Manufacturing process of marine cranes

The manufacturing process of marine cranes is a systematic one that must strictly adhere to ship specifications and quality standards to ensure the safe and reliable operation of the equipment in harsh marine environments. This process typically encompasses key stages such as design, material preparation, machining and assembly, inspection and testing, painting, and shipping.

1.Design and Planning Phase: Based on customer requirements (e.g., lifting capacity, working environment), a needs analysis is conducted. Engineers create preliminary design drawings and determine technical parameters. After design completion, it must be confirmed by the customer and reviewed by a third-party organization (e.g., a classification society) to form the final technical documents.

2.Material Procurement and Acceptance: A material list is compiled based on the design drawings. Marine steel plates conforming to specifications (e.g., Q345B or higher) are selected, and supplier qualifications are verified. Materials undergo quality inspection upon arrival, and only qualified materials are put into storage.

3.Processing and Welding: After cutting, the steel plates enter the welding process. Welding operations are supervised by classification society certified personnel, using methods such as ultrasonic testing to ensure weld quality. After welding, the surface is ground smooth.

4.Assembly and Commissioning: Processed components are assembled according to the process flow. Key steps include structural welding, mechanical component installation, and electrical system integration. After assembly, no-load, load, and sea state simulation tests are conducted, witnessed throughout by classification society personnel.

5.Quality Inspection and Coating: Inspection is conducted throughout the manufacturing process, and finished products must pass inspections for appearance, function, and safety performance. Surface treatment includes sandblasting to remove rust and applying primer and topcoat to enhance corrosion resistance.

6.Shipping and Installation: Shipped using tested marine cranes, small equipment is transported as a whole, while large equipment is packaged in parts. Installation is typically carried out by a professional team on the ship's deck using flange connections or welding.