Issues with borosilicate glass sight glasses in pressure pipelines
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A flanged sight glass needs to be installed in the liquid ammonia pipeline, but many manufacturers of sight glasses do not possess the qualifications for pressure pipeline components. The sight glass for liquid ammonia unloading facilitates the observation of the unloading process, prevents the unloading pump from rubbing dry, and also ensures that the amount of material remaining in the tank truck is within the limits specified by the company’s measurement standards. Do any of you know where I can find such qualified vision mirrors?
Yes, many manufacturing companies do not have the qualifications to produce such pipe components. But their production capacity is also very high.
So it’s troublesome; after all, it’s an ammonia pipeline
The poster could consider installing the perspective mirror at a distance from the pump inlet; in front of it, a steel pipe with one end fitted with a flange and the other end equipped with a quick-connect fitting should be connected. During unloading, the quick-connect fitting can be directly connected to the steel pipe. I assume that when unloading at the poster’s company, there is gas-phase equilibrium between the storage tank and the tank truck, so the pressure at the pump inlet won’t be high – it will be much lower than the pressure at the pump outlet. This also makes it easier to determine whether all the material from the tank truck has been unloaded, allowing for timely shutdown of the pump. Of course, the actual setup will also need to take into account the factory’s process requirements
Do transparent windows belong to pressure pipeline components? I remember that filters don’t require a TS certificate
Buy ready-made glass flanged sight glasses; these come with pressure certification. You need to determine the pressure of your liquid ammonia and choose a flanged sight glass that is one size larger.
The Special Equipment Catalog does not specify this clearly
It’s actually quite far – over twenty meters; unloading is done using flexible hoses
The unloading of liquid ammonia must be carried out using a loading/unloading arm; when purchasing such an arm, it is possible to equip it with straight-through sight glasses. Additionally, unloading by pump is not recommended; instead, pressurization through gas pipes is generally used for unloading.