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444 stainless steel tube

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  • Oil casing is divided into surface casing, technical casing and oil casing according to their functions. Classification and application of oil casingSurface casing 1, used to seal the upper unstable soft, easy to collapse, easy to leak formation and water layer; 2. Install wellhead device to control


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  • Effects of arsenic on properties of steelElement 22: As (arsenic) Arsenic in ore can only be removed in the sintering process, and can also be removed by the method of chlorination roasting. In the smelting process of blast furnace, all arsenic is reduced into pig iron. When the arsenic content in s


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  • Basic knowledge of hydrostatic test of steel pipeHydrostatic test is an indispensable part in the manufacturing process of steel pipe. Its function is to test the anti-leakage performance of steel pipe under standard test pressure and pressure stabilizing time. It is an important means to check the


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  • Analysis of current situation and situation of the steel pipe industry (2019)Industry status quoAccording to relevant data from the national bureau of statistics, China's steel pipe production in 2018 was 73.2011 million tons, of which the welded pipe production was 48.3724 million tons and the seam


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  • Examples, characteristics and cause analysis of defects and defects of steel pipes (I)Steel pipe surface indentationOn the surface of indentationCharacteristics: steel tube surface is spiral concave. Causes: 1) improper adjustment of the roller Angle of the straightener, excessive pressure. 2) serio


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