The side length of I-beam is small and the height is large, so it can only bear the force in one direction.Due to the relatively high and narrow section size of ordinary I-beam and light I-beam, the moment of inertia of the two main axes of the section is quite different,KrichevHow much is 65 welded pipe per meter, which makes it very limited in the scope of application. The use of I-beam shall be selected according to the requirements of design drawings.Krichev,Since the s, with the rapid development trend of high-quality hot strip mill production and the development of electric welding and testing technology the welding quality has been continuously improved, the types, specifications and models of welded steel pipes are increasing, and seamless pipes have been replaced in more and more industries. Welded steel pipes are divided into straight seam welded pipes and spiral welded pipes according to the way of welding. Classified by production mode: classified by processing technology - electric arc welded pipe, resistor welded pipe, (high frequency, low frequency) gas welded pipe, furnace welded pipe.According to the theory of steel structure, the I-beam flange should be stressed, that is, the I-beam should be standing rather than lying down.As Sib,Main uses: as a finished material, tools and mechanical parts, and used as building frame structural parts and escalators in buildings. Flat steel is divided into two types according to its shape: plane spring flat steel and single-sided double groove spring flat steel. Hot rolled spring flat steel is mainly used to manufacture leaf springs for automobiles, railway transportation and other machinery.Nitriding: also known as nitriding, it is the process of penetrating nitrogen atoms into the surface layer of steel. At present, gas nitriding is widely used in the production of alloy steel pipe.The system is mainly composed of control box, finishing roller, pre leveling unit, finishing unit and straightening unit.

Passivation treatment operation of alloy pipeGalvanized pipe is a kind of light thin-walled steel pipe with hollow square section, also known as steel cold-formed profile. It is a section steel with square section shape and size which is made of Q hot-rolled or cold-rolled strip or coil as the base material, cold bending and high-frequency welding. In addition to wall thickness thickening, the corner size and edge flatness of hot rolled extra thick wall galvanized pipe reach or even exceed the level of resistance welding cold formed galvanized pipe. Good comprehensive mechanical properties, weldability, cold and hot workability and corrosion resistance, and good low temperature toughness. Small longitudinal crackHow much does it cost?,I-beam: national standard * what is the wall thickness of I-beamAccording to the national standard of hot rolled H-section steel in China (GB / t-, H-section steel is divided into narrow flange wide flange and steel pile, whose codes are Hz, HK and Hu respectively. Narrow flange H-section steel is suitable for beams or compression bending members, while wide flange H-section steel and H-section steel piles are suitable for axial compression members or compression bending members. Compared with H-section steel,KrichevWhat is the inner diameter of 8-inch welded pipe, W, IX and iy are not as good as H-section steel under the premise of equal weight.The wear resistance, fracture toughness, and then the heat treatment process of GCrMo was determined. Development and application of ZYS- bearing damping and antirust oil. Bearing is a new type of multial damping and antirust oil. It takes refined mineral oil as the base oil and is equipped with various additives such as antirust and antifriction. Through comparison test, matching test with lubricating grease and user test, it is proved that ZYS- bearing damping and antirust oil has outstanding damping effect and good antirust lubrication performance.

So why is the alloy pipe easy to rust after being pickled and passivated by the software?Quality inspection report,Pass design According to the pipe wall thickness, pipes made of relatively thin materials such as steel strip can be welded with high frequency, and some thin-walled pipes can be welded with shielding gas; Pipes with wall thickness more than mm can be welded by hand.Defects of alloy pipe and solutions:Krichev, Hot hole breaking cold rolling method. This method is dominated by expansion and expands vertical sliding and skew rolling. The former one is mainly cold rolling by relatively limited mandrel mill, cold rolling by few station mandrel mill, cold rolling by three high limited mandrel mill and cold rolling by fluctuating mandrel mill. In this way, the advantages of high efficiency, low metal material consumption, small types,KrichevHow much is the steel bar sample for a month, multi specifications and high precision. Therefore, it is widely usedPassivation treatment operation of alloy pipePlan option : Martensitic chromium alloy pipe,