steel tube

　　After the stainless steel hot-rolled coil is pickled, a strip of 8-18 mm wide and long strips is commonly found on both sides of the strip, which is called a side turn. Since the rollover cannot be eliminated after cold rolling, it directly affects the surface quality of the cold rolled product, so it is generally trimmed and delivered. In actual production, the width of the rollover should be controlled as much as possible. 　　 Mechanism and causes of rollover formation: 　　1, Because the large surface of the continuous casting slab is sharpened after grinding, and the side is not ground, after heating and oxidation, the side is rough. After rough rolling, the four corners and the unground metal are extended to the surface. Forming a rollover; 　　2, The rough rolling vertical roller wears large, and the width of the rollover is widened quickly; 　　3, The width of the blank material fluctuates greatly, and the trapezoidal direction in the longitudinal direction causes the vertica...

　　The use of seamless steel pipe is very wide, such as natural gas pipeline, oil companies, chemical companies, power pipes, heat pipes, water supply and drainage pipes, steam heating, hydro power station pressure pipe, thermal power, water and other long-distance pipeline and piling, bridges, steel and other engineering fields. 　　1. GB/T8162-2008 (structural seamless steel pipe with galvanized steel pipe) is mainly used in general structure and mechanical structure. Its representative material (grade) is: carbon steel, 20,45 steel, alloy steel Q345, 20C galvanized steel pipe, 40Cr, 20CrMo, 30-35CrMo, 42CrMo and so on. 　　2. GB/T8163-2008 (seamless steel pipe for transporting fluid) is mainly used for engineering and large equipment on the delivery of fluid pipelines. On behalf of the ceramic composite pipe material (grade) is 20, Q345 and so on. 　　3. GB/T3087-2008 (low and medium pressure boiler seamless steel pipe) is mainly used for industrial boilers and live boilers transpor...

　　There are two modes of seamless steel pipe production, hot rolled and cold rolled, and there is a slight difference between two approaches. Next, Prime Steel Pipe will introduce those respectively for all of you. 　　Hot-rolled seamless steel pipe production process: 　　1. Hot-rolled (extruded seamless steel pipe): round tube → heating → perforation → three roll inclined rolling, rolling or extrusion → release → sizing (or reducing diameter) → cooling → straightening → water pressure test (Or flaw detection) → mark → storage 　　Cold-rolled seamless steel pipe production process: 　　2. Cold drawn (rolled) seamless steel pipe: round tube → heating → perforation → start → annealing → pickling → oil (copper) → multi-pass cold drawn (cold-rolled) → billet → heat treatment → straightening → water pressure test (flaw detection) → mark → storage 　　Prime Steel Pipe has over 20 years to manufacture seamless steel pipe, we can provide the highest quality and the best price. If you are inte...

　　Defects on the seamless steel pipe internal and external surface have a great influence on the performance of high-pressure boiler tubes using. As a leading seamless steel pipe manufacturer, Prime Steel Pipe will adopt some measures to control quality in the production process of seamless steel pipe. 　　1, Add hot ingot, billet surface and perforation of the capillary inner and outer surfaces are determined by the shortage tube outer diameter surface, remove oxide skin, eliminating the resulting scarring and other defects. 　　2, Use high-quality work, excellent mold and process for lubrication to prevent sticking during rolling of steel, defects, excessive wear and other phenomena, to eliminate the resulting straight, scratching, rolling off, cracks and other defects. 　　3, Use protective gas heat pipe. No shielding gas should be heat-treated steel shot blasting, sanding, etc. Overall, the surface of iron oxide to eliminate defects and improve surface quality and ease of surface ...

　　There are more and more people choose to use carbon steel pipe in the construction. Why? Next, Prime Steel Pipe will show you some advantages of carbon steel pipe for all of you. 　 　A.Safe and durable 　　We all know that steel is a frequently-used material because it is durable and safe. Since steel is non-combustible and makes it harder for fire to spread, it is good to use when building homes. Carbon steel pipe is highly resistant to shock and vibration. Fluctuating water pressure or shock pressure from a water hammer have little effect on steel. And carbon steel pipe is practically unbreakable in transport and service, and for this reason it is okay to lay water mains under roadways. 　 　B. Environmental protection 　　Using steel for pipes is not only safer for people, but it is safer for the earth. Steel can be recycled. Each year, about 70 percent of all steel is recycled in North America, more than paper, aluminum, plastic and glass combined. Steel products can be recycle...

　　In order to improve the seamless steel pipes for oil transportation, usually the surface should be treated for corrosion resistance. Common treatments include: cleaning, descaling, pickling, shot blasting four methods. 　　1. Cleaning. The grease, dust, lubricants, organic matter on the surface of seamless steel pipes usually can be cleaned by solvent or emulsion. But for rust, scale, welding slag can not be removed, that will need further process. 　　2. Remove rust by tools. Use a wire brush to polish the oxidation, rust, welding slag on the surface of seamless steel pipes. Tools can be divided into manual and power tools. Manual tools can reach class 2 level, power tools can reach class 3 level. For stubborn scale, it is possible can not be removed by tools, that will need further process. 　　3. Pickling. Common pickling include chemical and electrolytic methods. However, the corrosion resistance for seamless steel pipe should be chemical pickling. Chemical pickling steel surfac...

　　 Galvanized steel pipe is a steel pipe that has been coated with zinc. This coating protects the steel from corrosion. It is most commonly used for outdoor construction like fences and handrails, or for some interior plumbing. It is also sometimes called galvanized iron pipe. Do you kown the reason why is so popular? 　　Below is three main using advantages of Galvanized Steel Pipes you might want to know: 　　1. After being hot-dip galvanized, the pipes of the surface will be protected well. Compared with other type of coating process, deepen the zinc is easier to let the coating covered well. 　　2. Because the zinc coating has a larger hardness value than steel pipes. After being galvanized, the impact resistance and anti-ware properties of the steel pipes has increased. 　　3. In general, the zinc layer at the pipe ends will be relatively thicker than other type of coatings. Therefore, it offers better toughness and abrasion resistance to the Galvanized Steel Pipes.