×
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

API 650 Bottom Plate Layout Four-Plate Joint?

API 650 Bottom Plate Layout Four-Plate Joint?

API 650 Bottom Plate Layout Four-Plate Joint?

(OP)
In an API 650 tank with butt-welded bottom plates, is there anything in API 650 prohibiting four-plate bottom joints, where the four corners of 4 plates all meet in an X shape?

API 650 5.1.5.5 "Butt-Welded Bottom Joints" states "Three-plate joints in the tank bottom shall be at least 300 mm (12 in.) from each other and from the tank shell." But does not specifically mention four plate joints (at least for butt welded bottoms) in any place I can see.

RE: API 650 Bottom Plate Layout Four-Plate Joint?

I would interpret a 4-way joint as two three-way joints that are zero distance apart, therefore, not allowed.

RE: API 650 Bottom Plate Layout Four-Plate Joint?

(OP)
You know, it took me a minute to wrap my head around this, but I agree. I wish that API 650 were a bit more clear about this case, since the fabricator is going to say this verbiage is not definitive.

Thanks for the response!

RE: API 650 Bottom Plate Layout Four-Plate Joint?

There are two (or more) ways to interpret the standard: (1) you can only do what is shown or (2) if it is not expressly denied you can do it. I take the first position. The standard does not ever show a 4-way joint on a bottom. My position to the fabricator would be "show me where it says you can do this" and then "defend it as if you were in front of a judge". Done.

RE: API 650 Bottom Plate Layout Four-Plate Joint?

Well, it could get interesting if they try to explain why two 3-way joints offset a 1/16" of an inch are prohibited, but if they are aligned, they're okay.

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


Resources

White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. 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