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　　In order to improve the corrosion resistance of steel pipes, galvanizing is applied to common steel pipes. Galvanized steel pipes are divided into hot-dip galvanizing and galvanizing. The hot-dip galvanizing layer is thick, the galvanizing cost is low, and the surface is not very smooth.

　　BS1387 Hot Dip Galvanized Steel Pipe are widely used in construction, machinery, coal mine, chemical industry, railway vehicles, automobile industry, highway, bridge, container, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery and other manufacturing industries.

　　Welded steel pipe with hot dip or galvanized layer on the surface of galvanized steel pipe. Galvanizing can increase the corrosion resistance of steel pipe and prolong its service life. Galvanized steel pipes are widely used in petroleum industry, especially in offshore oil fields, oil wells, pipelines, oil heaters, condensation coolers, coal distillation oil wash exchangers, trestle pipe piles and support pipes for mine tunnels.

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