20# straight s
20# straight s
20# large diamHave we learned about the packaging process of the steel used? Today, let's discuss the packaging process of lower thick wall coil.
Today's equipment is double-sided submerged arc welding, because it goes without saying that double-sided welding is necessary here.
.The cold deformation process is adopted for the sizing of thick wall rolling pipe end. The commonly used sizing includes punch expanding and punch expanding + sizing ring compression. It has long provided various hot rolled steel pipes, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, rolling pipe factory, on-site settlement and honest operation for individuals and enterprises all over the country. There are offices in various places, which can cooperate for a long time. When punch expanding, it can reduce the ovality of steel pipes The effect depends on the uniformity of steel pipe wall thickness. For hot-rolled pipes with serious uneven wall thickness, such as steel pipe rolled by periodic pipe mill (see pipe rolled by periodic pipe mill), in order to eliminate the influence of uneven wall thickness and reduce the ovality of steel pipe, punch expanding + sizing ring compression method should be adopted.
Diameter of rolled steel pipe: sometimes the diameter of the demand plan is different from that of the supplier.
.Cold rolled thick wall continuous pipe is similar to cold rolled thick wall continuous pipe, with wall thickness of 20mm and outer diameter of 450-3000mm. Steel plate is directly rolled, welded, formed, butted and reinforced. Cold rolled thick wall pipe has the characteristics of short processing time, fast delivery and low cost. Cold rolled thick wall pipe is mainly used for: pipe billboard, column, etc.
The continuous pipe has good characteristics and performance in use, and advanced technology is adopted. If we want to make progress and enhance competitiveness, we must have a good opportunity at present. Just like the development of the iron and steel industry although the pipe rolling industry has made remarkable achievements in recent years, accounting for more than 1 / 4 of the world's output, there is still a certain gap with the international advanced level in terms of technical equipment, product quality and product grade, enterprise economic scale and main technical and economic indicators. The coil adopts PLC automatic system, and each part is operated on the panel. The cutting length of winding tube adopts photoelectric induction, accurate positioning and automatic cutting. Each process adopts double pump oil pressure system to ensure stable operation. The pipe rolling has different application ranges: winding pipe length: 0-1400mm, winding pipe thickness: 2-15mm, winding pipe diameter: 20-200mm, purpose: 3 inches x24x, working voltage: 380V, 50Hz. It can be used according to the specified parameters and scope, so as to ensure that it can play an important role and value in use. Large coil is durable stable and easy to operate. The packaging process of coil includes filling, packaging, sealing and other main processes as well as relevant pre and post processes such as cleaning, stacking and disassembly. In addition, reduce labor intensity, meet the needs of large-scale production and meet the requirements of cleanliness and hygiene. With the emergence of new packaging materials and the continuous innovation of packaging technology, spiral pipe can play an important role and value in different industries and fields.
Service specification of coiled steel pipe: there are spiral welded pipe and seamless pipe, and the pressure resistance of gas and water is different.
Have we learned about the packaging process of the steel used? Today, let's discuss the packaging process of lower thick wall coil.
Generally, the production technology of thick wall coil can be divided into cold drawing and hot rolling. The production process of cold rolled thick wall coil is generally more than that of hot rolling. The pipe blank must first be tested by roll sizing. Assuming that the surface does not take care of the crack, the round pipe should be cut by cutting machine. Sometimes there are two welds in thick wall coil. Why does this happen? It is mainly because of the problems of raw materials and materials Equipment processing problem. The steel plate with the required width of the welded pipe required by the customer is generally not produced by the steel plant, so the two plates must be welded, so this kind of weld occurs. The main problem of thick wall coiled pipe is welding. As long as the flaw detection can be carried out, the delivery can be carried out. The relevant requirements are broader than other products. The detection of thick wall coiled pipe is mainly For the ultrasonic flaw detector, the longitudinal weld on the same cylinder section of the coil pipe should not be more than two. The group of the butt weld of the coil pipe should be flush. When the nominal diameter is greater than, the back sealing welding should be carried out in the pipe. During the processing of the coil pipe, the surface damage of the plate should be prevented. The cost is high. The hot-rolled thick wall coil pipe is widely used: oil cylinder, hydraulic pressure, bridge, roller, etc. & amp; quot; quality control 2 thick Compared with seamless steel pipe thick wall rolling pipe has the disadvantages of low cost, rapid delivery, thick wall rolling pipe breaking the fixed specification of seamless steel pipe, etc. professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing,Q235B straight seam welded pipe, rolling pipe factory and other products have a full range of products, which sell well at home and abroad, and the equipment has a long service life! Products are the leader in the electric wire industry. Welcome to call for consultation Inquiry. Quality department 3 editing of welding process and welded pipe type
The main purpose of preheating is to reduce the cooling rate of welded joints and preheat temperature. As can be seen from the table, preheating can reduce the cooling rate, but basically does not affect the time spent at high temperature, which is ideal. Therefore, when welding thick wall coils with hardening trend, the main technical measure to reduce the cooling rate and hardening trend is preheating rather than increasing the line energy. Plasma cutting of thick wall coiled pipe is more effective than gas cutting
Click to view.In addition, when the pipe rolling equipment is made, we should not have more than two longitudinal welds on the same cylinder section of the pipe rolling. For long-term pipe rolling, Q235B pipe rolling, Q345B pipe rolling, large-diameter thin-wall pipe rolling, large-diameter thick wall pipe rolling, stainless steel pipe rolling, L360 pipe rolling and 16Mn pipe rolling,45# welded steel pipe, the products are complete, the quality is excellent and the price is favorable. The distance between the two longitudinal welds should not be less than 200.
Generally, the wall thickness of the coiled pipe is 20mm and the outer diameter is 450-3000mm. It is directly welded, formed, rolled, butted, removed and reinforced from the steel plate. The coil pipe has the advantages of short processing time, fast delivery and low cost. The rolling pipe is mainly used for pipes, billboards, etc.
Be able to show important value in different industries and fields. When the coiled pipe is greater than 600mm, two longitudinal welds are allowed, and the spacing shall be greater than 200mm.