• How to detect the quality of spiral steel pipe factory

    Spiral steel pipe should be tested before the factory mechanical properties and flattening test and flaring test, and meet the requirements of the standard requirements. ...

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    Date:2018-04-20      View:9      Tag:How to detect the quality of spiral steel pipe factory

  • Installation of spiral seam steel pipe

    1. repair the mouth In order to ensure the welding quality, the welding is carried out before the complete inspection and correction, so that the pipe end, the oblique angle, the blunt edge and the roundness are in accordance with the interface size. When the individual steel pipe needs to be processed in the field, the gas welding is used and the...

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    Date:2018-04-20      View:9      Tag:Installation of spiral seam steel pipe

  • Why does oil drilling choose thick-walled seamless steel tubes?

    Why does oil drilling choose thick-walled seamless steel tubes?...

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    Date:2018-04-20      View:8      Tag:Why does oil drilling choose thick-walled seamless steel tubes?

  • The main difference between cold drawn seamless steel pipe and finish rolling seamless steel pipe

    Process equipment distinction: cold drawn seamless steel pipe is usually 0.5 ~ 100T single-chain or double-chain cold drawn machine. Finished seamless steel tubes are usually carried out on a two-roll mill where the steel pipe is rolled in a ring-shaped bore formed by a variable cross-section round hole and a stationary tapered head. ...

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    Date:2018-04-20      View:6      Tag:The main difference between cold drawn seamless steel pipe and finish rolling seamless steel pipe

  • ASTM Standard

    For the ASTM standard, the mechanical properties, chemical composition and metallurgical properties of different steels are different. There is a list of ASTM standards for different steel grades....

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    Date:2018-04-20      View:8      Tag:ASTM Standard

  • Nonstandard steel pipe

    The non standard steel pipe is a kind of steel pipe which is compared with the national standard for the seamless steel pipe except the state standard. In the production of seamless steel pipe, the thickness of the wall thickness is classified according to the national conventional requirements and the thickness of the wall is classified...

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    Date:2018-04-20      View:8      Tag:Nonstandard steel pipe

  • Black ERW Steel Pipe Factory Situation

    Black erw steel pipe is hot-rolled coil through the molding machine, the use of high-frequency current skin effect and proximity effects, so that the edge of the tube heating and melting, in the role of squeeze roller pressure welding to achieve production. ...

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    Date:2018-04-19      View:7      Tag:Black ERW Steel Pipe Factory Situation

  • Double-sided submerged arc welding direct welded steel pipe welding area

    Introduction of welded pipe welding of submerged arc welding: 1, bubbles occur in the middle of the weld, the main reason is that hydrogen is still hidden in the weld metal in the form of bubbles, so eliminating the defects is the first step to remove the wire and weld corrosion, oil, moisture and humidity, followed by the need to dry the flux to ...

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    Date:2018-04-19      View:6      Tag:Double-sided submerged arc welding direct welded steel pipe welding area

  • Pre-welding Quality of Straight Seam Steel Pipe

    The preweld quality of straight steel pipe includes weld quality and weld quality. (1) when the joint (i.e. the forming joint) has no wrong side or the wrong side is less than the specified value, the general error is less than or equal to 8%, and the maximum is not more than 1.5mm. (2) in order to ensure the suitable penetration depth and weldin...

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    Date:2018-04-19      View:8      Tag:Pre-welding Quality of Straight Seam Steel Pipe

  • Fracture of Straight Seam Steel Pipe in Production

    Straight seam steel pipe fracture, hydraulic (pneumatic) parts in the design of the use of mechanical properties, brittle fracture is also related to the use of components temperature. ...

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    Date:2018-04-19      View:11      Tag:Fracture of Straight Seam Steel Pipe in Production

  • Advantages of High Frequency Straight Seam Welded Pipe

    (1) the forming process of high frequency longitudinal welded pipe has little springback and little residual stress....

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    Date:2018-04-19      View:10      Tag:Advantages of High Frequency Straight Seam Welded Pipe

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