Product Details
SMLS steel pipe can be divided into different types, and different types of seamless steel pipe can be used in different environments. First of all, we need to know what types of products they have in order to make it easier for us to choose the right products for us. According to the production method, seamless pipe is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, pipe jacking and so on. According to the shape of the section, seamless steel pipe can be divided into two types: circular and irregular. According to different uses, there are thick-walled and thin-walled tubes.
SMLS steel tubes are widely used. Seamless steel pipes for general use are rolled by common carbon structural steel, low alloy structural steel or alloy structural steel. They are mainly used as pipes or structural parts for conveying fluids.
1.Architectural categories include: more underground pipeline transportation, pumping groundwater when building, boiler hot water transportation and so on.
2. Machining, bearing sleeve, processing machinery accessories, etc.
3. Electrical category: gas transmission, hydroelectric fluid pipeline.
Generally, the production process of seamless steel pipe can be divided into cold drawing and hot rolling. The production process of cold-rolled seamless steel pipe is generally more complex than hot rolling. First, the billet must be rolled three rolls, then the diameter of the tube must be measured after extrusion. If the surface does not respond to cracks, the round tube must be cut by cutting machine, and the billet with a growth of about one meter is cut. Then enter the annealing process, annealing with acid liquid pickling, pickling should pay attention to whether there is a large number of bubbles on the surface.
The welded steel pipe is its weak link, and the quality of weld is also the main factor affecting its overall performance. It can be seen from this that the performance, especially the bearing capacity, has been greatly improved compared with ordinary steel pipe, so it is often used in high-pressure equipment. Seamless pipes can be applied to fluid conveyor pipes, boiler plants, engineering, mechanical processing plants and other fields. Good SMLS steel pipes are not only reflected in their service life, but also relatively strong in the use process. On the contrary, poor seamless pipes will appear in the use of such problems. Below is a small ribbon to show you how to identify the advantages and disadvantages of seamless pipes:
1. Fake and inferior seamless pipes are prone to fold: folding is a variety of broken lines formed on the surface of steel pipes, which often penetrates the longitudinal direction of the whole product. The reason for folding is that fake and inferior manufacturers pursue high efficiency, large reduction and ears, folding will occur in the next rolling, folded products will crack after bending, and the strength of seamless tubes will decrease greatly.
2. The appearance of fake and inferior seamless tubes often has the phenomenon of flax surface: flax surface is caused by irregular concave and uneven surface of steel due to serious groove wear. Because the fake and inferior seamless pipe manufacturers want to pursue profits, groove rolling often exceeds the standard.
3. Scars are easily formed on the surface of fake seamless tubes.
4. Cracks are easy to occur on the surface of fake and inferior materials. The reason is that the billet is adobe and there are many air holes in the adobe. During the cooling process, the adobe is subjected to thermal stress, resulting in cracks, and there are cracks after rolling.
5. Fake and inferior seamless pipe is easy to scratch, because fake and inferior seamless pipe manufacturer equipment is simple, easy to produce burrs, scratch the surface of steel, deep scratch reduces the strength of steel.
6. The cross-section of the fake and inferior seamless pipe is elliptical. The reason is that in order to save material, the reduction of the front two passes of the finished roll is too large. The strength of this kind of thread steel decreases greatly, and it does not conform to the standard of the shape and size of the thread steel.
