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  • Advantages and disadvantages of LSAW pipeline

    Advantages of LSAW pipes It can destroy the casting structure of steel ingots, refine the grain of steel, eliminate the defects of structure, make the steel structure compact and improve the mechanical properties. This improvement is mainly reflected in the rolling direction, so that the steel pipe is no longer isotropic to some extent; the dumpin...

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    Date:2018-05-24      View:3      Tag:Advantages and disadvantages of LSAW pipeline

  • How to ensure the quality of ERW carbon steel pipe

    ERW carbon steel tube has this processing technology, which has the advantages of post welding heat treatment, eliminating residual stress in weld and heat affected zone, refining grain, small heat affected zone and fast heating speed. It can greatly improve welding speed and weld quality. It can be used without pickling, shot peening and trimming ...

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    Date:2018-05-24      View:3      Tag:How to ensure the quality of ERW carbon steel pipe

  • Function and repair of P110 casing

    P110 casing plays an important role in oil well operation. They can protect shallow and shallow oil wells, and also support oil and gas transportation and drilling. Support the weight of wellhead and other layers to prevent collapse. In order to ensure the smooth completion of drilling and the completion of well operation, ensure that the pipeline ...

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    Date:2018-05-24      View:3      Tag:Function and repair of P110 casing

  • Field requirements for casing operation

    (3) For long oil and casing string, it is recommended to use sliding type elevator. Chuck and slip shall be clean, undamaged, and properly fitted. For heavy oil, casing string, extra long slips should be used and the chuck must be level. (4) If the hoisting hook is used, check whether the bearing surface is unevenly worn or not. This wear and tear...

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    Date:2018-05-24      View:3      Tag:Field requirements for casing operation

  • Process of casing pipe in plant

    Casing process in a factory The alternative quenching method provided by this study can not only reduce the internal stress produced in the quenching process, but also guarantee the occurrence of martensitic transformation inside and outside the casing, which is beneficial to restrain the occurrence of quenching or to expand the crack....

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    Date:2018-05-24      View:3      Tag:Process of casing pipe in plant

  • Microstructure of magnesium aluminum in casing

    Mg-Al spinel in the liquid steel of casing pipe begins to change into the liquid calcium aluminate; the magnesia-alumina spinel is more easily modified into the liquid inclusion than the alumina; the inclusions in the molten steel refining process are affected by the slag reaction and the influence of calcium treatment on the evolution of inclusion...

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    Date:2018-05-24      View:3      Tag:Microstructure of magnesium aluminum in casing

  • Stress and deformation of ERW tube

    he stress and deformation of the ERW pipe will produce stress and deformation on the surface of the ERW pipe as long as it is welded in the production process of the ERW pipe, but the degree is different. The welding stress and deformation caused by the welding process of ERW welded pipe often reduce the quality of welded products and even cause cr...

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    Date:2018-05-23      View:9      Tag:Stress and deformation of ERW tube

  • Dimensional tolerance of erw steel pipe

    Dimensional tolerance of erw steel pipe...

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    Date:2018-05-23      View:6      Tag:Dimensional tolerance of erw steel pipe

  • Effect of roller adjustment on the quality of ERW steel pipe

    The effect of roller adjustment on the quality of ERW has a process called roller adjustment when producing ERW pipes. During the production process, the roller is damaged or worn seriously. It is necessary to replace the unit on the part of the roller, or to produce a certain number of rollers continuously to meet the needs of the replacement of t...

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    Date:2018-05-23      View:9      Tag:Effect of roller adjustment on the quality of ERW steel pipe

  • Problems to be solved in the construction of large diameter longitudinal welded pipe mill in China

    1, choose the right process From the comparison of several large longitudinal welded pipe technology and the development analysis of large longitudinal welded pipe technology in the world, UOE is the main DSAW tube unit in the world to produce high strength pipeline steel pipe. Its production capacity is large and the quality of the product is goo...

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    Date:2018-05-23      View:7      Tag:Problems to be solved in the construction of large diameter longitudinal welded pipe mill in China

  • The straightening method of DSAW tube

    he straightening method of DSAW pipe: One, the DSAW tube is bent in the same direction Reason: Welding normalization is insufficient, the pipe has thermal stress on the welding side, and bent in one direction after cooling. Solutions: 1, adjust the middle roller, properly increase the deflection curve; 2, two straightening; 3, the whole temperin...

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    Date:2018-05-23      View:7      Tag:The straightening method of DSAW tube

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