Plate without flange
Plate without flange
(OP)
Any other way to install perforated plate without flange in pipe (for better economics)
ahmad
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RE: Plate without flange
Do you ever want to clean the pipe?
Do you EVER anticipate needing to change the plate's pressure drop or nbr of holes?
Why would you NOT want to use two flanges and a plate?
RE: Plate without flange
RE: Plate without flange
If welded inside of a pipe, you would still need a flange or weld to reconnect the pipe.
RE: Plate without flange
RE: Plate without flange
Is it a good idea? That's up to you if you consider the very good points racookpe makes. Any break, blockage or desire to modify the plate then you have to cut it out, but that's your risk.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Plate without flange
Putting the orifice plate in an existing weld is a great idea. It will be super funny to the next guy who comes along and can't figure out where the pressure drop is coming from, or if you can trick him into pigging the line. Funny to me. Not so much for him. I once spent about a month on the pressure drop of a sieve bed to find out that a tee down stream of the bed had been filled with a metal gauze to make a filter. No indication of it on the outside. That was really funny.
RE: Plate without flange
RE: Plate without flange
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Plate without flange
OK, so they do that. Now the two welds are on both sides of the orifice plate? How do you complete the joint while holding the orifice plate between the two sides of the sliced pipe if the orifice plate is the pipe OD? Pipes are not all that thick-walled you know, and the thin pipe wall does not give you the bearing surface to hold back the forces generated by the delta-P required as the purpose of the plate in the first place.
If the Orifice plate exceeds the pipe OD, how do you machine flat the two pipe ends to get two mating surfaces with a weld prep allowing both full-penetration welds at a lower cost than two simple RFSO or RFWN flanges? Do you accept two fillet welds on both sides, relying on the "full it up with weld" fillet welds to prevent fluid loss?
The CONCEPT is bad. Don't do it. Don't accept it.
RE: Plate without flange
What if orifice is slightly less than Pipe inner dia , then a ring welded on both side/one side of orifice, and then to weld the pipe pieces.
John165