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!

*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.

Jobs

Dear All Large dia Welded pipes

Dear All Large dia Welded pipes

(OP)
Dear All

Large dia Welded pipes supplied to A 928 Class 1 .These pipes are rolled from astm a 240 with plate thickness
at near to 87.5% of specified nominal thickness of Pipes.Is this acceptable practice as the wall thickness of finished pipes will be uniformally
less in thickness but within minus 12.5% tolerance
Thanks in advance
Sri

RE: Dear All Large dia Welded pipes

Another way to look at this is when you order pipe it should be at nominal thickness where min wall required by Code + 12.5% = nominal thickness.

RE: Dear All Large dia Welded pipes

Yes, this is quite common practice in the industry due to the cost of stainless steel.

RE: Dear All Large dia Welded pipes

If you are buying a large quantity, and working directly with the mill, it is worth asking to see their procurement spec and see what minimum thickness they are requiring. I have seen mill cut it too close and end up with spots that are under wall, and then hope that the user is desperate enough to take it.
Even in the tubing business where we work +/-10% we order strip at -6% of nominal. This is standard practice.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Dear All Large dia Welded pipes

And then along comes ASTM A1085 which specifies full wall again.

RE: Dear All Large dia Welded pipes

Buggar, that is called min wall product, and in that case they had better order strip that has a min thickness a few percent above the ordered wall. It is all in the details.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

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


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