Hot-Rolled seamless steel pipe

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Hot-Rolled seamless steel pipe
Posting date : Jul 02, 2009
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HS-CODE
72-
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Detailed Description
Hot-Rolled seamless steel pipe use the round billet, after cutting,become the billet of one meter .By conveyor belt to the inside of the heating furnace with 1200 centigrade degree. Then piercering and three-roll cross rolling, rolling or extrusion. After that the Sizing machine use the conical drill bit with the high-speed rotating perforated through into the billet to form a steel pipe

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