ASME code standars for lifting padeye design...
ASME code standars for lifting padeye design...
(OP)
Looking for literature regarding this subject. We are building nitrogen storage tanks for off-shore use and need to engineer the padeyes. I have been looking around for code standars but have not found this particular subject yet. Any help would be appreciated,
regards,
Chinus
regards,
Chinus





RE: ASME code standars for lifting padeye design...
Do a search and you will fine the following
RMPE (Structural) 03/13/03 (posted 10/28/02) 17 replies
Tensile capacity/minimum engagement
Mechanical Engineers Area - Piping & fluid mechanics engineering Forum
rrickey (Mechanical) 01/19/03 (posted 01/15/03) 2 replies
Has anyone had experience using MecaConsulting's Lifting lug program?
Engineering Codes & Standards Area - ANSI (standards) Code Issues Forum
frostrobn (Mechanical) 01/16/03 (posted 01/15/03) 1 replies
Applicable Specs. for lifting lug design
Structural Engineers Area - Structural engineering other topics Forum
frostrobn (Mechanical) 01/15/03 (posted 01/15/03) 1 replies
Applicable Specs. for lifting lug design
Structural Engineers Area - Structural engineering other topics Forum
henerythe8th (Structural) 01/10/03 (posted 01/09/03) 4 replies
hoisting/lifting eye
Leonard@thill.biz
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RE: ASME code standars for lifting padeye design...
regards
RE: ASME code standars for lifting padeye design...
RE: ASME code standars for lifting padeye design...
E. F. Megysey
Pressure Vessel Handbook
Pressure Vessel Handbook Publishing Inc.
P.O. Box 35365
Tulsa, OK 74153
Leonard@thill
www.thill.biz
RE: ASME code standars for lifting padeye design...
regards,
RE: ASME code standars for lifting padeye design...
RE: ASME code standars for lifting padeye design...
I woudl suggest you to consult the BS 5500. I´m sure that you will find rules to calculate and design the pads.
Regards,
RE: ASME code standars for lifting padeye design...
The lift lug is a non-pressure attachment, & is not in use when vessel is operating. Therefore, the design parameters should consider safe load conditions.
For design of the liftlug & attachment weld to vessel, we use the same factor of safety as for MSS Under the Hook Lifting device. It is 3:1 on yield. This translates to using AISC structural allowables + a 1.8 safety factor.
We also include an impact factor to account for dynamic loading during crane lift. Unless you know, or have control of, the lift crane, I suggest a 1.2 or 1.25 impact factor.
Per the above, design load = load x 1.8 (MSS factor) x Impact factor. Compare resultants to AISC allowables.
Unless you issue a required lifting schematic, showing required rigging arrangemen. consideration incorporation of all possible sling angles & the possible resultant out-of-plane loading on the lifting lug.
As to distribution of loads & stresses in the vessel wall, this gets a little more complicated to offer in this brief format. We use both FEA or known reliable emphircal methods. If not familiar with this aspect of design, I suggest you consult with a knowledgeable consultant or design source.
RE: ASME code standars for lifting padeye design...
RE: ASME code standars for lifting padeye design...
COMPRESS USER'S: "PRESSURE VESSEL LIFTING LUG ANALYSIS" go to Photo Gallery the very last two Photo for the PRESSURE VESSEL LIFTING LUG ANALYSIS SHEET. AT:
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Leonard Stephen Thill
Leonard@thill.biz
www.thill.biz