when?the?pressure?between?the?pipe?which?do?not?need?to?adjust?the?pressure?according?to?requirement?of?the?system?in?the?thernmal?power?plant?is?large,?we?often?set?throttle?orifice?in?the?pipe.?when?the?orifice?plate?we?set?is?wrong,?it?may?cause?vapor-liquid?two?–phase?flow?in?downstream?pipe?and?it?cause?pipe?severe?vibration.?First?we?should?select?the?right?form?of?throttle?orifice,?and?use?the?computer?to?calculate?the?throttle?orifice.?Second?,considering?stability?of?pipe?system,?we?set?limit?device?or?fix?in?the?pipe?to?constraint?pipe?vibration.
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NSTL
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