In order to improve work efficiency, the new methods of ship repair and repair in Yingkou have generally adopted advanced ship repair techniques and methods in recent years, mainly including:

① Use high-pressure water or high-pressure water sandblasting with a pressure of up to 500 kgf/cm to clean the hull and remove rust, and the rust removal speed can reach 2000 m/h;

②Using the high-pressure airless spraying method with a pressure of 200 kgf/cm to paint the hull, and drying with hot air if the weather is humid, the spraying speed reaches 4000 m/h;

③Using the prefabrication method of segmentation and segmentation for ship hull plate replacement, the daily plate replacement volume of a single ship reaches 30-40 tons;

④The divers use tools such as hydraulic or pneumatic brushes to clean or repair the hull underwater to solve the difficulty of repairing large ships without a large dock, and it can be carried out at the same time as loading and unloading cargo to reduce the damage caused by docking. Cause loss of suspension;

⑤Use alkaline solution to remove grease on electromechanical equipment, acid solution to remove scale, and neutral solution to clean electrical appliances, the cleaning efficiency is greatly improved;

⑥ For large parts such as crankshafts, shaft systems and rudder stocks, the method of repairing them on the ship or in the dock without dismantling and transporting them to the workshop; ⑦ Implementing methods for precision parts such as automation devices, governors, and superchargers Specialized repair; ⑧The method of group replacement is adopted for small and medium-sized parts, and the replaced old parts are repaired according to the new standard before being used.

The overhaul is carried out once every 4-6 years, that is, one overhaul after 2 to 3 annual repairs. The repair scope is larger than the annual repair. It is preventive and is also carried out in the docks or platoons of the ship repair yard. Overhauls are generally combined with special inspections. The surveyor will dismantle, inspect, measure and test more than 40 items of the hull and the main equipment of the entire ship. According to the inspection results, repair the items that may affect the safe navigation until the next inspection and repair, so as to ensure the service life of the ship.

Voyage repair is abbreviated as voyage repair. Before the annual repair or overhaul, the shipyard will send personnel to the ship docked at the dock, anchorage or sailing to assist the crew in troubleshooting temporary faults and keep the ship in operation.

Accident repair Repairs to eliminate the damage caused by the accident after marine or machine damage accidents such as collision, grounding, fire, etc. The extent of damage to the ship and the scope of repair caused by the accident must be inspected and appraised by the ship inspection agency.

Modification repair is a modification and repair project carried out to improve the performance of the ship or change the purpose of the ship. For example, the hull is extended, ordinary ships are changed to special ships, and the power equipment is changed from steam engines to diesel engines. Changes involving the basic structure and main parameters of the ship must be designed in advance and carried out after approval by the ship inspection agency.