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TORICH GOST8731 Seamless Hot Rolled Carbon Steel Tubes

Standard: ASTM, DIN, GB Standard2: ASTM A513-2007, DIN 2391, DIN EN 10305, GB/T 3639-2000 Grade Group: 10#-45#, ST35-ST52 Grade: 10#, 20#, 45#, St37, St52, St35.8, St37-2, St35.4, St52.4, ST35, ST37.4 Thickness: 0.5 - 12 mm Section Shape: Round Outer Diameter(Round): 12 - 128 mm Place of Origin: Zhejiang, China (Mainland) Application: Mechanical purpose Technique: Cold Drawn Certification: ISO 9001 TS16949 ISO 14001 Surface Treatment: Black Phosphate Finish Special Pipe: Hydraulic Seamless Tube Alloy Or Not: Non-alloy Secondary Or Not: Non-secondary Length: 1-12m Keywords: hot rolled seamless pipe
Product Details:

Standard: ASTM, DIN, GB Standard2:   ASTM A513-2007, DIN 2391, DIN EN 10305, GB/T 3639-2000 Grade Group: 10#-45#,   ST35-ST52 Grade: 10#, 20#, 45#, St37, St52, St35.8, St37-2, St35.4, St52.4,   ST35, ST37.4 Thickness: 0.5 - 12 mm Section Shape: Round Outer   Diameter(Round): 12 - 128 mm Place of Origin: Zhejiang, China (Mainland)   Application: Mechanical purpose Technique: Cold Drawn Certification: ISO 9001   TS16949 ISO 14001 Surface Treatment: Black Phosphate Finish Special Pipe:   Hydraulic Seamless Tube Alloy Or Not: Non-alloy Secondary Or Not:   Non-secondary Length: 1-12m Keywords: hot rolled seamless pipe

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What are the reasons for uneven thickness of carbon steel seamless steel tube wall


In the process of production of carbon steel seamless steel tube, can appear sometimes uneven thickness, produce substandard products and severe losses, according to the anatomical analysis of the automatic pipe mill rolling steel tube, think perforation capillary after plug mill rolling, longitudinal and steel tube wall thickness uneven remain largely in the form of the perforation thickness uneven distribution of MAO, namely after rolling spiral uneven wall thickness of steel tube still have, and transverse uneven wall thickness increased significantly.The reasons for the uneven wall thickness of the automatic tube rolling mill are as follows: (1) the form and severity of the uneven wall thickness of the perforated capillary tube directly affect the form and severity of the uneven wall thickness of the steel tube after rolling.(2) in the automatic rolling mill on the pipe, because the rod bending, so that the top position deviation from the center of the hole and lead to uneven wall thickness, the tube and tube head on the cross section of the maximum wall thickness and minimum wall thickness position is almost fixed;However, the uneven degree of wall thickness from the end of the pipe to the end of the pipe increases gradually. Therefore, reducing the residual bending degree of the ejector rod and the axial force of the ejector rod during pipe rolling can significantly reduce the uneven degree of wall thickness.(3) the greater the wall reduction, the more serious the uneven wall thickness of waste pipe, the less the wall reduction, the automatic tube rolling machine has the effect of reducing the uneven wall thickness of perforated pipe.(4) hole adjustment is not correct, when the roll seam uneven, will make the wall thickness of the pipe uneven aggravation.Through the above operation, the thickness uniformity of carbon steel seamless steel tube can be completely changed.




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