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  • Thick-walled Uneven of Seamless Steel Pipe

    Thick-walled Uneven of Seamless Steel Pipe

    Thick-walled uneven of seamless steel pipe 1, During the perforation of seamless steel tubes extending coefficient is too large, roll speed is too high, rolling stable. 2, Throwing punch steel capillary instability could easily lead to the tail of uneven thickness. 3, Seamless steel tube tip cut ...
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  • Steel Pipe Heat Nubmer

    Steel Pipe Heat Nubmer

    Heat number: it is a steel smelting furnace number of times with unique, traceability. Different mills have different numbering, but each furnace steel must be a number. Heat number is divided into furnace number and batch number, the furnace “means a furnace where the steel manufacturing p...
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  • How to identify the quality of large diameter spiral welded pipe?

    How to identify the quality of large diameter spiral welded pipe?

    Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is a low-carbon structural steel or low-alloy structural steel strip rolled into a tube blank at a certain helical angle (called a forming angle), also known as a spiral tube or a spiral body. The outer diameter of the spiral tub...
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  • Common surface defects of seamless tubes

    Common surface defects of seamless tubes

    Common outer surface defects of seamless tubes (smls): 1. Folding defect Irregular distribution: If mold slag remains locally on the surface of the continuous casting slab, deep folding defects will appear on the outer surface of the rolled tube, and they will be distributed longitudinally, and &...
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  • The main cooling bed types of spiral welded steel pipe production line

    The main cooling bed types of spiral welded steel pipe production line

    What are the main types of cooling beds in the spiral welded steel pipe production line? The following is introduced by HSCO carbon steel pipe manufacturers. 1. Single chain cooling bed The single-chain cooling bed mostly adopts a climbing structure. The cooling bed is composed of a forward trans...
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  • Points of heating welding tube

    Points of heating welding tube

    Pipe processing step requires strict, in which the hot rolling process is very important process, in which to introduce the following precautions during the heating pipe. 1, the pipe must be able to feed one of those metal properties were a good understanding Before rolling, when the deforming fo...
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  • Defect of Hot-rolled Seamless Steel Pipe

    Defect of Hot-rolled Seamless Steel Pipe

    Defect of Hot-rolled Seamless Steel Pipe Separation Located on the inner surface of the steel pipe was vertical distribution, was raised helical, massive metal separation or break-like dissection. Straight inner flap Located on the inner surface of the steel pipe was vertical distribution, showin...
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  • The difference between structural tubes and fluid tubes

    The difference between structural tubes and fluid tubes

    Structural tube: Structural tube is a general structural steel tube, referred to as structural tube. It is suitable for seamless steel tubes for general structures and mechanical structures. The most common material is carbon steel, which can be divided into two types: ordinary carbon structural ...
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  • Cold drawn seamless steel pipe finish condition

    Cold drawn seamless steel pipe finish condition

    Cold drawn seamless steel pipe finish condition is as follows: Cold finished (hard) BK(+C) Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation Cold finished (Soft) BKW(+LC) The final heat treatment is followed by cold dr...
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  • Packaging requirements for seamless tubes

    Packaging requirements for seamless tubes

    The packaging requirements of seamless tubes (smls) are basically divided into two categories: one is ordinary bundling, and the other is loading in similar containers with turnover boxes. 1. Bundled packaging (1) Seamless tubes should be prevented from being damaged during bundling and transport...
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  • Packaging method of anti-corrosion spiral steel pipe

    Packaging method of anti-corrosion spiral steel pipe

    Packaging method of anti-corrosion spiral pipe: 1. Our country stipulates that the anti-corrosion spiral steel pipe adopts the method of bulk weighing. The size of the baler should be in the middle of 159MM to 500MM as far as possible. The raw material of the baler uses steel belts, each of which...
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  • Steel Tube Weld Cold Crack

    Steel Tube Weld Cold Crack

    Cold crack reasons: the person to be subjected to welding when a large tensile force can be easily torn in the process of cooling the welding material hardenability; welding cooling rate was too late to escape the residual hydrogen in the weld, a hydrogen atom bonded to a hydrogen molecules to a ...
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