×
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

Head Fabrication

Head Fabrication

Head Fabrication

(OP)
In my company standard, head shall be fabricated from 1 piece. However, the segmental plates may be inevitable for large diameter of vessel.

Please advise me about the additional inspection program for QA/QC during head fabrication.

RE: Head Fabrication

If the dish head is formed from the welded plate then you may have to check the following as a minimum


1) NDE (radiography of the weld Seam)
2) WPS/PQR
3) If the client has called for hardness, then check hardness


RE: Head Fabrication

(OP)
bmoorthy,

Thanks for your comment. For further understanding, please advise me in the following queries :-
- Should we confirm RT after forming?
- Should we confirm MT/PT after forming?
- What is the acceptable hardness?

In my case, head material is 2.25Cr-1Mo steel. Vessel diameter is 2 to 3 m (hemispherical head).

RE: Head Fabrication

Pan ( mechanical )
I suggest as follows :
1) RT before forming
2) RT after forming
3) MPI after stress relieving
4) Acceptable heardness for 2.25 Cr-1Mo 225 BHN

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!


Resources