correlations between a variety of data sources to help engineers find and fix root causes. Download Now
White Paper - Addressing Tooling and Casting Requirements at the Design Stage
Several of the tooling and casting requirements of a part can be addressed at the design stage. If these requirements are not addressed at the design stage, lot of time is spent in design iteration when the design reaches the die caster. These design issues lead to increase in time and cost of production leading to delay in time to market and reduced profits for the organization. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close