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Manufacturing Process of Seamless Steel Pipe
The seamless steel pipe can be divided into two types of steel pipes according to their different manufacturing process: Cold rolled seamless steel pipe and Hot rolled seamless steel pipe.
These two different kinds of seamless steel pipes have different manufacturing methods, thus they have different manufacturing process. Their manufacturing process can be compared below.
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1.Rolled round billets |
1.Rolled round billets |
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2.Examination |
2.Examination and inspection |
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3. Cut off the materials |
3. Cut off the materials |
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4.Heating |
4.Heating |
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5.Piercing |
5.Piercing |
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6.Elongating |
6.Pointing |
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7.Slight tension reduction |
7.Hot rolled hollow room |
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8.Straightening |
8.Pickling |
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9.Corp end cutting off |
9.Cold-drawing |
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10.Visual inspection |
10.Heat-treatment |
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11.NDT/Water pressure inspection |
11.Physical chemistry test |
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12.Hydrostatic test |
12.Straightening |
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13.Finished product room |
13.Corp end cutting off |
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14.Marketing and bunding |
14.Surface and size inspection |
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15.Eddy current inspection |
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16.Ultrasonic inspection |
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17.Finished products room |