The issue of gauge range and the setting pressure of safety valves
Thread Content
Should the range of the pressure gauge on a pressure vessel be higher than the setting pressure of the safety valve?
This post was last edited by ylb913 on 2016-10-21 22:04. This is necessary! Selection of the pressure gauge’s measurement range: ⑴ When measuring a steady pressure, the normal operating pressure value should be between 2/3 and 1/3 of the upper limit of the gauge’s range. ——This is the most general requirement for selecting the range of a pressure gauge. ⑵When measuring pulsating pressure (such as the pressure at the outlet of pumps, compressors, fans, etc.), the normal operating pressure value should be between 1/2 and 1/3 of the upper limit of the instrument’s measurement range. ⑶When measuring high and medium pressures (greater than 4 Mpa), the maximum operating pressure should not exceed 3/5 of the upper limit of the instrument’s measurement range. ⑷After the upper and lower limits of the gauge are calculated based on the pressure to be measured, these values cannot be used directly as the gauge’s range. In China, pressure gauges manufactured come with standardized ranges: 1 KPa, 1.6 KPa, 2.5 KPa, 4.0 KPa, 6.0 KPa, as well as their multiples by 10 (where n is an integer). Therefore, when selecting a gauge range, it is necessary to use the values specified in relevant standards or specifications.
It’s necessary; this is one of the most common questions....