The issue of the buffer bend in the pressure tapping tube?
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I understand that the pressure tapping pipes of the local pressure gauges on the steam pipes at the site all have buffer bends, but the pressure tapping pipes of the remote pressure transmitters on all the pressure pipes do not have such buffer bends, and neither do pressure switches; I don’t understand why there are no buffer bends for the remote ones Another question: is a buffer bend required for high-pressure feed water?
The name is incorrect. It’s called a condensation ring. Function: At high temperatures, condensate forms; some of this condensate remains in the lowest points within the enclosure, thereby protecting the instruments from damage caused by the high-temperature medium.
Thanks for the correction! Is it necessary to add a transmitter?
It depends. To give an example: when measuring steam pressure, if you want the transmitter to be installed in a short length similar to that of a PG gauge without the need for pressure guiding tubes, then a condensation coil is required. If it is a pressure-induced method, add a condensation vessel.
If measuring normal-temperature water, then it’s definitely not necessary
Pressure transmitters are gathered at one point using pressure conduits, at a distance of several meters apart; there are no condensation devices in place.
When focusing on the safe operation of instruments and their service life, whether it is for measuring gases, liquids, high-temperature fluids or low-temperature fluids, a buffer bend should be installed in such cases. Especially when the sampling point is located close to the pump or valve outlet, it is often necessary to lengthen the pressure transfer tube and add a bend to it as well. The buffer bend serves two purposes: to smooth out pressure shocks and to prevent heat transfer
Thank you! The pressure transmitters on those steam pipes don’t have buffer bends (the local pressure gauge pipes do have them); should buffer bends be installed on those for remote monitoring as well? What is the impact of not installing it on the pressure transmitter?
The pressure measuring tubes of the pressure transmitters are several meters away and located below the steam pipes; is it necessary to install buffer bends?
That is called a condensation bend; when the temperature of the medium being measured is above 70 degrees, a condensation bend is required for the pressure gauge. It’s not a buffering effect.