Shell plate Thickness 3/16"
Shell plate Thickness 3/16"
(OP)
I'm right now checking a design of 32 ft high and 15 ft wide tank with 1000 bbl capacity.
After running Ametank software , i found shell thickness is 3/16" which is non compliant to API650 standard annex J , for shop assembled tanks.
My client was insisting to approve this design as lower shell plate is 1/4" as he think we will be ok.
I need to know any provision in code that accept this tank with that she'll thickness.
Here are other desgin data.
Specific gravity : 0.61
External pressure Vacuum: 0.4 0z
Internal pressure: 16 oz
Mdmt: -40
I think annex E and F tell something about suck tanks.
Any ideas?
After running Ametank software , i found shell thickness is 3/16" which is non compliant to API650 standard annex J , for shop assembled tanks.
My client was insisting to approve this design as lower shell plate is 1/4" as he think we will be ok.
I need to know any provision in code that accept this tank with that she'll thickness.
Here are other desgin data.
Specific gravity : 0.61
External pressure Vacuum: 0.4 0z
Internal pressure: 16 oz
Mdmt: -40
I think annex E and F tell something about suck tanks.
Any ideas?





RE: Shell plate Thickness 3/16"
RE: Shell plate Thickness 3/16"
Will the tank be pressure tested with water ?
With an operating SG of only 0.61, what is the required wall thickness for pressure testing ?
MJCronin
Sr. Process Engineer
RE: Shell plate Thickness 3/16"
This is presumably based on shipping/handling considerations, not on in-use load conditions. For a field-erected tank, the 0.1875" would be adequate.
I'm not aware of any provision that allows you to waive the thickness requirement if it is in fact a shop-built tank.
RE: Shell plate Thickness 3/16"
RE: Shell plate Thickness 3/16"
I have also checked my design using One foot method using both design fluid thickness and hydrostatic test thickness and both are less than client shell plate thickness 3/16".
Please find attached screenshot and let me know if it makes sense
RE: Shell plate Thickness 3/16"
RE: Shell plate Thickness 3/16"
Our lower plate shall thickness is 1/4" but upper course plates are 3/16" and that complies with 5.6.1.1.
Do you think we need to go for any material testing rwqyirmemt to approve that design .?
I also calculated noozle loads and they are not creating stress on the plates as well.
RE: Shell plate Thickness 3/16"