×
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

MAWP of 316/316L Dual-Marked Flanges?

MAWP of 316/316L Dual-Marked Flanges?

MAWP of 316/316L Dual-Marked Flanges?

(OP)
Hi guys. I received an interesting question today and I think I know the answer but I want to hear what you think.

For a P2.2/P2.3 material ASME B16.5 flange that is dual-marked as 316/316L, what would you use as the allowable stress at, say, 200° F? The problem is the two materials have different MAWP's. At 200 F, 316 has MAWP of 240 psig and 316L has MAWP of 195 psig.

I am not aware if the B31 Codes address this question.

What say ye? Thanks guys!

RE: MAWP of 316/316L Dual-Marked Flanges?

Use the MAWP of 316. Refer to ASME II-D, mandatory appendix 7, article 7-210 for more details.
It's quite common and happens more often (e.g. 304(L))

RE: MAWP of 316/316L Dual-Marked Flanges?

What the "316/316L" is telling you is that this alloy batch [heat] meets the mechanical testing minimums for full-strength 316(plain) AND has sufficiently low carbon content to also meet the limited carbon requirement of 316L. If your parts are made of dual-certified stainless - 3xx/3xxL - make sure that this is noted in the design calc's. You gain about 10% strength [thus 10% more 'effective thickness'] while maintaining the improved corrosion and welding characteristics of Low-carbon.

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