LSAW Steel Pipe

　　There are now more and more types of vehicles, and seamless steel tubes play an important role in the manufacture of vehicles. For example, the application of seamless steel pipe in vehicles mainly refers to the use as a bracket. Due to the hollow structure, the weight is light, and the weight of the vehicle is not additionally increased, the occupied space is also small, the material cost is saved, and the economy is economical. In addition, seamless steel pipes are also used in construction vehicles, ships, aircraft, and the like. 　　1. The application of seamless steel pipe in bicycles, because the seamless steel pipe is hollow structure, light weight. if used for bicycle brackets, it will be light and flexible. Moreover, the seamless steel pipe has a strong bearing capacity and pressure resistance, and can support a large weight. It is used to support the structure of the bicycle, which can carry weight and travel easily. 　　2. Seamless steel pipes play an important role in the...

　　1. Brinell hardness HB 　　The Brinell hardness is obtained by pressing the hardened steel ball indenter into the surface of the material to be tested with a certain load P, and then unloading after a certain period of time, according to the indentation area A of the diameter d of the press-in. 　　HB is mainly used for steel, cast iron, non-ferrous metals and some special non-metallic materials in annealed state. It is suitable for metal materials with HB<450. 　　For example, the Brinell hardness is recorded as 200HB10/1000/30. This means that the steel ball having a diameter of 10 mm has a hardness of 200 measured after being held for 30 s under the action of 1000 kgf. 　　2. Rockwell hardness HR 　　Rockwell hardness is measured by pressing the diamond cone indenter into the surface of the material with a specified pressure and measuring the indentation depth h: 　　HR = (K-h) / 0.002 　　According to the size of the indenter and the load, the Rockwell hardness is divided into...

　　 Precision seamless steel pipe is called cold-rolled precision seamless steel pipe. Because the inner and outer walls of precision seamless steel tubes have no oxide layer, high pressure and no leakage, high precision, high smoothness, no deformation of cold bending, flaring, flattening without cracks, etc., they are mainly used to produce pneumatic or hydraulic components, such as Cylinders or cylinders are all made of seamless tubes. The chemical composition of precision seamless steel tubes is C, Si, Mn, S, P, Cr. 　　The difference between precision steel pipe and seamless steel pipe 　　1. The obvious difference with the seamless steel pipe is: high dimensional accuracy, which can reach 0.05mm. 　　2. The surface roughness of the inner and outer diameter of the precision steel pipe is high, and the customer can directly use it without processing; and the ordinary seamless steel pipe requires the customer to perform latheing and polishing. 　　Grade: 14CrMnMoVB 　　Material Name...

　　The API standard is short for the American Petroleum Institute. It is one of the production standards for oil pipeline steel pipes. It also includes API5L ASME A53 and some other standards. 　　The oil casing is an important equipment for oil drilling. Its main equipment also includes drill pipe , core pipe and casing, drill collar and steel pipe for small diameter drilling. 　　Tubing specifications: 8-1240 × 1-200mm 　　Standard: 　　API SPEC 5CT - American Petroleum Institute Standard 　　SYT 6194-2003 — Oil and gas industry, oil and gas well casing or tubing for oil pipe 　　Use: Pipes that are used in production or liquid injection 　　The main production of steel pipe grade: J55, K55, N80, L80, P110, etc. 　　Tubing classification: non-thickening tubing (NU), outer thickening tubing (EU), integral joint tubing (IJ) 　　In the API5CT, the casing and tubing are divided into 4 groups and 19 steel grades. According to the manufacturing method, it is divided into two categories: sea...

　　3PE anti-corrosion steel pipe refers to 3-layer structure polyolefin coating (MAPEC) anti-corrosion steel pipe, which is a kind of anti-corrosion pipe commonly used in China. Others include IPN8710, FBE epoxy powder, and epoxy coal tar pitch. 　　 Steel pipe outer wall anticorrosion 　　3PE anti-corrosion generally consists of three layers of structure: 　　The first layer of epoxy powder (FBE>100um) 　　The second layer of adhesive (AD) 170 ~ 250um 　　The third layer of polyethylene (PE) 2.5 ~ 3.7mm 　　In the actual operation, the three materials are mixed and integrated, and processed to make it firmly combined with the steel pipe to form an excellent anti-corrosion layer. The processing method is generally divided into two types: winding type and round mold coating type. 　　3PE anti-corrosion steel pipe coating is a new anti-corrosion steel pipe coating produced by the combination of European 2PE anti-corrosion coating and North American widely used epoxy powder anti-corrosi...

　　Steel tube starts out as flat steel strip that has been slit to the correct width for the end tube size. It is then passed through a series of rolls that form it into a round tube. After the steel has been formed it passes through a weld box. The weld box for ERW tube uses electrical resistance of the steel tube to create heat. This heat is what welds the two steel edges together. Using this method will produce a strong weld that is just as strong as or stronger than the original steel. 　　After welding the surface left behind, known as flash is removed if there is a requirement to do so. After the flash control process the tube travels through a cooling box that is filled with special coolant. Once the tube leaves the cooling box it now goes through a group of finishing rolls. These finishing rolls are used to change the shape of the tube and make the final dimensions. Common shapes include: round, square, rectangle, oval, & octagonal. Following the finishing process the tube i...

　　 Galvanized Steel Pipe Using Advantages 　　When we talk about the galvanized steel pipes, we usually refer to the hot dipped galvanized steels pipes which are more durable and strengthened than any other types. The cleaning process which the hot dipped galvanized steel pipe uses is far more special in the combination use of the solutions, including the ammonium chloride, zinc chloride or the mixed solutions of both. And it will be sent into the hot dipped groove afterwards. The galvanized steel tube will be with more even layer of the galvanization and the capacity of cohesion, anti-corrosion and anti-dust. All of these as mentioned above will contribute to this kind of steel pipe to be have longer longevity than any other steel pipe kinds. 　　The regular specification of the galvanized steel tubing which are available from SHINESTAR include 48.3×2.5、48.3×2.75、48.3×3.0、48.3×3.25、48.3×3.5 and other customized types per required. 　　To maintain these galvanized steel tubes, we shou...

　　 Carbon steel pipe manufacturer in China was informed from last week, more than in response to continuous haze weather, emergency introduction of a series of initiatives. For example, the 17th night, Shijiazhuang municipal government introduced a series of emergency measures, from November 2016 to December 31, 2016, the main city of motor vehicle odd and even number limit line, pipe and other seven major industries all stop production, the units Wrong when to get off work. At the same time, Taiyuan, Shanxi Province, November 17 night release of heavily polluted yellow weather warning, which is the city since the beginning of winter issued the first yellow warning. Pipe, coking, electricity and other key industries and enterprises to limit production limited row, the focus on polluting enterprises 24-hour factory inspection, all urban housing construction, demolition construction, municipal, roads and other sites to stop earthwork operations. 　　Steel production impact will be affec...

　　ERW straight seam resistance welding steel pipe and straight seam submerged arc welding (UOE) of steel pipe 　　1、 the difference between raw material and production capacity 　　 ERW steel pipe raw material is hot rolled steel coils, UOE pipe raw material is hot rolled steel plate. So the ERW steel tube can realize continuous assembly line work, high production efficiency, production cost is low; And UOE pipe made with steel plate processing, unable to realize continuous assembly line, the production efficiency is low, the production cost is high. 　　ERW steel pipe limited by the thickness of the steel coil, general can produce the biggest thickness is 25 mm, it can produce the biggest diameter is 660 mm; And can produce the maximum thickness of UOE pipe to 40 mm, it can produce the largest diameter is only restricted by steel plate width, now can produce maximum diameter is 1422 mm. 　　2、 the welding 　　ERW steel pipe welding does not need to add solder wire; UOE pipe is added ...

　　Last week, the domestic market price of ERW welded pipe has experienced a sharp decline, including rebar, hot rolled coil and other varieties of the national average weekly price fell more than 3%, the futures market price is surging, rebar 1701 contract price from High 3220 fell to 2697 yuan / ton, down 523 yuan / ton, the largest decline of 16.2%. Iron ore, 1701 contract fell from 656.5 to 524.5 yuan / ton, the largest decline of 20%; the spot market, iron ore prices fell nearly 10% of the price of iron ore, , While the spot price of coke rose 8.6% contrarian. 　　It should be said that this round of falling prices in the expected, but the magnitude of price volatility and market rhythm of the conversion may exceed expectations. November 12, ascribed to sell into the night still makes people tremble with fear, when the superposition of speculative capital frenzy, the futures market, "a feather" is not difficult to imagine. Go back to think about logic, everything is so n...