Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login
Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • 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!
Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

LINK TO THIS FORUM!

Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Eng-Tips LinkedIn® Group

Partner With Us!

"Best Of Breed" Forums Add Stickiness To Your Site
Partner Button
(Download This Button Today!)

Feedback

"...Thank you again! I can't tell you how much I and my company appreciate what you've done! I love this place!..."
More...

Geography

Where in the world do Eng-Tips members come from?
Click Here To Find Out!

Eng-Tips Shirts!

Get Eng-Tips Swag
Get your
Eng-Tips Forums
SWAG here!
Home > Forums > Engineering Codes, Standards & Certifications > Engineering Codes, Standards & Certifications > API (American Petroleum Institute) Code Issues Forum

why is it called "hot pass"?Helpful Member! 

thread809-294336
Read More Threads Like This One
duongwe (Mechanical)
13 Mar 11 21:53
why is it called "hot pass"?  
Helpful Member!  MJCronin (Mechanical)
14 Mar 11 8:47
Because when you gaze at an attractive woman, look deeply into her beautiful eyes, try to say something inteligent and watch her smile........ your heart is not getting cold.

Gimmie a star......

   
Duwe6 (Industrial)
14 Mar 11 15:53
My SWAG -- Scientific Wild-A$$ed Guess -- is that in the early days of pipelining, the root was run fairly 'cold' and fast.  This closes up the open gap in the root.  Then comes a hotter, slower pass to tie everything a little better:  the Hot Pass.

If you watch any root when the 2nd [hot] pass is being welded, it does indeed get very hot, and portions of the root may remelt.
DVWE (Petroleum)
14 Mar 11 16:41
The hot pass is intended to remelt the root to a certain degree, and thus eliminating any "wagon wheel tracks" that may be present in the root pass.
Read More Threads Like This One

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!

Back To Forum

Back To API (American Petroleum Institute) Code Issues

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