×
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

Boiler Steam Drum Tubesheet Damage

Boiler Steam Drum Tubesheet Damage

Boiler Steam Drum Tubesheet Damage

(OP)
Hi everyone. I'm working on evaporator tubes replacement for my package boiler. During removal of a tube stub from the steam drum, we accidentally damaged the tubesheet while grinding off the tube stub. We used a small grinder to grind off the tube stub because we don't have a tube cutter, and also we're not confident of using cutting torch to remove the tube stubs. After assessing the damage, we found that the grinder's cut is 5mm deep.

My question is, what options do I have to repair this damage? Our tube attachment is expanded and flared.

Steam drum material: A516-70
Steam drum tube hole diam: 50.8mm
Tube material: A192

Really appreciate your comments. Thanks.

RE: Boiler Steam Drum Tubesheet Damage

ashaari;
You can locally weld repair this damage without the need for PWHT, and re-machine the tubeshhet face to re-establish the hole geometry for flaring.

For welding you need to follow the repair requirements in the National Board Inspection Code (NBIC) and specifically follow Alternative Welding Method 1. Does the repair organization have a valid Certificate of Repair from the National Board?
 

RE: Boiler Steam Drum Tubesheet Damage

(OP)
Thanks very much metengr for your reply, and answering my question. Just to answer your question, yes, the repair organization has a valid certificate of repair. My intention was to double check their procedure against normal practice. 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!


Resources