How to prevent freezing of pressure gauges in northern refineries during winter
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How do northern refineries prevent pressure gauges from freezing in winter? Pressure gauges are prone to freezing when the weather gets cold; how do you ensure that they don’t get damaged as a result?
This post was last edited by yx5494 on 2018-1-15 09:24 to go and visit the refining and chemical plants in the north. I saw that the pipes were covered with black insulation material, which was quite thick and resembled sponge. The base of the pressure gauge can also be buried. I was just there for a visit. . . Your profile picture is so attractive, kisses~
The pressure gauge on site is not the one that is sent to the indoor control room
The freezing of pressure gauges is mainly caused by water remaining in the leads and buffer tubes; this can be addressed during installation: in addition to considering ease of maintenance, replacement, and monitoring, it is also necessary to think about ways to prevent freezing in winter. • 1. For sections of media that are at low temperatures, experience little pressure variation, and are prone to freezing, pressure gauges can be installed there without the need for overly long buffer tubes; installing them as close as possible to the pipelines and the equipment itself can help prevent freezing. • 2. If possible, the pressure gauge can be installed on the leeward side.
It seems some make thermal vests!
1. If the temperature of the medium in the main pipeline or equipment is high, the pressure gauge can be installed at the upper part of the pipeline or equipment; the pressure conduit and the rear part of the pressure gauge should be insulated as a whole, leaving only the gauge dial visible for reading. 2. If the medium is a freeze-prone substance such as water, heating and insulation can be applied. Determine light or heavy heat tracing based on the medium conditions. 3. The pressure guide tube should be as short as possible.
Black – that’s insulation cotton, right? . . Similar to the outer cover of an air conditioner’s outdoor unit duct. . I forgot what the scientific name is. . High-density polyethylene foam, I think
Simply adding insulation foam without heating elements does not yield very good results
For media that are not prone to freezing, the pressure gauge remains in place as long as the insulation and heating systems are intact; however, this approach does not work for media that are prone to freezing, in which case the pressure gauge must be removed directly； For example, in the case of water pumps, condensate pumps, and benzene medium pumps, it is sufficient to monitor the current, vibration, and any abnormal noises at the site ； For internal operations, it’s sufficient to monitor flow rate, liquid level, and pressure.
It’s not suitable to use an insulated box; it’s a field pressure gauge, not a pressure transmitter (transmitters and similar devices come equipped with heating wires)