The distance between the two longitudinal slits of the reel assembly shall be greater than 100mm. The distance between the outer wall of the branch pipe and the weld shall not be less than 50mm.
The rolling pipe production technology requires that the rolling pipe weld is a double-sided weld, two longitudinal welds are allowed, and the weld spacing exceeds 300 mm. The welding appearance and quality standard shall not be lower than the level standard in the welding specification.
.In recent days large-diameter steel plate rolling pipe manufacturers continue to operate with small fluctuations. Among them, the market high line and the pile casing lattice for threaded bridge piling in Taiyuan market increased significantly by 70 yuan / ton. On March 25 in Northeast China, Shenyang market rose slightly by 30 yuan / ton, and the overall situation remained low inventory, low transaction and high. The diameter of spiral steel pipe produced by our factory can be from 219mm to 0mm, and the wall thickness can be from 4mm to 30mm. Main purpose: it is widely used in civil engineering construction such as houses, bridges and roads. The spiral welded steel pipe is rising significantly today. The raw material billet for the production of spiral steel pipe is carbon structural steel or low alloy structural steel after sedation treatment. It has been well used in the chemical industry and agricultural irrigation, and has provided good resources for the transportation and construction industries. According to its own structural characteristics, it has two main uses. It is used for transportation, it can also be used for the transportation of gas, petroleum and other chemical substances. It is used for structure, such as pile driving pipe and bridge, as well as pipe for road, wharf and building structure.
In short, the use standard of coiled steel pipe is very important, and the above points can be reasonably explained. For the information of our rolled steel pipe, let's simply say so much today. If you need it, you can directly consult our manufacturer.
.The diameter of large-diameter thick wall coiled pipe is generally above dn450. Long term supply of hot rolled steel pipe large diameter thick wall rolling pipe, thick wall straight seam rolling pipe steel casing, rolling pipe factory, old brand, price advantage and quality guarantee! Sometimes there are two welds for large-diameter thick wall coiled pipe. Why does this happen? It is mainly due to the problems of raw materials and equipment processing. The steel plate with the required width of large-diameter welded pipe required by the customer is not produced by the steel plant, so the two plates must be welded, so this kind of weld occurs. The main problem of large-diameter 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 large-diameter thick wall coiled pipe is mainly ultrasonic flaw detector, and the longitudinal weld on the same barrel section of the coiled pipe should not be more than two. The group of butt welds of coiled pipe shall be flush. When the nominal diameter is greater than, back sealing welding shall be carried out in the pipe. During pipe rolling processing, the surface damage of the plate shall be prevented.
It is to preheat rather than increase the line energy. Reel needs quality, honest business! Let's talk about our productivity.
The thickness of thick wall coiled pipe is generally greater than 20mm, and the outer diameter range is 450-3000mm. The thick wall coiled pipe is rolled under the condition of steel plate heating Welding forming, rib, factory. Sometimes the wall thickness is relatively thick and secondary heating is required. The feature is that the outer diameter tolerance is small Uniform wall thickness.
Before starting up it is necessary to check whether the hot coil machine operates normally and fill the oil hole with oil.
A series of water conservancy projects such as sand discharge, mud transportation, dredging and hydraulic reclamation. It is generally believed in the dredging industry that spiral pipe is the Zui best pipe for long-distance water conveyance and solid-liquid mixed transportation projects. The sand and mud discharge pipeline products produced by Hebei Xinghao pipeline industry have been used by hundreds of customers in China. Flange welded spiral steel pipe is widely used in long-distance water supply and drainage in various environments and exported to Japan. The connection is completed by adding flange gasket and fastening it with bolts. Some pipe fittings and equipment have their own flanges, which also belong to flange connection.
Weld inspection is necessary to detect the weld quality of steel coil pipe. After welding, all the welds are tested by on-line continuous ultrasonic automatic flaw detector to ensure the NDT coverage of the welds. If there are defects, and the production will adjust the process parameters at any time to eliminate the defects in time.
Quality inspection report.The thickness of thick wall coiled pipe is generally greater than 20mm, and the outer diameter range is 450-3000mm. The thick wall coiled pipe is rolled under the condition of steel plate heating Welding, forming, rib, defect detection, factory. Sometimes the wall thickness is relatively thick and secondary heating is required. The feature is that the outer diameter tolerance is small Uniform wall thickness.
The rolling pipe production technology requires that the rolling pipe weld is a double-sided weld, two longitudinal welds are allowed, and the weld spacing exceeds 300 mm. The welding appearance and quality standard shall not be lower than the level standard in the welding specification.
Have we learned about the packaging process of the steel used? Today, let's discuss the packaging process of lower thick wall coil.
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, 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, the rolling process also includes measuring or stamping on the package. Using mechanical packaging products can improve productivity, 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.
Customer first.Clean the iron oxide scale falling off in the process of plate drum to prevent the iron oxide scale from bonding and the surface of steel plate.
The electric contact pressure gauge is used to press down the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transportation of strip steel.
Due to the continuous application of thick wall coiled pipe in industry and the continuous expansion of its scope, it has many advantages. In order to prevent the thick wall coiled pipe from rusting, we can apply antirust oil on the surface of the thick wall coiled pipe.
.The rolling pipe production technology requires that the rolling pipe weld is a double-sided weld, two longitudinal welds are allowed, and the weld spacing exceeds 300 mm. The welding appearance and quality standard shall not be lower than the level standard in the welding specification.
The pipeline installation sequence shall be adopted according to the principle of zoning and subsystem. First the lower level, then the upper level, and then the difficulty. In principle, the pipes connected to the machine are arranged from inside to outside to reduce the impact of welding stress on the installation accuracy of the machine. The joints of indoor and outdoor pipes shall be left outdoors. Q345B thick wall continuous pipe is a widely used carbon steel material. Q345B thick wall continuous pipe with thickness greater than 10mm is widely used in drainage engineering, dredging pipeline, construction pipeline, etc. Q345B thick wall continuous pipe is a welded steel pipe product with relatively simple and flexible process. This kind of steel pipe is usually not in stock and is customized. If the quantity is small, the raw materials are not good. The main problem of Q345B thick wall continuous pipe is welding. As long as possible, delivery related requirements can be compared with other products.
Weight per meter of steel plate coil = (outer diameter wall thickness) * wall thickness * 0.0246615 steel plate coil is made of steel plate. Thick wall t-welded coil can be divided into coil and hot rolled thick wall coil.