Linyi medium thick wall square tube wholesale manufacturer
Wall thickness grading of rectangular pipes - extra thick rectangular pipes, thick rectangular pipes, thin rectangular pipes. The thick wall rectangular pipe is a galvanized welded square pipe used for low pressure fluid escort, which is only used for ordinary low pressure fluid, mainly used for water, gas, oil, hot water or steam escort; Galvanized welded thick wall rectangular pipe for low pressure escort is mainly used to escort ordinary low pressure fluids such as water, gas, oil, hot water or steam. The surface of the square pipe adopts hot galvanizing or cold galvanizing anti-corrosion process. The rectangular thick wall mining infusion welding square tube is mainly used for mining air pressure welding, row welding, shaft drop welding, etc.
Linyi medium thick wall square tube wholesale manufacturer
Application: It is widely used in machinery manufacturing, construction, metallurgy, agricultural vehicles, agricultural greenhouses, automobile industry, railways, highway guardrails, container frameworks, furniture, decoration and steel construction. It is used in engineering buildings, glass curtain walls, door and window decoration, steel construction, guardrail, machinery manufacturing, automobile manufacturing, home appliance manufacturing, shipbuilding, container manufacturing, electricity, agricultural construction, agricultural greenhouses, bicycle racks, motorcycle racks, shelves, fitness equipment, leisure and tourism products, steel furniture, various specifications of oil casing, oil pipes and pipeline pipes, water, gas, sewage Air, heating and other fluid escorts, fire protection and support, construction industry, etc.
Linyi medium thick wall square tube wholesale manufacturer
The quality of seamless square tube is better and the price is more expensive. The welded square tube is welded by bending the plate. There is high temperature in the welding process, which will affect the metal structure, and its mechanical properties are not as stable as seamless steel tubes. Welded square tube is a hollow square section steel square tube, also known as hollow cold-formed steel. It is a square section steel with overall dimensions made of hot rolled or cold-rolled strip steel or coil steel by high-frequency welding after cold bending and forming. In addition to the thickening of the wall thickness, the size of the corner and the straightness of the edge of the seamless square tube have reached the extent that they exceed the resistance welded cold formed square tube. The size of the R corner is generally between 2 and 3 times of the wall thickness. It can also consume R corner square tubes of the size required by customers according to their needs. Seamless square tube is a kind of long steel with hollow section and no seams around. It is a square tube formed by extrusion of seamless tube through four sides of the mold. The square tube has a hollow section and is widely used as a pipeline to escort fluid. It is mainly used in liquid escort, hydraulic support, mechanical structure, medium and low pressure and high pressure boiler tubes, heat exchange tubes, gas, oil and other industries. It is more stable than welding and will not show cracks.
Linyi medium thick wall square tube wholesale manufacturer
1. Solid bending: solid bending, which literally means that the bending is compacted, and the inner and outer rollers and the inner and outer walls of the tube blank are compacted in both directions during solid bending. 1) The advantage of real bending is small elasticity, accurate forming, and only accurate roll shape is required. The R of internal angle forming is relatively accurate. 2) The defect of real bending is tensile/thinning effect. 1、 The actual bending will produce tension at the bend, and the tensile effect will shorten the longitudinal length of the bending line; 2、 The metal at the solid bend will become thinner due to stretching. 2. Empty bending: empty bending is the bending moment formed by the one-way contact between the outer roll and the outer wall of the tube blank to bend the strip. Empty bending will cause the bending line to shrink, and the shrink effect will make the bending line longitudinally extend, and the metal at the bend will appear to accumulate and thicken, which is the shrink/thicken effect of empty bending. 1) The advantage of empty bending is that it can stop the bending of side length when the real bending cannot be stopped, such as the synchronous bending and finishing of the upper/side edges of square and rectangular tubes. Empty bending can also bend the inner corner with R<0.2t without breaking the pipe wall. 2) The defect of empty bending is that when the upper side/side side are synchronously empty bending, because the upper roll and the lower roll produce pressure at the same time, the forming force is easy to exceed the critical point, forming the edge instability concave, and also will affect the stable operation of the unit and the forming quality. This is also the different characteristics of square and round tubes during empty bending.
Linyi medium thick wall square tube wholesale manufacturer
There are more and more manufacturers of seamless square and rectangular tubes. The demand and market sales are accumulated day by day, which means that the manufacture of seamless square and rectangular tubes is stopped by virtue of many advantages and characteristics of seamless square and rectangular tubes. Seamless square and rectangular tubes can be said to be icing on the cake in terms of processing technology and manufacturing process. The wear resistance and ductility of the process are relatively good. The products manufactured are smooth in appearance and superior in performance! The seamless square and rectangular tube has good strength, toughness, plasticity, welding and other process properties, and has good ductility. Its alloy layer is firmly attached to the steel base. Therefore, the seamless square and rectangular tube can stop cold punching, rolling, wire drawing bending and other forming without damaging the coating. It is suitable for ordinary processing such as drilling, cutting, welding, cold bending and other processes. The seamless rectangular tube after hot galvanizing has a bright and beautiful appearance. Seamless square and rectangular tube can be divided into seamless tube and welded tube. Seamless square and rectangular tube is extruded from seamless round tube. Generally, it can be selected and used according to detailed requirements. Due to its excellent performance, seamless rectangular tubes are widely used in such aspects as glass curtain walls, power towers, communication networks, water and gas escorts, wire casings, houses, bridges, metal structures, etc.
