×
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

Min fillet weld size

Min fillet weld size

Min fillet weld size

(OP)
Does anyone have any ideas to how you would size fillet welds around wrapper plates to a pressure vessel that is also in cyclic service? Also how would the fatigue stresses be calculated?
For example - a horizontal vessel on two supports with wrapper plates.
The vessel supports have been checked to PD5500 annex Y, however, there is no guidance to the sizing of welds. In theory the wrapper plate need not be welded to the shell but as this vessel is going on a FPSO it would certainly receive some loading. At present I can only check the welds for shear loading.

Appreciate any inspiration
Thanks in advance

RE: Min fillet weld size

If your vessel is not a micro vessel or a giant one I would make a fillet leg of 8 mm, supposing your plate is 8 to 12 mm thick, as most common.
As you correctly state this weld has practically no stress, so its size is related to that of the joined plates (not too small and of course not more than plate thickness).

prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design

RE: Min fillet weld size

(OP)
The vessel is is 4.2m dia at 37 thk
the wrapper plate is 37thk

What would you suggest?

ASME suggest a min of 1/4"

RE: Min fillet weld size

Well ASME minimum is really a minimum!
With your thicknesses you could be generous using a fillet leg of 12, just to be sure that it cannot be done in a single pass: in this way there is better assurance of correct adhesion to base metals.

prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design

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