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Seamless steel pipe network provides: stainless steel composite pipe lined with stainless steel composite steel pipe to implement the town construction industry standard CJ/T192-2004, is a thin-walled stainless steel pipe in the inner wall of the steel pipe, this double metal composite steel pipe greatly enhances the water pipe, The corrosion resistance in the process of hot water supply, gas transmission, natural gas transmission, and oil transportation has a smooth surface and low fluid resistance. It also retains the high mechanical strength of the steel pipe. It can be welded, grooved, threaded, and sealed. The galvanized steel pipe is easy to corrode, and the plastic pipes connected by hot melt are easy to leak and aging. It is an ideal product for the upgrade of gas pipelines, water transport and oil pipelines.