×
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

LNG piping

LNG piping

LNG piping

(OP)
Thanks for the input to all. OK here is the situation, we will be welding  TP304L piping with operating temps down to -162C. Relevent codes are B31.3 and CSA Z276. It looks as though B31.3 allows no impact values required for austenitic S/S to - 101C. Will I need to design a new weld procedure with Charpy's to accommodate the lower temperatures?

RE: LNG piping

You will have to qualify a new WPS meeting both B31.3 and ASME IX at, for all practical purposes, -320 F (temp. of liquid Nitrogen). Only the deposited weld metal need be impact tested. Toughness of the deposited weld metal is adversely influenced by ferrite content and impurities in the deposited weld (mainly Oxygen).  

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