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