Interested to Buy Any Domain ? << Click Here >> for more details...
I have a steam flow DP transmitter that has output
swinging. Steam valve is in manual.I have good steam
pressure. The impulse lines have steam tracing on them. The
steam tracing has a hole in it that is blowing raw steam on
the high side impulse line only. Could this be causing the
swinging?
- 1 Answers
- 4903 Views
- Honeywell, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
Answer:
Yes, live steam on an impulse line could cause pressure swings.
Blowing live steam on an impulse line could conceivably heat
the condensate in the impulse tubing enough to boil it.
Even if it doesn't boil, a deadheaded impulse line with have
thermal syphon flow occuring as the hot spot condensate
rises and its place is taken by cooler condensate.
If boiling is occurring, then it could be intermittent
boiling with associated pressure pulses: as the steam
bubble(s) move away from the hot spot and cooler condensate
takes it place.
None of which should be happening in an impulse line.
The high side is 'seeing' these artifacts as forces on its
diaphragm which is creating pressure swings.
Carl Ellis
Measure First
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
Why is it necessary to use compensation leg to measure the liquid level in a closed or pressurized tank?
How can we use feedback signal frm rtd for monitoring and in dcs for controlling ,then which type of rtd is sutaible 2 , 3,4wire and why ?
Explain the working of an electronic level troll.
how to convert cubic metre per hour to newton cubic metre per hour
There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?
what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .
how many types of preheaters are in cement industry & what r they can any body explain?
Can any body help to get Rsemulator 5000 free from internet if possible then give me any link or any help .
How you calibrate absolute pressure with the calibration range of 0 to 1000 0C Absolute. Please explain the procedure for calibration.
Which type of diagphram use in costic line,DM water line,natural gas line,oil line?
State bernoulli’s application.
Why even multiple power supplu r used in instrumentation system?
A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe
what is basic difference between motion balance and force balance in pneumatic instrument?
what is piezoelectric transducer?give an example in power plant n state its principle?
