Oil cleaning standards for pipelines at large-scale unit fuel stations
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Currently, the equipment in our factory is in the single-unit testing phase, with the oil circuits of the large units being flushed. I would like to ask what are the acceptable standards for using flushing oil in oil circuits; are there any relevant national standards or API standards? Thank you!
We generally follow these requirements: at the inlet of each lubrication point, there should be filters with a mesh size of 180 to 200 mesh; after 4 hours of oil flow, no more than two soft particles per square centimeter are allowed, no hard particles whatsoever are permitted, and a small amount of fibers is acceptable. 2. Install 180-mesh metal filters at each inlet, and carry out oil circulation according to the normal procedure. After 24 hours of oil circulation, the pressure difference across the oil filter should not increase by more than 0.01–0.015 MPa. Requirements are generally also specified in the process specifications and equipment installation guidelines
Before transporting oil, it is necessary to ensure that the lubricant pipelines and oil tanks are clean. Since lubricant pipes are usually prepared by the manufacturer, it is inevitable that they come into contact with impurities during transportation. Additionally, some pipes are installed on-site. Therefore, for pipes, acid cleaning and passivation should be carried out to ensure their cleanliness and to provide the necessary corrosion protection. For areas such as the fuel tank and the bearing housings of the machine itself, they should be cleaned and then wiped clean with dough. During oil circulation, the oil temperature is raised to the level required for normal operation of the unit (between 37 and 45 degrees). After 48 hours, a quality test can be conducted; if the oil quality is satisfactory, oil circulation can be stopped, the filter in the oil station can be removed, and a new filter element can be installed.
Thank you to both of you up there for the detailed explanations.
I’ve learned that even after the oil is circulated, it remains dirty after half a month~ It’s impossible to figure out where those impurities come from~
What kind of impurities? Only by figuring out what the impurity is can we trace its origin
Standards for reference during commissioning procedures:)