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Characteristics and technological process of steel pipe cold processing
Cold processing of steel pipes (such as seamless tubes) includes methods such as cold rolling, cold drawing, cold tension reduction and spinning, which are the main methods for producing precision thin-walled and high-strength pipes. Among them, cold rolling and cold drawing are commonly used hig...Read more -
Pipe Welding Procedure
Under the welded pipe from the top of the arc, from top to bottom all-position welding technique, the method of welding speed, weld appearance, good welding quality, you can save welding materials, reduce labor intensity, which is a common SMAW can not be compared and now more widely used in larg...Read more -
The weld edges heated temperature
(LSAW - Longitudinal Submerged Arc Welding), it was the same as manual welding (LSAW – Longitudinal Submerged Arc welding), which was the same as the manual welding of LSAW-Longitudinal Submerged Arc welding. The place is that it is with the mold residue, but the slag is not the coated elec...Read more -
Reasons for the rust of spiral welded pipe
Spiral welded pipes (ssaw) are stacked outdoors, and most of them are buried underground when in use, so they are easy to corrode and rust. In order to ensure the smooth flow of the pipeline, the spiral welded pipe must have strong corrosion resistance. Once the pipeline is corroded, it will caus...Read more -
How to choose seamless pipe, welded pipe and forged pipe?
When you’re first looking for steel pipe, whether for a desalination plant, an oil rig, or a nuclear power plant, the first question you need to ask yourself is “do I need seamless, welded, or forged “pipes”?” These three Each type has different benefits and is there...Read more -
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 ...Read more -
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...Read more -
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...Read more -
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 &...Read more -
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...Read more -
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...Read more -
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...Read more