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
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
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
the wrapper plate is 37thk
What would you suggest?
ASME suggest a min of 1/4"
RE: Min fillet weld size
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