Vert Vessel-Support Legs

Some key elements are missing:
How heavy is the liquid (if any) in this vessel?
How many legs?
Seismic zone? Wind loads?

1) Liquid Sp Gravity : 01

2) Leg Qty:04 MOC :SS304 Leg Size : 150 NB Sch 40

3) Wind speed: 140 Kmph

4) Seismic Zone : IS873 (India)

Hope this helps.

Regards

ASD23789

Dear asd23789

Greeting to you

First: about thickness of lower torispherical head

by using appendix 1 equation 3 & fig. (b) t = PLM/2SE-0.2P

WHERE p = internal design pressure = 0.162 MPa . and you must increase the static head due to height which equal TL to TL length of vessel + depth of upper head and lower head ( assume 2*800 = 1600 mm check on your case) + 30% for safety

so static head = dinesty of internal fluid (1000 kg/m3) * height ( 8.800 m) * acceleration (10 m/s2) = 0.088 Mpa

so the net internal design pressure = 0.162 + 0.088 = 0.25 MPa

M Factor depending on L/r (in case of torispherical) review fig (b). I will take it (1) but you must check it in your case according to L/r

E joint eff. ( take it 0.85 spot)

S MAXIMUM ALLOWABLE STRESS (assume head material SA-516 gr.70 ) = 138 MPa

FROM EQUATION 3 appendix 1 t (thickness) = 2.4 mm ( minimum required thickness) + C.A ( 3 MM) = 5.4 MM TAKE nominal thichness = 6 mm ( as minimum)

SECOND : you can use nozzle at the bottom but you must check using WRC107

third : if you mean that the nozzle will be no opening that there is no extension piping from this nozzle - like handhole or inspection hole - you do not need to check it with WRC 107 , you must only check by area compensating calculations in UG.37 , and you do not have to do the check in UG.45 if there is no extension piping from this nozzle.

if there is extension piping from the nozzle you must do all calculations .

Dear blackpanic73 Sir,

Thanks for you r reply.

But you mentioned 30% for safety. will you please explain it?