The petrochemical industry involves important links such as refining, chemical production, and petroleum storage and transportation. The refining process involves various crude oil processing units, equipment, and pipeline systems, such as distillation towers, heat exchangers, reactors, etc., to ensure the fluidity of crude oil, the transportation of products, and the smooth progress of the process. Its high strength and high temperature resistance enable it to withstand high pressure and high temperature conditions during the refining process. In chemical plants, the production and processing of various chemicals require the use of diverse piping systems. Metal pipe flanges are used to connect reactors, storage tanks, pipelines, and manufacturing equipment, ensuring the safe transportation and handling of chemicals. They have good corrosion resistance and can withstand the erosion of chemical agents, ensuring the reliability and stability of the system. In the process of oil storage and transportation, the transportation of oil and natural gas involves long-distance pipelines and offshore pipelines, forming a complete transportation network. Its reliable sealing performance ensures minimal leakage and loss of oil and natural gas, and ensures safe transportation.