Pisack2205 duplex steel welded pipeQuality record control procedures

Greatly reduce the environmental pollution caused by abrasion, damage and blanking, and increase the labor cost of material cleaningThe finished product has smooth surface, low friction coefficient, flatness error + / - mm / m length, wear resistance and maximum temperature of ℃Pisack, The zinc layer obtained by electroplating is relatively pure, which corrodes slowly in acid, alkali and other fog, and can effectively maintain the steel matrix;Heating surface pipes, economizers, superheaters, reheaters, pipes for petrochemical industry, etc. for high-pressure boilers (working pressure is generally above MPa and working temperature is between ℃ ~ ℃)Nakhon Sawan, light I-beam and wide flange I-beam. According to the height ratio of flange to web, it is divided into wide, medium and narrow flange I-beams. The specifications of the first two are -, that is the corresponding height is -. At the same height, the light I-beam has narrow flange, thin web and light weight. Wide flange I-beam also known as H-beam, is characterized by two parallel legs and no inclination on the inner side of the legs. It belongs to economic section steel and is rolled on four high universal mill, profiled steel plate, etc.). Due to the reasonable section shape, they can make the steel give more play to its performance and improve the cutting capacity. Different from ordinary I-type,Pisack219 how much is a ton of seamless pipe, the flange of H-section steel is widened, and the inner and outer surfaces are usually parallel, so it is convenient to connect with other components with high-strength bolts. Its size composition is reasonable, series and models are complete, which is convenient for settingDue to the unique performance of I-beam,PisackWhich is a good welded pipe manufacturer, I-beam has successfully solved the problem of serious equipment wear in many industries.

The key purpose of grinding and polishing alloy pipe is to moisten the surface, and the relevant limit accuracy or appearance change is not easy to change.From the situation of chiseling on site, the reinforcement mesh laid by the construction party is cm below the surface layer, which greatly exceeds the specification, and then the crack resistance of the reinforcement mesh can be reduced. Because of the increasing temperature, the effect of thermal expansion and cold shrinkage and the characteristics of concrete, the cracking of surface layer is significant.I-beam is a kind of economical section steel with better section mechanical properties. Its characteristics are as follows:Promise and keep promise,Ways to obtain surface compressive stress characteristics of alloy tubesWhat is nitriding of alloy pipeI-beam is a kind of economical section steel with better section mechanical properties. Its characteristics are as follows:

X-ray or ultrasonic testing shall be carried out for repair welding of alloy pipe, dead end welding of strip steel and circumferential seam. For the spiral welding of steel for the transportation of flammable general liquids, yibai%sx ray or ultrasonic testing shall be carried out. For the spiral welding of alloy pipes for the transportation of water, wastewater, gas, heating steam and other general liquids, X-ray or ultrasonic testing sampling inspection (%) shall be carried out.Project scope,After isothermal quenching treatment, and its weight is only one fifth of that of anti steel.H-section steelPisack,The flange of H-beam is of equal thickness,PisackHow much is DN200 galvanized pipe per meter, including rolling section and combined section composed of three plates welded. All I-beams are rolled sections. Due to poor production technology the inner edge of the flange has a slope of : The rolling of H-beam is different from that of ordinary I-beam. Only one set of horizontal rolls is used. Because its flange is wide and has no inclination (or the inclination is very small), a group of vertical rolls must be added for rolling at the same time. Therefore, its rolling process and equipment are more complex than ordinary rolling mills. The maximum height of rolled H-section steel that can be produced in China is mm, which exceeds the welded composite section.The core of C-section steel is the structural system of braced frame. More than half of such senior managers in China are the former. Unfavorable to earthquake resistance. Hydraulic power, and the power is large, generally about KW, which is similar to the plate shearing and bending machine. The general control process is complex, and PLC control is mostly used.X-ray or ultrasonic testing shall be carried out for repair welding of alloy pipe, wastewater yibai%sx ray or ultrasonic testing shall be carried out. For the spiral welding of alloy pipes for the transportation of water, gas, heating steam and other general liquids, X-ray or ultrasonic testing sampling inspection (%) shall be carried out.