Design or calculations for davits
Design or calculations for davits
(OP)
Does anyone know of a spreadsheet or any information that would take you through a step-by-step process for calculating and fabricating davits or manways?
Steven
Steven





RE: Design or calculations for davits
As for manways, I used ASME VIII calculation for nozzles.
Cheers,
gr2vessels
RE: Design or calculations for davits
RE: Design or calculations for davits
RE: Design or calculations for davits
-look at the stiffness a cantelever beam - using moment of inertia etc... (I usually use a pipe or I-beam)
-then Caclculate the deflection of the beam
-Calculate the maximum moment
-check max shear
-check the above values to allowables
-then I check the attachment "clip" using the design loads (I use Pressure Vessel Design Handbook by Bednar)
-then I check my weld sizes/strength and make sure the vessel can handle it.
-for particularily large covers I will back it up with a quick FEA
As far as manways - it really depends on what you need (required ID, design pressure/temp). It can be a simple pipe with flange, a heavy forged ring with blind tapped holes, a special pressure seal design, or others.
RE: Design or calculations for davits
RE: Design or calculations for davits
By the way, many companies and even PIP standard VEFV1117 have davit details up to 24"-600#. You do not need to waste your time to prove your design if the weight and moment are within these standards.
RE: Design or calculations for davits
RE: Design or calculations for davits
also see 162869
also check PIP VEFV 1118 (1118 is for horizontal manway davits, 1117 is for vertical manway davits)
couldnt find a direct link to #1117 or #1118, however based on this link and this link, you might need to buy the complete 4100 set ..
RE: Design or calculations for davits