steel tube

　　KG and Mpa both are unit to express steel pipe pressure, what is the relationship between them? 　　1. the project said "kg" is abbreviated, the actual is "kg / square centimeter." 　　2.1 kg / cm2 = 0.1 MPa. 　　3. "Kg / cm2" and "MegaPascal", "KPa" and "Pa" can be used as pressure units to indicate the pressure of gas and liquid in pressure vessels or pipes. 　　4.KG and MPa can also be used to express the stress of material (such as steel), that is, the force per unit cross-sectional area of material. 　　Added: Strictly speaking, MPa is the unit of pressure, kg is the quality unit. Common usage refers to all the pressure per square meter, 1MPa = 1 * 1000000Pa, 1Pa = 1Newton per square meter, 1kg pressure = 1kg * 9.8Newton per square meter. 　　1 kg is equivalent to how many MPa water pressure? 　　The pressure in the project how many "kg" is the idiom, 1kgf / cm ^ 2 = 1 * 9.8N * 10000 / m ^ 2 = 98000Pa = 0.098...

　　1. Chemical composition 　　Requirements for harmful chemical elements such as As Sn Sb Bi Pb and gas NHO are required. In order to improve the uniformity of chemical composition in steel and the purity of steel, reduce the non-metallic inclusions of the billet and improve its distribution, furnaces are often used. The external refining equipment refines the molten steel, and even re-melts the tube blank by using an electroslag furnace. 　　2. Size accuracy and shape 　　The geometrical dimensions of the seamless steel pipe mainly include the outer diameter, wall thickness, ellipticity, length, curvature, pipe end slope, groove angle and blunt edge of the steel pipe, and the cross-sectional dimensions of the opposite-shaped steel pipe. 　　3. Surface quality 　　The requirements for "smooth finish" of seamless steel tubess are specified in the standard. Common defects are: crack, hairline, inflection, outer folding, rolling, inner straight, outer straight, separation layer,...

　　Straight seam welded pipe (ERW straight seam welded steel pipe) is formed on the hot rolled plate of the forming machine, the skin effect and proximity effect of the high frequency current, melting of the pipe edge heating to the extrusion roller pressure welding to achieve production. The application of high-frequency resistance welding method in pipeline production in the 1950s has witnessed more and more mature production technology and continuous improvement of product quality in the past decade or so. 　　First of all, in the quality of raw materials, the production of ERW steel pipe has been significantly improved, the composition of the steel design of low carbon, low P, S, micro-alloying; smelting process smelting, ladle refining, vacuum degassing, continuous casting and other new technologies In addition to the ERW controlled rolling and cold rolling process, the technology has enabled the appearance size of the hot rolled steel strips of large and medium caliber ERW steel ...

　　High-frequency pipe has many problems. Pipe opening is one of them. Below we will introduce you the problem and its relevant solutions. 　　 (1) Characteristics 　　Crack openings > = 0.4 mm. Welded joint is straight. Plate edge end face without melting trace or with melting trace is not welded. Both ends of cracks are very pointed and extend along the weld direction. Leak seriously when testing water pressure. 　 　(2) Causes 　　1) The blank width is less than the negative tolerance, so high-frequency steel tubes can not be welded. 　　2) Roller bearing is damaged which results in insufficient pressure. 　　3) The heat output is not enough, and the welding temperature is too low. 　　 (3) Methods of prevention 　　1) Check frequently strip steel geometric dimension. It is prohibited to use strip steel with ultra width and negative deviation. 　　2) High frequency heat output and welding speed should be matched properly. 　　3) Check whether the roller bearing is damaged or not. ...

　　 OCTG is a kind of upscale product made of steel pipes, and it has many kinds. There are 15 kinds of specifications for OCTG diameters, and the outer diameter ranges from 114.3mm to 508mm. There are 11 kinds of steel grades, such as J55, K55, etc. There are many types and requirements of the pipe ends' threads, and the ones which can be manufactured are STC, LC, BC and VAM, etc. The manufacturing and installation process of OCTG involve a lot of testings as follow: 　　1. Ultrasonic Testing 　　When ultrasonic waves propagate in the tested material, acoustic characteristics of the material and changes of internal structures have a certain influence on the propagation of ultrasonic waves. We can know the changes of material's performance and structure by the influence degree and condition of the ultrasonic waves. 　 　2. Radiographic Testing 　　The radiation level of penetrating normal parts and defective parts of OCTG is different, which will cause different blackness of th...

　　Large-diameter seamless steel pipe thermal molding manufacturing process is mainly used for the following components: 　　automotive hoses: steering tube, brake pipe, air conditioning pipes, fuel pipes, cooling pipes, cooling hoses, heater hoses, air filter hoses, turbo system hose, engineering hydraulic hose; air hose and manifold; hard pipe or fittings and other automobile brake pump, radiator, oil cooler, cylinder; engineering hydraulic hose is mainly used for hydraulic equipment, engineering machinery, mining machinery, such as hydraulic pipe burst test; pressure equipment body, such as the need to detect the cylinder pressure, the burst test. 　　Device Features: 　　1. With a gas-driven automatic booster pump, the output pressure can be easily adjustable, controllable; 　　2. Advanced technology, reasonable structure design. With small size, light weight, elegant appearance characteristics; 　　3. All bearing parts are international famous brands of standard parts, without any...

　　No doubt that stainless steel pipe’s corrosion resistance would be its one of attributes for customer’s love for it. Today, let's talk about the advantages of stainless steel pipe. And thus we can now how to choose the right one for our engineering project. 　　Stainless steel pipe give human being a number of benefits. 　　First of all, compared with regular steel pipe, stainless steel pipe with alloys offers greater cryogenic toughness. This means they can have a higher work hardening rate, increased strength and hardness, greater ductility, a more attractive appearance, and lowered maintenance costs. 　　What’s more, due to the five families of stainless steel alloys: austenitic, ferritic, martensitic, duplex, and precipitation hardening. We need to figure out the rightful one for our current engineering project. 　　 http://www.xysteelpipe.com/info/Beneficial-characters-of-stainless-steel-pipe-1257-1.htm

　　Hot rolled carbon square pipe and cold formed steel hollow section square pipe is a process, they have a great impact on the microstructure and properties of steel, rolled steel, hot-rolled mainly based, only for the production of cold-rolled trumpet steel and sheet. 　　Hot-rolled 　　Pros: You can destroy ingot casting organizations, grain refinement of steel and eliminate defects microstructure, so that the steel dense tissue mechanical properties are improved. This improvement is mainly reflected in the direction along the rolling direction to a certain extent in the steel is no longer isotropic; pouring formed bubbles, cracks and loose, can be welded at a high temperature and pressure. 　　Disadvantages: After hot rolling, the hot rolled square hollow section steel pipe inside the non-metallic inclusions (mainly sulphide and oxide, and silicates) is pressed into the sheet, delamination (interlayer) phenomenon. Layered in the thickness direction of the steel tension performance ...

　　Galvanized steel pipe with corrosion resistance and wear resistance are relatively strong, is commonly used for fence, fence, fence, balcony guardrail etc., and has been widely used in municipal engineering, road, factory, school, development zone, garden, Plaza, community and other places. 　　Standard chemical and mechanical pipe seamless steel pipe , because of its large volume so widely used in petroleum chemical industry, machinery manufacturing and other industries, seamless steel pipe, because its weight is relatively large, so in the market than the expensive galvanized steel pipe. 　　Galvanized steel pipe in a certain extent is on the surface of the seamless steel tube is coated with a layer of zinc, galvanized steel type is not fixed, there may be raw materials are welded pipe, seamless pipe impossible. 　　Galvanized steel pipe corrosion resistance in seamless steel pipe, seamless steel pipe bearing capacity than galvanized steel stronger, galvanized steel pipe galvanized...

　　Steel is a super alloy that has found fundamental resonance with the construction and engineering activities of entire diversity. The invention as steel (as opposed to the iron) re-defined the building tasks because of its noted attributes like sturdiness, high tensile strength and corrosion resistance among others. Dedicated metallurgical interventions were done to develop differentiated matrix of steels. Hot rolled and cold rolled steel types relate to the rolling processes that are employed when forming base products like stainless steel bars, sheets, steel round bars and slabs which are then used for other products of direct utility. While hot and cold rolled steels are not distinguished through different grades (which are more function of alloy composition), the techniques involved in both processes do generate specific distinctions in the two types. 　 　Hot rolled and cold rolled steels 　　The difference is exemplified in the name – hot and cold rolled. The steel that is roll...

　　Alloy steel seamless pipe is a kind of seamless steel pipe , its performance much higher than the general seamless steel pipe, because it containing higher Cr with high temperature and low temperature resistance, corrosion resistance, so the alloy pipe widely used in petroleum, chemical, electric power, boiler and other industries 　　Alloy tube material 　　12Cr1MoV, P22 (10CrMo910) T91, P91, P9, T9, WB36, Cr5Mo (P5, STFA25, T5,) 15CrMo (P11, P12, STFA22), 13CrMo44, Cr5Mo, 15CrMo, 25CrMo, 30CrMo, 40CrMo. 　　Implementation of national standards 　　DIN17175-79, JISG3467-88, JISG3458-88, GB5310-95, GB9948-88, ASTMA335 / A335m, ASTMA213 / A213m. 　　ASME SA210 - American Boiler and Pressure Vessel Code 　　ASME SA213 - American Boiler and Pressure Vessel Code 　　DIN17175 - German industrial standard 　　GB / T8162-2008 ---- Chinese national standard 　　GB / T8163-2008 ---- Chinese national standard 　　GB / T6479-2000 ---- Chinese national standard 　　GB / T9948-2006 ---- Chinese n...

　　An elbow is a pipe fitting installed between two lengths of pipe or tubing to allow a change of direction, usually a 90° or 45° angle, though 22.5° elbows are also made. The ends may be machined for butt welding, threaded (usually female), or socketed, etc. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow. 　　Key Specifications/Special Features and Materials 　　the material is selected accoding to the application use such as high temperature use,sanitary fitting,regular industrial use etc. 　　Carbon steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6, WPHY-42/46/52/56/60/65/70 　　Stainless steel: ASTM A403 WP304/304L, WP316/316/L, WP321, WP347 and WPS31254 　　Alloy steel: ASTM A234 WP1/WP12/WP11/WP22/WP5/WP7/WP9/WP91 　　Abrasion resistant material:Ceramic lined, Ceramic tile lined , Bi-metal clad pipe, 　　Manufacturing standards: ANSI, ISO, JIS and DIN. 　　The ends of pipe elbows may be machined for butt welding , threaded , or socke...

　　There are lots of engineering projects which are in high temperature and pressure. Under this situation, multiple customers would tell the supplier that they would consider the seamless steel pipe first. However, even for this category, we can still have different materials. 　　So, we can have a deep discussion for it together today. 　　High temperature carbon steel pipe: ASTM A179, A210 steel pipe’s specification covers carbon steel seamless pipe for high-temperature service. So they can work in heat exchangers, condensers. More lists would be shown in website. 　　High temperature alloy steel pipe: ASTM A213, A209 steel pipe’s specification covers alloy steel seamless pipe for high temperature service. This alloy steel pipe would be suitable for bending and similar forming operations. 　　High temperature stainless steel pipe: High temperature stainless steel tubing would keep their mechanical properties when exposed to elevated temperatures on either a short- or long-term basis....

　　Elbow is a kind of pipe fittings installed two lengths of pipe or tube allows to change direction, usually 90 °, 45 ° Angle, although 22.5 ° elbow. The ends may be machined for butt welding, threaded (usually female), or socketed, etc. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow. 　　Elbows are design features as below 　　A 90 degree elbow is also called a “90 bend” or “90 ell”. It is a fitting which is bent in such a way to produce 90 degree change in the direction of flow in the pipe. It used to change the direction in piping and is also sometimes called a “quarter bend”. 　　A 90 degree elbow attaches readily to plastic, copper, cast iron, steel and lead. It can also attach to rubber with stainless steel clamps. It is available in many materials like silicone, rubber compounds, galvanized steel, etc. The main application of an elbow (90 degree) is to connect hoses to valves, water pressure pumps, and deck drains. These elbows can be m...

　　Precision seamless steel pipe is a cold drawn or hot-rolled after treatment of a high-precision steel pipe. As the precision seamless steel pipe inside and outside the wall of non-oxidized layer of precision seamless steel pipe, to withstand high pressure without leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks, etc., is mainly used to produce pneumatic or hydraulic components Of products, such as cylinders or cylinders, are made of seamless tubes. Precision seamless steel pipe chemical composition of carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, chromium Cr. 　　Difference between precision steel pipe and seamless steel pipe 　　1, the main features of seamless steel pipe is no welding seam, can withstand greater pressure. The product can be very rough as-cast or cold-drawn parts. 　　2, precision steel pipe in recent years there are products, mainly within the hole, the outer wall size has a strict tolerance and rough...