Ultrasonic flowmeter

Hello all.
I have a question relating to installation and commissioning of PROSONIC FLOW 93 P.
My first question is:
Where is the best place on the pipe for installing the sensors? 12 clock position or in the z pattern?
And second one:
We are going to install ultrasonic sensors on a 24 inch pipe. Previousely, an orifice type flowmeter was installed on the pipe. We removed the sensors and transmitter of orifice one, but we have no plan for removing the orifice plate, we are going to install ultrasonic sensors before orifice plate.
My question is that:
Does existing of the orifice plate affects on the measurement we took by ultrasonic one?
Thanks
 
To answer your first question...The best place is generally decided depending on the pipeline and the liquid medium
For clean liquid two traverse installations are the best, with sensors mounted at 3'o clock or at 6'o clock position as this kind if installations provide better accuracy...
But if the medium has scaling properties or if the pipeline has a large thickness then better to go for single traverse installations irrespective of your pipe size, which is sensors mounted opposite to each other.
To answer your second question, if you maintain the required straight run and good installation practices as indicated by the manufacturer, it shouldn't be an issue at all. Generally maintaining a straight run of 10D upstream & 5D downstream is a good engineering practice and also be sure that in no way there should be air entrapped with the liquid in case of measurements with ultrasonic flowmeters.
 
To answer your first question...The best place is generally decided depending on the pipeline and the liquid medium
For clean liquid two traverse installations are the best, with sensors mounted at 3'o clock or at 6'o clock position as this kind if installations provide better accuracy...
But if the medium has scaling properties or if the pipeline has a large thickness then better to go for single traverse installations irrespective of your pipe size, which is sensors mounted opposite to each other.
To answer your second question, if you maintain the required straight run and good installation practices as indicated by the manufacturer, it shouldn't be an issue at all. Generally maintaining a straight run of 10D upstream & 5D downstream is a good engineering practice and also be sure that in no way there should be air entrapped with the liquid in case of measurements with ultrasonic flowmeters.
Lots thanks for your answer.
 
To answer your first question...The best place is generally decided depending on the pipeline and the liquid medium
For clean liquid two traverse installations are the best, with sensors mounted at 3'o clock or at 6'o clock position as this kind if installations provide better accuracy...
But if the medium has scaling properties or if the pipeline has a large thickness then better to go for single traverse installations irrespective of your pipe size, which is sensors mounted opposite to each other.
To answer your second question, if you maintain the required straight run and good installation practices as indicated by the manufacturer, it shouldn't be an issue at all. Generally maintaining a straight run of 10D upstream & 5D downstream is a good engineering practice and also be sure that in no way there should be air entrapped with the liquid in case of measurements with ultrasonic flowmeters.
Thank you for your answer, we installed it with 2 traverse, but 6 o clock was not suggested by manufacture. We installed it on 10 o clock and it works perfect
 
Thank you for your answer, we installed it with 2 traverse, but 6 o clock was not suggested by manufacture. We installed it on 10 o clock and it works perfect
I'm sorry...my typing mistake....It is 3 o clock and 9 o clock...!!!
12 o clock is avoided as the liquid might have air bubbles inside entrapped and air bubbles would flow through the upper surface of the pipe which would lead to erroneous flow readings.Also half pipe flow is another factor why 12 o clock is avoided. Similarly 6 o clock is avoided as the liquid might have sediments and dirts inside which would flow through the bottom part of the pipe due to density difference of the medium and it would also lead to erroneous readings.
 
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