×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Weld repair to pitting on API 5L X65 pipe flange

Weld repair to pitting on API 5L X65 pipe flange

Weld repair to pitting on API 5L X65 pipe flange

(OP)
I have some weld repairs to make to an api 5l x65 pipe flange face, the flange faces is pitted.

Was thinking of using a 7018 rod to do weld metal buildup and then machine the flange face.

Are there any specific heat treatment requirements or pre-heat / interpass temp requirements ?

RE: Weld repair to pitting on API 5L X65 pipe flange

If this is an API flange, likely to API 6A, weld repairs would only be allowed on weld fabricated ones.
In your description this is not an acceptable weld repair, but should be considered a weld overlay to recharge the thickness of the flange face.

* Finding a solution is great * Knowing how to implement it is fantastic * Believing it is the only one and best is naive ?

RE: Weld repair to pitting on API 5L X65 pipe flange

What does your qualified welding procedure specification say?

Steve Jones
Corrosion Management Consultant

www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

RE: Weld repair to pitting on API 5L X65 pipe flange

Hi Jon Iveswavey2

API 5L is a reference for the technical specification of pipe in petroleum and natural gas transportation and has nothing to do with the flange.

at the first you shall refer to project/client specification, by reason of that flange body and face repair is not allowed in some of specification.

if there is not any project/client specification, manufacturing standard shall be consider such as ASTM A105,ASTM A694,ASTM A691,MSS-SP75,etc. (refer to flange certificate).

Repair length/thickness restriction stated in the code/std.

If repair allowed by client/code/std. low hydrogen electrode such as 7018 or GTAW rod such as 70S-X shall be used. pre heat is very important, for low alloy CS flange (50~100 oC) is Ok depend on the dimension of flange due to weld rapid cooling may be happened by reason of material heat sink.

Finally, you shall consider all welding technical details in usual repair/buildup WPS.

wavey2

RE: Weld repair to pitting on API 5L X65 pipe flange

If you've got access to the face of the flange why not just cut the flange off and weld in a new one? Or throw it away into scrap and buy a new one?

The flange is likely to be ASTM A694 F65 to MSS Sp-44.

This sounds like a wholly bad idea to me - flanges are not really designed to be weld "repaired" like this.

Is this an old flange someone has found knocking around and wants to use it? how otherwise did the flange face get pitted?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

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

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