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shanii
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Join Date: Jan 2009
Posts: 43

Blind Bonnet flange

04/20/2010 7:15 AM
Blind Bonnet flange
I got an ITB which has an instruction i.e To enable process line cleaning butt-welding-end control valves shall be supplied with Blind bonnet Flange, together with gaskets sufficient for three changes. what does BLIND BONNET FLANGE mean?
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Anonymous Poster
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Re: Blind Bonnet flange

04/20/2010 8:52 AM

If you take the "guts" out of a valve, the valve can't be isolated and, the remainder of the system must be re-pressurized while the valve is without it's guts, a Blind Bonnet Flange is bolted onto the part of the valve's body (bonnet) where the guts had been taken out
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