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

Nafta Hydrotreating: Hydrogen Blistering in A106 GrB pipe?

Nafta Hydrotreating: Hydrogen Blistering in A106 GrB pipe?

Nafta Hydrotreating: Hydrogen Blistering in A106 GrB pipe?

Hi, recently we carried out a thickness measurement of a PIPE by ultrasonics and find low values respect to the nominal, the problem, hidrogen blistering of a 12 months pipe, probably the pipe was inadecuate A53.
Now the question is, what is the better method or test in order to differentiate a A53 from A106 Gr.B pipes? if The chemical composition is the same.
By other side, you know about A106  Gr.B that has failed by blistering? where begin the critical range of H2S concentration that could be harmful for whatever of those materials?

RE: Nafta Hydrotreating: Hydrogen Blistering in A106 GrB pipe?

A106B has higher Si, though I do not think there is a nondestructive technique (portable fluorescence or spectroscopic PMI devices) that can differentiate.  If you have NACE Refin*Cor database, there may be some data on Hydrogen Induced Damage of pipe.  I believe I know of only one case reported by a Middle East refinery. It would be very rare but it could be possilbe in very severe hydrogen charging environment. A naphtha hydrofiner is not typically very severe though.

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