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    Galvanized Steel Pipe Galvanized steel pipe is a steel tube that is coated with zinc, resulting in high corrosion-resistant and durable. It is also known as galvanized iron pipe. Our galvanized steel pipes are mainly used as fences and handrails for outdoor construction, or as interior plumbing for liquid and gas transport. Size seamless pipe 1/2"~24", DN15~DN600 OD21.3MM~609.6MM Welded pipe 1/2"~48", DN15~DN1200 OD21.3MM~1219.2MM Industrial Processes hot rolled, hot expanded, cold drawn, and hot galvanized.