Problems in the establishment of the 105-J oil system

For very detailed techniques and steps, please refer to (the requirements are indicated in blue): 1.1 Oil flushing of the lubricating oil system; 2. The purpose of oil flushing is to remove impurities from the pipelines and the system. 2.1.1 Oil flushing of centrifugal, axial flow, and screw compressors 2.1.1.1 Temporary oil transfer lines are connected at the ends of the lubricating oil and control oil main pipes to bypass the unit and return the oil directly to the main pipe and then to the oil tank; temporary oil transfer lines are also connected to the upper and lower oil pipelines of the high-level oil tank. A 150-mesh temporary filter screen is installed before returning the oil to the tank on the temporary oil transport line; it serves to collect debris on one hand, and to check the efficiency of the oil transport process on the other. . 2.1.1.2 Stainless steel blind flanges shall be installed at the flanges where each branch lubricating oil pipeline is connected to the main lubricating oil and control oil pipelines, to prevent impurities and oil contaminants from entering the moving mechanisms and avoid secondary contamination. 2.1.1.3 Close the outlet valve of all pressure and differential pressure transmitters, and activate the local pressure gauges. 2.1.1.4 Steps for oil flushing 3: The oil flushing process is part of an external circulation system; it is absolutely not allowed to flow directly into the machine unit. Therefore, stainless steel blind flanges must be installed at the flanges where each branch lubrication pipeline connects to the main lubrication and control oil pipelines. 4 Step 1: Flush the lubricating oil main pipe.  Install stainless steel blind flanges at the flange in front of the control oil check valve, and at the flange where the oil pipeline from the high-level oil tank connects to the main oil supply pipe.  Open the inlet and outlet valves of the oil pump, the shut-off valves and bypass valves before and after the pressure control valve at the oil pump outlet, as well as the shut-off valves and bypass valves before and after the pressure control valve of the lubricating oil main pipe. All discharge valves are closed.  Start two oil pumps simultaneously to flush the main oil supply pipeline with a high flow rate. During this process, the oil cooler and the oil filter’s air release lines are flushed in sequence (if there are orifice plates, they should be removed for flushing and reinstated afterward); meanwhile, the oil cooler and the filter are switched so that they are completely filled with oil, and the air release lines are flushed alternately. This process takes about 3 to 5 days. The single-unit test run of the oil pump is carried out in this step. 5 Step 2: Flush the oil supply and return lines on the high-level oil tank.  Open the inlet and outlet valves of the oil pump, the shut-off valves before and after the pressure control valve of the lubricating oil main line, as well as the bypass valve.  Close the shut-off valves before and after the oil pump outlet pressure control valve, as well as the bypass valve.  Install stainless steel blind flanges at the flange in front of the control oil check valve and at the flange at the end of the lubricating oil main pipe.  Remove the stainless steel blind plate at the flange where the oil pipeline on the high-level fuel tank is connected to the main fuel supply pipe.  Start two oil pumps simultaneously to flush the upper and lower oil pipelines of the high-level oil tank; this process takes approximately 2 to 3 days. 6 Step 3: Flush the control oil main pipe  Open the inlet and outlet valves of the oil pump.  Close the stop valves and bypass valves before and after the oil pump outlet pressure control valve, as well as the stop valves and bypass valves before and after the lubricating oil main pipe pressure control valve.  Remove the stainless steel blind plate at the flange in front of the control oil check valve.  Start one of the oil pumps to flush the control oil main pipe; this process takes approximately 2 to 3 days. 7　To enhance the flushing effect, during flushing, the oil temperature should be maintained within the range of 40–75°C, with the temperature and time being adjusted alternately as specified. After 4 hours of continuous operation, the temporary filter screen should be checked. 7.1.1 Oil flushing of reciprocating compressors 7.1.1.1 Disconnect the flange connecting the oil supply main pipe to the compressor casing, connect a temporary pipe to the oil sump in the casing, and install a temporary filter with a 150-mesh rating. 7.1.1.2 Open the inlet and outlet valves of the auxiliary oil pump, close the lower drain valve and the upper vent valve of the oil filter, to establish the oil flow path. 7.1.1.3 Start the auxiliary oil pump to flush the outlet section of the oil pump and the main oil supply pipe; open the vent valve on the oil filter to release all air, and then close it ； Open the bypass valve to fill the other set of oil filters, open the vent valve on them to release all air and then close it, after which switch the oil filters. After 4 hours, switch to another oil pump to operate, in order to complete the individual test run of the oil pump. The open-circuit oil transportation process takes about 10 to 14 days. 7.2 Methods to be followed for oil flushing 7.2.1 Conduct flushing at high flow rates; two pumps can be started simultaneously as appropriate. To increase the flow rate, nitrogen can be introduced at the pump outlet to facilitate air-assisted oil transport. 7.2.2 Alternating hot and cold oil transportation. 7.2.3 Alternating oil transportation on and off. 7.2.4 After the oil flushing step is completed, clean the inside of the filter housing with flour, and then install the official filter element. 7.3 Oil circulation in the lubricating oil system 8 The purpose of oil circulation is to clean various lubricating oil pipelines, bearing housings, speed control systems, etc., so as to create conditions for the proper operation of the unit and ensure its long-term stable operation. 8.1.1 After the oil flushing is successful, remove the temporary oil transfer lines and the temporary stainless steel blind flanges at each connection point; install 150-mesh filters at the flanges where the lubrication pipelines branch off and connect to the unit. 8.1.2 Start one of the lubricating oil pumps to circulate the oil in the lubricating oil system. This process takes about 3 to 5 days. 8.1.3 After the oil system passes the trial operation, the following tasks should be carried out:  Drain all the lubricating oil from the tank and pipelines.  Clean the fuel tank and filter cylinder with flour.  Replace the filter element.  Add qualified lubricant to the specified level again according to the lubricant maintenance schedule. 8.2 Quality inspection of oil transportation 9 At the end of each stage of oil transportation, the temporary filter screen is replaced, followed by 2 hours of oil flow at high volume. After inspectors from the owner, the EPC contractor, and the supervision party arrive, the pump is stopped and the filter screen is removed for inspection. If there are no hard particles on the filter screen, and the number of visible non-hard particles is less than 3 per square centimeter, then the oil transporter meets the requirements; otherwise, the process continues until compliance is achieved.