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Operation of blind flange

Operation of blind flange

(OP)
Hi Everyone,

Please refer the attached file.
Can anyone suggest me how to design a davit arrangement for a pad type nozzle with blind flange on bottom of dish head?
The nozzle mark N2 can be shifted to maximum distance of 165mm from centre.

Awaiting a prompt response.

Regards,
Balaji

RE: Operation of blind flange

You cannot use a davit as such. You will have to think of something else although it looks like there are lifting handles already on the blank flange so you must be thinking of using them!!

RE: Operation of blind flange

I agree - looks more like you need some sort of sliding rails arrangement to lower the manhole onto and then slide out sideways. Make sure your studs are fairly long.

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

RE: Operation of blind flange

(OP)
Hey thanks for the reply.
Handles locations can be changed, it can be welded on side of blind flange.

RE: Operation of blind flange

(OP)
Hi Littleinch,

Trolley beam arrangement can be provided but this setup will be expensive and is not acceptable for client.

RE: Operation of blind flange

" is not acceptable for client".

hmmm, difficult client eh? Well tell him he needs to start weightlifting.

don't see why this is "expensive" though, but clearly we only have a very small snapshot of the design arrangement.

That recessed flange arrangement doesn't really give you any means of attaching any clamps, but maybe you could attach 4 pad eyes and 4 lifting lugs and then just attach 4 cables and then lower it?

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

RE: Operation of blind flange

Use a pair of removeable air tuggers/come-alongs to lift the blind up to the point of stud engagement on the back side of the blind, they run it up with impact, then tighten to plant spec's.

Good luck
rick

RE: Operation of blind flange

(OP)
Hi Littleinch,

Cables wires? I have to think about it
Is there any design for these supports as per any design handbook?
Can i go for hinged type?

RE: Operation of blind flange

(OP)
Hi rtmorgan,

A rough sketch would be helpful for the air tuggers arrangement you suggested.

Thank you

RE: Operation of blind flange

enfield - we're working blind here. I have no idea what height there is, room available, how often you want to remove this thing, how much space.

however I don't think a hinge will work for this type of flange and won't be cheap.

Can't you just get a tele handler in?

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

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