Industrial metal pipe flanges play a crucial role in connecting cooling systems, drainage systems, and sewage treatment systems in the field of shipbuilding, ensuring the safe operation and comfort of ships. The high strength, corrosion resistance, and reliable sealing performance of metal pipe flanges make them an indispensable component in shipbuilding, meeting the stringent requirements of the shipbuilding industry for pipeline connections. In the fuel system of a ship, the fuel system includes fuel supply pipelines, return pipelines, and fuel filtration systems, which need to have high pressure and corrosion resistance characteristics. The metal pipe flange ensures the safe transportation and supply of fuel through its sturdy structure and high-quality material selection. Metal pipe flanges are also used in the cooling system of ships. The cooling system includes seawater cooling system and circulating water cooling system, which are used to reduce the temperature of ship engines and equipment. In addition, in the drainage and sewage treatment systems of ships, the drainage system is used to remove sewage and wastewater from the interior of the ship, while the sewage treatment system is used to treat sewage, which meets environmental requirements.