Contact US

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

Cracking in Refractory Lined Steel Stack

Cracking in Refractory Lined Steel Stack

Cracking in Refractory Lined Steel Stack

We recently discovered cracking in a steel stack that is part of a gas turbine/waste heat boiler unit at a refinery.  The stack is only in service when the gas turbine is operating with the waste heat boiler shutdown (i.e. a bypass or auxiliary stack).

The stack in question is 9 ft diameter x 60 ft high.  The stack is fabricated out of 1/4" thick A285-C plate and is refractory lined.  Steel temperature during operation is normally below 400’F.  The stack appears to be conservatively designed for its operating conditions.  Excessive vibration is not evident.

The majority of the cracks are located near circumferential seams (in or near the HAZ running parallel to the weld), although some cracks run transverse to welds and others are in the base material remote from welds in various orientations.  Plate corrosion has been minimal (confirmed by UT).

One thought that we’re exploring is some sort of external environmental cracking at locations of coating failure, although there is no obvious source for an environmental cracking situation.  Does anyone have experience with similar cracking in a stack (or stack-like) structure.  Any insight would be appreciated.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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