Hot water boiler pressure gauges are generally used for boiler pressure measurement. Its design and installation generally need to consider several aspects:
(1) Each hot water boiler shall be equipped with a pressure gauge directly connected to the steam space of the drum. Before the feed water regulating valve, a pressure gauge should be installed between the separable economizer outlet, the superheater outlet and the main steam valve.
(2) Hot water boiler or pressure vessel whose working medium is high-temperature steam. The pressure pipe should be equipped with a water storage elbow to allow the steam to condense in this section of the elbow. The components in the table are overheated and deformed, which affects the accuracy of the pressure gauge. When the steel pipe for water storage elbow is used, its inner diameter should not be less than 10mm. A three-way cock should be installed between the pressure gauge and the water storage elbow, so that the pipeline can be purged, replaced, and the pressure gauge calibrated.
(3) According to the allowable pressure of the hot water boiler or pressure vessel, draw a warning red line on the dial of the pressure gauge. However, the warning red line should not be drawn on the glass of the pressure gauge, so as to avoid the illusion of glass rotation and cause accidents.
(4) For pressure vessels with high temperature, strong corrosiveness or high viscosity medium, the isolation pipeline filled with liquid should be installed on the connecting pipe between the pressure gauge and the container, or a corrugated flat film pressure gauge should be used. .
(5) The location of the pressure gauge should be adequately illuminated to facilitate the operator’s observation and inspection. Protect the pressure gauge from radiant heat, low temperature, and vibration.
(6) In order to facilitate the replacement and calibration of the pressure gauge, a three-way cock should be installed between the pressure gauge and the pressure-bearing equipment. The cock should be installed on the vertical pipe section, and there should be an opening mark and a locking device.
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