×
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

NACE MR0103 weld procedures for Duplex SS

NACE MR0103 weld procedures for Duplex SS

NACE MR0103 weld procedures for Duplex SS

(OP)
MR0103-2007, Section 2.8.2(f) for weld procedures for Duplex stainless steels states "The WPS shall not allow welding of components with wall thicknesses that deviate by more than 20% from that of the PQR specimen.

This seems quite restrictive compared to normal ASME allowance of 2X the wall thickness of the PQR specimen.  Does anyone know if this is correct, or if it is really supposed to be 200% (same as ASME) ?

Thanks,
bangrod

RE: NACE MR0103 weld procedures for Duplex SS

It is correct and is accounting for the various microstructural developments that can occur between thick and thin welds.  You will also note the other restrictions in items a) to e) of the same subclause.  The NACE document is, within reasonable tolerances, keeping it to "you weld it as you qualified it" since ASME IX is not concerned with phase balance and corrosion issues.

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

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