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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 -
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 ...Read more -
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...Read more -
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...Read more -
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...Read more -
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 ...Read more -
How to check the quality of galvanized seamless steel pipe?
There are two types of galvanized seamless steel pipes, hot-dip galvanizing (hot-dip galvanizing) and cold-dip galvanizing (electro-galvanizing). Hot-dip galvanizing has a thick galvanized layer, which has the advantages of uniform coating, strong adhesion, and long service life. However, the cos...Read more