Regarding the selection of pressure gauges
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There is a condensate pipeline at my station, with an operating pressure of around 0.2 MPa under normal conditions. However, once reverse transfer is required due to clogging in the upstream section, the pipeline pressure can reach around 2.5 MPa. Thus a question arises: how should one choose a pressure gauge? Choosing a too large size is not conducive to observing the operating pressure. Will returning it if the size chosen is too small cause a leakage issue with the pressure gauge? It is also important to check whether the pressure rating of the gauge matches its range; for example, can a gauge with a range of 0.6 MPa withstand a pressure of 3 MPa without leaking?
If the range is set too low, it’s not possible to see clearly inside, but the pointer is definitely damaged
It’s okay if it gets damaged; what’s worrying is a medium leak.
The last edit to this post was made by 1111111 on 2018-1-25 at 17:04. What kind of pressure gauge should be used? It’s such a dumb choice; that face looks awful. It’s not even as good-looking as a monkey, which is beautiful, {:2_32:}. Buy a quality pressure gauge instead – I guarantee it can handle overloads of 2.5 MPa and 5.5 MPa without the gauge getting damaged. Full-view, all-weather, rain-resistant, with push-button operation without needing to open the cover. .
This post was last edited by 1111111 on 2018-1-25 at 17:08. It’s the most beautiful step-up transformer in the world! From appearance to soul, beauty knows no bounds. . . . . . Are there any objections? . . {:2_42:} . Choose SC329. . . If you don’t use 4–20mA remote signaling, I’ll teach you how to keep the output at a constant 4mA throughout the life of the meter. .
You must choose a gauge rated for the maximum pressure; choosing one with a lower rating might prevent leakage, but it will definitely cause damage. Additionally, the pressure that the gauge’s system can handle has nothing to do with its range
Bro, this voltage regulator is really amazing – it can handle loads of up to 50 MPa. Not only does it not get damaged under such conditions, but it can also display that 50 MPa value. . {:2_41:} . Monkeys sit in the trees, mocking those who are inexperienced and naive, as well as Chang’e. . .
“\"The system’s capacity to withstand pressure has nothing to do with the range of the gauge\"? ! —— Oh my, is that the teacher who taught you? It’s completely wrong as well.
It is difficult to choose a pressure gauge that can cover two ranges with such a large difference between them; as Brother Pig said, it’s better to opt for a transmitter with an on-site display, as this allows coverage of both ranges. It can also be transmitted over long distances if necessary.
I have encountered this type of operating condition before. Gauge pressure meters are intended for use by field operators. Two types of gauge pressure meters should be selected: one with a range suitable for normal operating pressures of 0.2 MPa, such as a range of 0–0.6 MPa; the other gauge is designed to measure the maximum pressures present in the field. In the event of abnormal operating conditions, process operators will still be aware of the actual pressure inside the pipeline. Of course, after an anomaly, the pressure gauge with a small range needs to be replaced. But after all, abnormal operating conditions should be rare; safety comes first. Although pressure relaxers are good, it should be taken into account that personnel on site will not be able to see the actual data in the event of a power outage.
There’s no other way; otherwise, use one pressure tap with two valves to connect to the pressure gauge. When under pressure, just have the site close the root valve of the low-pressure gauge.