Pre-bending and sizing would be the main steps within the spiral tube forming process. The key reason for pre-bending is always to solve the rebound problem of the tube blank, because the size of the rebound directly affects the intrinsic quality of the steel tube; the primary purpose of the sizing is to acquire a better diameter in the tube, as the diameter control is the main quality index of the 90 Degree Bend. one. An appropriate match between pre-bending and sizing is required to get an ideal steel pipe blank.
This is a brief discussion on the formation process and characteristics of submerged arc welding of galvanized spiral steel pipes with 630*3 ribs. The principle of submerged arc welding: Submerged arc welding is using arc thermal energy welding, and manual welding rod arc welding is different: the submerged arc welding from the welding wire is exposed, there is not any coating, submerged arc welding is definitely pre-paved welding flux to be welded The submerged arc welding wire extends to the flux, as well as the arc is formed underneath the flux. The development procedure for the submerged arc welding is such that the welding wire is in contact with the workpiece.
Right after the start button is pressed, the welding wire as well as the workpiece are energized, and also the welding wire is returned. Withdrawing, the arc ignites, the welding carriage advances, the welding wire is continuously conveyed downwards, the arc is maintained to shed beneath the flux layer, as well as the welding pool is formed beneath the arc. Round the arc, the flux melts to create a cavity. The cavity and also the pool carry on and advance, and the metal behind the pool solidifies to make a continuous weld. This method is carried out beneath the flux, so that we can’t see it using the human eye. It can be seen with X-ray photography.
Since the spiral steel pipe adopts the welding technology of submerged arc automatic welding, besides this sort of high production efficiency; the development auxiliary time is less, enough time for changing the welding rod is saved; the welding conditions are neat and no spatter, and also the cleaning time is saved; the caliber of the welding seam is high. Additionally, it provides the necessary conditions for your delivery of the spiral welded pipe plant, so that the production time of the larger spiral steel pipe is guaranteed, therefore it is still widely used.
1. The stress-bearing fluid is mainly utilized for the X46 welded pipe because the tube blank, and it is often spirally formed in temperature. It is actually used for welding with double-sided submerged arc welding and it is mainly utilized for spiral seam welded steel pipe devices for pressure fluid transportation. The ability in the steel pipe to resist pressure is strong as well as the welding performance is also great. After many different rigorous scientific inspections and tests, the use situation is relatively safe and reliable. The solid diameter from the steel pipe is big, the transmission efficiency is also high, and it can effectively save the investment of laying pipelines. It is mainly employed for pipelines that transport oil and natural gas.
2. General low-pressure fluid transport is mainly hot-rolled steel coiled tube blanks, often temperature spiral molding, using high-frequency lap welding way of general low-pressure fluid conveying spiral seam high-frequency welded steel pipe. Welding steel with spiral welds.
3. The hot rolled steel strip can be used since the tube blank, which can be often formed by spiral molding and is made from double-sided submerged arc welding or high-frequency welded steel pipe. It really is used for the xqrkab pile steel pipe for civil building structures, wharves, and bridges.
4. The overall low-pressure fluid transport is hot rolled steel strip coiled tube, regular temperature spiral molding, using double-sided automatic submerged arc welding or single-sided welding technique for water, gas, air and steam as well as other general low-pressure fluid transport Submerged arc welded steel pipe.
5. The stress fluid transport is situated on the hot-rolled steel strip for tube blanks, regular temperature spiral molding, high-frequency lap welding method utilized for pressure fluid transmission spiral seam high-frequency welding steel pipe device. The steel tube has strong pressure bearing capacity and good plasticity, which facilitates welding and processing. After a variety of strict and scientific inspections and tests, the use of safe and reliable, large diameter steel pipe, transmission efficiency is also high, and can effectively save the laying pipeline investment. It is actually mainly used for the laying of pipelines connecting petroleum, natural gas, etc.
Rise Steel consisted of subsidiaries of Cangzhou Spiral Steel Pipe Factory, Hebei All Land Steel Pipe Factory, Hebei Yuancheng Steel Pipe Factory, Cangzhou Xinguang Thermal Insulation Pipe Factory .The company is located in Tianjin port, the largest comprehensive port and an important foreign trade port, engaging in the management of steel pipe production nearly 20 years.The company is a high-tech enterprise integrated with independent production and sales business.We are committed to the concept of “innovation, technology and service”.
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