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

2" Low type nozzels

2" Low type nozzels

2" Low type nozzels


If I want to install a 2" nozzle lower than the minimum distance from tank bottom to center of nozzle (Hn), as indicated in table 5.6a DIMENSIONS FOR SHELL NOZZLES, in theory I could use a low type nozzle, meaning using a special reinforcment plate.

However reinforcing plates are not normally used for nozzles less than NPS 2. In fact, the same table 5.6a doesn’t give minimum heights for low type nozzles NPS 2 and smaller. It only refers to note h, which in turn refers to figure 5.6 which gives minimum weld requirements for openings. For low type openings, it sends you right back to table 5.6a, which makes me believe that you cannot have a NPS 2 low type nozzle or smaller.

What is the common industry practice for NPS 2 low type nozzles?

What would be the minimum suggested distance from tank bottom to center of the nozzle in this case?


RE: 2" Low type nozzels

The low height will be determined by weld spacing. 5.7.3 I think.

RE: 2" Low type nozzels

This means I must put a re-pad, even though the nozzle is less than NPS 3? (normally nozzles less than NPS 3 do not need reinforcement) In order for the nozzel to qualify as low type, it must have reinforcemnet (the "low type" refers to the re-pad, not the nozzle itself)

RE: 2" Low type nozzels

See dimension "C" in figure 5.6. No repad is needed - you have a "S/N" type nozzle.

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! Already a Member? Login


White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now

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