×
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

Backwelding thearded piping for hazardous chemicals

thread174-11897

Backwelding thearded piping for hazardous chemicals

Backwelding thearded piping for hazardous chemicals

(OP)
what is the standard for backwelding thearded piping for sulfur dioxide  ?

RE: Backwelding thearded piping for hazardous chemicals

If there's any question at all, you should check with your local inspection authority. I'd say the requirements would be the same as for other pressure piping applications - registered welding procedure, licenced welder, and all exposed threads covered by the weld.

RE: Backwelding thearded piping for hazardous chemicals

wwtp,

It is OK and a good idea for threaded pipe conveying any hazardous or dangerous fluid and gasses.

ASME B31.1 (1995) both permits and encourages  what is called "seal welding" (See section 111.5 and 127.4.5)

Bear in mind that you have probably ruined the fitting for any possibility of dis- assembly.

Oh, and a thought process should also take place..... Why have threaded fittings in that system in the first place ? Why not make the entire system socket-welded ?

Good Luck !!!!


MJC

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

White Paper - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. 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