All the cracks occur at -mm away from the edge below the alloy pipe, and the macroeconomic orientation is vertical to the cold rolling orientation, showing a 'high mountain' shape.Generally there are many passivation methods for alloy tubes, the common ones are high temperature passivation or sodium cyanide passivation.U.S.A, If the surface of the welded pipe is rusty, we can polish the appearance of the welded pipe with a wire brush to prevent rust.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.Al Fallujah,The shape of I-beam is similar to that of H-beam. What is the difference between them?When selecting I-beam in structural design, reasonable I-beam shall be selected according to its mechanical properties, chemical properties, weldability and structural size. I-beam is mainly divided into ordinary I-beam, medium and narrow flange I-beams.Heating surface pipes it is divided into wide, economizers, superheaters, reheaters, pipes for petrochemical industry, etc. for high-pressure boilers (working pressure is generally above MPa and working temperature is between ℃ ~ ℃)

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.General welded pipe: General welded pipe is used to transport low-pressure fluid. It is made of qa,U.S.APrice of No. 20 seamless pipe, qa and QA steel. It can also be made of other mild steel that is easy to weld. Water pressure, zigzag flattening and other tests shall be carried out for steel pipes, and there are certain requirements for surface quality. Generally, the delivery length is -m, and steel pipe can be divided into threaded and non threaded according to the way of pipe end. The small length of repair welding is mm; The raw material shall not exceed mm after grinding by welding edge.Production department,U.S.AHow much is 65 galvanized pipe,The system is mainly composed of control box, finishing roller, pre leveling unit, finishing unit and straightening unit.Plan scheme : Martensitic chromium alloy pipe and chromium alloy pipe with Cr composition exceeding %, without high carbon steel and high chromium alloy pipe. The aqueous solution contains % sodium cyanide % ~ % (volume ratio), the solution temperature is ~ ℃, and the solution time is min. Peak crack

When we carry out different projects, we must use different raw materials, which can ensure the quality of the project. In many kinds of data, alloy pipe is widely used. In many projects,U.S.AHow much is 30 I-beam per meter, we will apply it, so it is very popular in the field. When people carry out the construction of alloy pipe project, there are many things that must be paid special attention to. Let&#;s take you to know:Respect for customers,→ the two surfaces of the flange are parallel to each other, making it easy to connect, process and install.Thin wall steel pipe, thick wall steel pipe.I-beam can be divided into four types according to shape: cold-formed equal edge I-beam, cold-formed unequal edge I-beam, cold-formed inner crimping I-beam and cold-formed outer crimping I-beam.U.S.A,Because the section size of ordinary I-beam and light I-beam is relatively large and narrow, the moment of inertia of the two main shafts on the section is quite different, which limits its application range. I-beam shall be selected according to the requirements of design drawings. In the structural design, the use of I-beam should be reasonably selected according to the mechanical properties, chemical properties, weldability and structural size of I-beam.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