Shipbuilding industry: The key to corrosion resistance and anti-vibration connections in marine environments.

In the shipbuilding industry, especially for large commercial ships, high-tech vessels (such as LNG carriers and chemical tankers), and offshore engineering equipment, their piping systems are exposed to corrosive marine atmospheres with salt spray and high humidity for extended periods, and bear complex mechanical loads such as hull deformation and engine vibration. The reliability of flange connections directly impacts the ship's power system, cargo handling system, ballast system, and even the overall safety of the vessel. For instance, the cryogenic pipeline flanges in the liquid cargo tanks of LNG carriers must maintain toughness and achieve absolute sealing at extremely low temperatures of -163°C; for the cargo piping system flanges of chemical tankers, corresponding stainless steel or special alloy materials need to be selected based on the corrosion characteristics of different cargoes. The selection and manufacturing of flanges in the shipbuilding industry must comply with the specifications of various classification societies (such as DNV, ABS, CCS, etc.), focusing on the seawater corrosion resistance and fatigue resistance of materials. The connection design needs to consider anti-loosening and ease of installation and maintenance in confined spaces, which is an important guarantee for reliable operation of ships in harsh marine environments.