notizia

  • Quality inspection method of spiral pipe

    Quality inspection method of spiral pipe

    The quality inspection method of spiral pipe (ssaw) is as follows:   1. Judging from the surface, that is, in visual inspection. Visual inspection of welded joints is a simple procedure with various inspection methods and is an important part of finished product inspection, mainly to find welding...
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  • Seamless tube eddy current flaw detection

    Seamless tube eddy current flaw detection

    Eddy current flaw detection is a flaw detection method that uses the principle of electromagnetic induction to detect surface defects of components and metal materials. The detection method is the detection coil and its classification and the structure of the detection coil.   The advantages...
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  • Corrosion in drilling pipe

    Corrosion in drilling pipe

    What is the main difference between corrosion fatigue fracture and stress corrosion fracture of drill pipe? I. Crack initiation and expansion: Stress corrosion cracks and corrosion fatigue cracks are all sent to the surface of the material. Under strong corrosive media and large stress conditions...
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  • Seamless steel pipe schedule

    Seamless steel pipe schedule

    The steel pipe wall thickness series comes from the British metrology unit, and the score is used to express the size. The wall thickness of the seamless pipe is made up of the Schedule series (40, 60, 80, 120) and is connected to the weight series (STD, XS, XXS). These values are converted to mi...
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  • Raw material and production process of steel

    Raw material and production process of steel

    In daily life, people always refer to steel and iron together as “steel”. It can be seen that steel and iron should be a kind of substance; in fact, from a scientific point of view, steel and iron have a little Different, their main components are all iron, but the amount of carbon co...
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  • Precautions when washing seamless tubes

    Precautions when washing seamless tubes

    When processing seamless tubes in seamless steel tube factories, pickling is used. Pickling is an indispensable part of most steel pipes, but after pickling seamless steel tubes, water washing is also required. Precautions when washing seamless tubes: 1. When the seamless tube is washed, it needs...
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