×
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

Level of hi-low in circunferential joints

Level of hi-low in circunferential joints

Level of hi-low in circunferential joints

(OP)
Hi dears, could you please tell me if according to API-1104, DNV, etc. the range for hi-low must be indicated in the wps and being a essential variable?
 
A client was asking about qualifying a coupon for minimum hi-low and one for the maximun hi-low in order to have a range qualified, but how does the level of hi-low affect in a welded circunferential joint?
 
Also in order to avoid hi-low levels to exceed the range we must to make sure the correct ovality of the pipes.
 
Thanks for your time and help

 
Eduardo Calva

 

RE: Level of hi-low in circunferential joints

Eduardo,
Misalignment (Hi-Lo) is not an essential variable of API 1104 but the code does have a maximum allowed (1/8" - 3 mm)
You could add that to your WPS for information purposes.
Misalignment is undesirable as it can make it very difficult for the welder to fuse both edges and Lack of Root Fusion is a rejectable defect,
Regards,
Kiwi

RE: Level of hi-low in circunferential joints

The 1/8" misalignment is predicated upon the wall thicknesses being equal.  Larger variations are permissible as described in API 1104 Section 7.2

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