→ compared with general section steel, high precision and small residual stress. It does not need expensive welding materials and weld detection, and saves about % of the manufacturing cost of steel structure.Its heat sealing effect is remarkable. It can be directly buried immediately, which can not only save resources, but also reduce consumption not occupy the natural environment, but also purify the environment. The transportation of gas can meet the requirements of long-distance transportation, prevent actual operation and maintenance, meet the requirements of thermal insulation and cold protection, reduce heating equipment,portland Welded pipe production and wholesale, unique and convenient installation, and reduce the construction cycle time of the project. On the whole, while small welded pipes and thick wall welded pipes must only be welded immediately according to nylon tape. After simple grinding and polishingWelded pipes with large or thick diameter are usually made of steel blank immediately, metal wire drawing is OK.I-beam has wide flange, thin web, many specifications and flexible use. It can save metal by % ~ % when used in various truss structures. Because the inner and outer sides of the flange are parallel and the edge end is at right angles, it is easy to assemble and combine into various components, which can save about % of the welding and riveting workload, greatly accelerate the construction speed of the project and shorten the construction period.Ternopol, Cross rolling pass system. This pass system refers to that the two open legs of the I-beam pass are not on the same side of the waist at the same time, and the waist has an included angle with the horizontal axis.The shape of small longitudinal crack on the surface of alloy pipe is less than mm The overall width is less than mm The depth is lower than .mm.When selecting I-beam in structural design, reasonable I-beam shall be selected according to its mechanical properties, chemical properties, weldability and structural size.

The defects can be removed by grinding with sand wheel, but the remaining wall thickness must be within the allowable standard.What are the quality protection measures for galvanized pipe during weldingThe utility model has the advantages that the axial force of the roll is small, the axial movement is small the working inclined plane is not required, the pass occupies a small length of the roll body, and more passes can be matched under the condition of a certain length of the roll body.query,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, 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.With the development of steel structure buildings, only I-beam is not enough, that is, thickened I-beam,portland Spiral welded pipe wholesale, which is easy to lose stability for load-bearing columns. Mixed pass system. According to the characteristics of rolling mills and products, that is, the combination of more than two systems. For example, straight leg cross rolling pass system is adopted for finished hole and front hole of finished product, and bent leg cross rolling system is adopted for other passes; or direct rolling system is adopted for rough rolling hole and straight rolling system is adopted for the last ~ finish rolling holes Leg oblique tie hole, etc.

Generally, there are many passivation methods for alloy tubes, the common ones are high temperature passivation or sodium cyanide passivation.query,Difference and application description between H-beam and I-beam Platform reinforcement mesh is a widely used reinforcement mesh product, such as industrial maintenance platform,portland 25 price per meter of galvanized pipe, berm, etc. this kind of reinforcement mesh is widely used in industry, municipal administration, electric power, coal mine and other fields, and has the strongest resistance to surface impact, especially the reinforcement mesh with a cross bar spacing of mm has a strong ability to resist lateral impact.Whether I-section steel is ordinary or light because the section size is relatively high and narrow, the moment of inertia of the two main axes of the section is quite different, so it can only be directly used for members bent in the plane of their web or form lattice stressed members. It is not suitable for axial compression members or members with bending perpendicular to the web plane, which makes it very limited in the scope of application. I-beam is widely used in buildings or other metal structures.portland ,Generally, the process of pickling and passivation will be carried out for alloy pipes, but the alloy pipes after pickling and passivation are very easy to rust. Therefore, the way to find a solution to wiredrawing corrosion is 'grinding and polishing'. Due to grinding and polishing, there is no harm to carry out hot galvanizing in the middle and later stage.Passivation treatment operation of alloy pipeWhat are the uses of I-beam?