1. When CNG vehicle maintenance or vehicle maintenance needs to be welded, the cylinder pressure should not exceed 5 MPa. First, check the gas system's leak tightness. If any leaks should be eliminated, confirm that the system is well sealed.
2. Close all cylinder valves, front and rear high-pressure shut-off valves, empty the air pressure in the pipeline first, and check that no leakage can occur after the operation. There is a safety guardian on the job site and various safety protection measures are carried out according to the safe operation methods of flammable and explosive materials.
3, maintenance of vehicles should check the gas cylinders, high and low pressure pipelines and gas devices have no friction, loose phenomenon, there is a problem in time to deal with.
4. It is strictly forbidden to use the top frame of the cylinder or cylinder carrier to do the dragging device or other stress and load-bearing components; it is not allowed to collide, squeeze the gas cylinder or high pressure pipeline.
5. It is forbidden to perform electric welding and arc ignition on cylinders and pipelines, and it is forbidden to damage cylinders due to welding or collision; if gas cylinders have been filled with natural gas, the distance to open flame shall not be less than 10 meters.
6. When servicing a CNG vehicle, check whether the fuel system is normal and whether there is any oil leakage or looseness. If the gasoline hose is deteriorated or deteriorated, it should be promptly replaced.
7. CNG vehicles should dispose of natural gas in pipelines, remove gas cylinders, and hand them over to repair units during major repairs and frame repairs; pipelines and gas installations should be protected during construction.
8, when the maintenance of the engine must disconnect the natural gas pipeline. The air supply should be turned off, and the connectors should be blocked with a clean, oil-free cloth to prevent foreign matter from entering the piping and damaging the pressurizer.
9, check the maintenance of natural gas equipment, electronic cigarette lighter, valve clearance, spark plug clearance, etc.; filter filter, filter, prevent blockage of natural gas pipeline, affect the sealing of an intake valve core, so that a pressure increase mixed Strong air, affect the use of safety. The diaphragm is maintained and cleaned once every two weeks or so.
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