×
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!
  • Students Click Here

*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

Jobs

Toe Cold cracking of welds

Toe Cold cracking of welds

Toe Cold cracking of welds

(OP)
Good afternoon to all,
i have a question for you. During maintanace operations of a tank, it's necessary to open a temporary door in the 1° shell course.
After 2 months that door was welded and regularly checked with RT and MT with with no defect, some toe cold cracking appeared in the horizontal seam at 2/3 mm of depth (tk plate 45mm).
What could be the causes of such defects?

Thank you

RE: Toe Cold cracking of welds

Could be resulted from the improper weld procedure or PWHT...
Suggest to have a Material Specialist to conduct a failure analysis for the weld defect.

RE: Toe Cold cracking of welds

How does one "regularly RT" the weld? - the tank was taken out of service regularly?

It would help to know the grade of steel, the product stored, the temperature of the product.

Perhaps not enough preheat and moisture was not driven off during welding, possibly low hydrogen weld consumables were not used or not kept dry. Perhaps caustic attack.

For the original weld, was the back-gouged surface of the root pass and final pass (each side) examined for its complete length by magnetic particle or liquid penetrant methods and 100% RT also?

RE: Toe Cold cracking of welds

(OP)
Thank you to all for your replies, and, as you said, we think that is a problem of improper welder procedure.. cleaning weld seam, temperature maintenance during welding,moisture elimination etc etc..
I will inform you..
Thanks

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 - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. 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