Pressure Gauge for Flowline

[e43u8]

Hi

A flowline with operating pressure of around 25 barg, has a much more design pressurte around 170 barg. What would be the proper pressure gauge and its range for this conditions?

 

[LittleInch]

Normally you want a pressure guage at its maximum pressure to be around 70-80% of its range.

With such a large discrepancy, you need to figure out what the maximum pressure the line will see regardless of its design pressure.

Get it wrong and you break the guage if it goes off scale ( if you get a single large pressure once) or means you're operating at 10-15% of range ( if you go for 200 bar range).

Over pressure protectors can be fitted but are not very reliable and can prevent you seeing a large pressure as the guage will freeze at what ever you set the over pressure protector to. They sometimes don't all the pressure to fall and get stuck closed.

Or get a digital readout from a transmitter.



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[BeckActuators]

Usually It is important to select a pressure range that is approximately twice the normal operating pressure of the media. The maximum operating pressure should not exceed 75% of the full scale range. If a gauge is not selected considering these criteria, it may result in fatigue of the Bourdon tube

Now since the operating pressure for your system is 25bar, it is better to get a pressure gauge that has range of measuring pressure upto 50-60bar. Since as such as your gauge stays in the safe limit as mild as there are chances for the fatigue in bourdon tube.

But there is limitation to this safety limit because of such huge diff between max pressure and the operating pressure. To avoid this limitation find out at which pressure does your system goes to max while operating out of the bound and select range according to that one.

Electric Actuator You Can Depend On

https://www.haroldbeck.com/

 

[e43u8]

@BeckActuators,

Please clarify about your following statement:

"But there is limitation to this safety limit because of such huge diff between max pressure and the operating pressure. To avoid this limitation find out at which pressure does your system goes to max while operating out of the bound and select range according to that one."

 

[danw2]

Proof pressures vary by manufacturer and product, typically 110% of span up to 150% of span.

Burst pressures vary from widely, again, manufacturer, product and range specific. For definitions, examples, and tables, see the manufacturer specs for Ashcroft and Reotemp at these URLs:

Ashcroft [link

http://ashcroft.com/productinformation_pdf/upload/pip_ash_42d_bourdon_rupture_proofover_pressure.pdf

]Link[/url]

Reotemp Link