What are the main aspects of maintenance for gas pipelines?

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What are the main maintenance tasks for gas pipelines? (1) Apply anti-corrosion paint to the metal surfaces of the gas pipelines and associated equipment every five years. (2) Conduct a pipeline wall thickness inspection once a year. (3) Conduct an inspection of the pressure drop in the gas supply line once a year, as well as an inspection of the sediment thickness in the flow channels, pipes, and main lines of the gas supply system. (4) Check for leaks once before the onset of winter and after thawing each year, keep records, and address any issues within a specified time frame; inspect the valve packing quarterly. (5) The grounding resistance should be tested once a year, the lightning protection, rain protection, and wind protection systems should be inspected once a year, and the water collection tanks and drainage channels should be cleared once a year. (6) Lubrication checks and replenishments are generally carried out in the first and third quarters of each year, with lubricant applied to all valves. (7) Clean the drainers twice a year. (8) Conduct anti-freezing assurance inspections before sending steam each year, and complete the work before winter arrives. (9) Conduct a test on the opening and closing of the vent pipe valve once a year at the onset of winter, drain the water accumulated in the vent pipe, and check the condition of the compensator. (10) The pipeline network and operation platform are cleaned and organized once every spring.