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


API 650 Low Type Nozzle

API 650 Low Type Nozzle

API 650 Low Type Nozzle

Hello Everyone,
I have a 36ā€ man-way close to the floor of an API 650 Tank. As per Fig. 5.8, we need to have a low type re-pad for the man-way, but the manufacturer says an ordinary (circular) re-pad is ok, as long as it provides the reinforcing required as per Para. 5.7.2 and distance between weld joints of re-pad and floor is not less than dimension ā€œCā€ in Fig. 5.6. My question is whether the low type reinforcing plate as per Fig. 5.8 is used also for increasing the strength of the area between opening and shell to floor connection which is a discontinuity in the cylindrical shell and local bending stresses appear in addition to the normal tensile stresses. I appreciate your responses regarding my concern.

RE: API 650 Low Type Nozzle

Your manufacturer is correct. The code requires reinforcing and weld spacing. Satisfy that and you are good at least for the present.

RE: API 650 Low Type Nozzle

The mouse-hole shape repads are used for weld-spacing (and speed-of-welding) reasons, not for additional reinforcing.

RE: API 650 Low Type Nozzle

Tombstone shaped repads prepare you for much lower costs when you add a secondary bottom, or cut out and replace the bottom. I use them for almost all nozzles regardless of elevation.

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!


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