LSAW Steel Pipe

　　Corrosion is one of the main reasons for the damage and failure of buried pipelines. For the long-distance pipeline and centralized pipeline network of natural gas transmission, the corrosion of buried pipelines cannot be directly discovered and is inconvenient for maintenance. How to prevent corrosion damage is a key factor of pipeline safety engineering. According to the corrosion part, the corrosion of buried carbon steel pipe can be divided into internal corrosion and external corrosion. 　　Internal Corrosion 　　The internal corrosion of pipeline is caused by corrosive chemical components in the transported medium. Different medium cause different corrosion factors. For example, natural gas is high in H2S, CO2, water content and dust, which may lead to perforation and burst accidents. The internal corrosion of pipeline is not only the result of multiple external factors, but also related to pipeline material and manufacturing method, as well as stress. 　　External Corrosion ...

Casing Pipe : Common Uses and Applications Casing pipe is a type of steel pipe that is typically used to enclose and surround a carrier pipe, which is installed through the center of this pipe. Steel casing pipe is most often used in underground construction projects to encase or protect utility lines from being damaged. This pipe can be used when boring horizontally or directionally under roads, rivers, lakes, or railroads. In general, steel casing pipe is extremely durable and versatile, and therefore, it can be used in a variety of construction projects as well.Casing Pipe is available in a complete variety of different sizes and diameters as well as in straight seam, spiral-weld, and rolled and welded types of manufacture. Uses for Casing Pipe Casing pipe is most often used for underground boring to encase and protect pipe. During horizontal underground boring projects under streets, highways, railroads, rivers, and streams, steel casing pipe can be jacked in segments into ...

　　Scaffolding is a tool often used in industrial operations. Their construction effects and effects can bring the simplicity and speed of work. But for them. 　　After use, especially if exposed for a long time, they will cause them to produce various dirt phenomena. Therefore, regular cleaning is what people do. So how do we clean them up? 　　Therefore, we bring several points to note. 　　First, pay attention to the choice of cleaning agent. When we clean them, we must pay attention to the effect of the detergent. Acidic and alkaline detergents are not the best choice. 　　Sexual cleaning agents are the best choice, and they are the conditions that make scaffolds clean and fresh. Therefore, when we choose cleaning agents, we must pay attention to their chemical properties. 　　Second, pay attention to the clean way. The clean method refers to the effect of drying, drying, or air-drying after cleaning. For scaffolding, the effects of different materials are suitable for different cle...

　　Petroleum special pipe is mainly used for drilling of oil and gas wells and transportation of oil and gas. It includes petroleum drilling pipe , petroleum casing, and sucker pipe. Oil drill pipe is mainly used to connect drill collar and drill bit and transmit drilling power. Oil casing is mainly used to support the borehole wall during and after drilling to ensure the normal operation of the entire oil well during and after the drilling. The sucker pipe mainly transports oil and gas from the bottom of the well to the surface. 　　Oil casing is the lifeline to maintain oil well operation. Due to the different geological conditions and the complex state of the downhole force, the combined effects of tensile, compressive, bending and torsional stresses on the pipe body put forward higher requirements on the quality of the casing itself. Once the casing itself is damaged for some reason, it may lead to a reduction of the entire well or even scrap. 　　According to the strength of the st...

　　Benefits: It can destroy the casting structure of steel ingots, refine the grains of steel, and eliminate the shortcomings of microstructures, thereby making the steel structure dense and improving mechanical properties. This improvement is mainly reflected in the rolling direction, so steel is no longer isotropic to a certain extent. Bubbles, cracks and looseness formed during the casting process can also be welded under high temperature pressure. 　　Disadvantages: After hot rolling, non-metallic inclusions in the steel are pressed into thin slices, and delamination (sandwich) occurs. Delamination greatly reduces the effect of pulling the steel in the thickness direction, and delamination may occur when welding is shortened. Welding shortens the bow | strain, and the part strain usually reaches several times the yield point strain. 　　The residual stress caused by uneven cooling is much larger than the strain caused by load. Residual stress is an internal self-phase equilibrium st...