Flange load 1

[asifraza0]

Dear Experts:

Need your advice:
On top of a 1000 gallon vessel, there is a 8" 150 lbs SORF flange
I'm planning to install a 6" rotary airlock valve with an approximate weight of 300 lbs
Questions : Can the 8" flange take the load of the rotary valve or do I need additional support?
Thanks
Araza

Asif Raza

 

[LittleInch]

The flange can take the load absolutely no problem.

The vessel on the other hand...... That's where your issue lies and is not possible to guess these things, but needs proper calculation and analysis. "Vessel" could be anything from a steel tank made of 1/8" plate to a pressure vessel made from 1" thick steel.

Is this horizontal or vertical?
How are you mounting a 6" valve on an 8" nozzle?
what is the current re-inforcement or attachment detail of your ("slip on?) flange onto the vessel?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[asifraza0]

Thanks Littleinch:

The vessel is vertical
I'm finding out the thickness and also in touch with the tank vendor for confirming the load
There is no re-inforcement for the 8" flange
my plan is to fabricate a transition spool piece to mate 6" valve to 8" valve
Araza

Asif Raza

 

[KernOily]

You really need to get someone to do this for you who has the NozzlePro or some similar other finite element software. Anything else is really just guessing and you won't have any backup for that. This is only a 1/2 hour calculation in NozzlePro. If you are working with an engineering contractor already, just have them do this for you. Most of them have the software.

 

[MJCronin]

More questions:

Is the vessel being re-used ? What was the original purpose of the nozzle ?

Can you take a couple of pictures of the nozzle and post them ?

Is the vessel a "pressure vessel" designed to one of the pressure vessel codes ? If so, what is the design pressure and materials ?


MJCronin
Sr. Process Engineer

 

[racookpe1978]

OK, so the vessel is vertical.

What diameter vessel, what wall thickness?
What is the angle of the nozzle centerline? Straight up? Out at a 90 deg? Angled from the PV head?

Is the weight centered on the nozzle (what is length of weight CG from the vessel wall?)

 

[LittleInch]

Also don't neglect the weight of the spool piece - if its two flanges with a reducer it won't weigh nothing and could add 30-50kg to the weight

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.