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Hot dip galvanized seamless steel pipes manufacturing processes
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1.The seamless tube undergoes acid washing so as to remove the iron oxides
2.The product is washed in the aqueous solutions of ammonium chloride, or zinc chloride, or the mixed aqueous solution of ammonium chloride and zinc chloride
3.steel pipe is sent to the hot dipping tank to be galvanized
Hot rolled seamless tube production process
Round tube blank → heating → piercing → three roller skew rolling,continuous rolling, or extruding → semi-finished tube → sizing or size reduction → cooling → straightening → water pressure test or flaw detection → marking → warehousing
galvanized hot rolled seamless tube for construction
