Pre-bending and sizing would be the main steps in the spiral tube forming process. The primary reason for pre-bending is 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 key purpose of the sizing is to acquire a better diameter in the tube, as the diameter control is the main quality index of the Seamless Octg Pipe. one. An appropriate match between pre-bending and sizing is needed 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 key of submerged arc welding: Submerged arc welding is the usage of arc thermal energy welding, and manual welding rod arc welding differs: the submerged arc welding in the welding wire is exposed, there is absolutely no coating, submerged arc welding is definitely pre-paved welding flux to get welded The submerged arc welding wire extends to the flux, as well as the arc is created underneath the flux. The formation procedure for the submerged arc welding is such the welding wire is in touch with the workpiece.
Following the start button is pressed, the welding wire and also 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 burn under the flux layer, as well as the welding pool is created underneath the arc. Around the arc, the flux melts to make a cavity. The cavity as well as the pool still advance, as well as the metal behind the pool solidifies to form a continuous weld. This procedure is performed underneath the flux, so we can’t view it with the human eye. It could be seen with X-ray photography.
Since the spiral steel pipe adopts the welding technology of submerged arc automatic welding, besides this kind of high production efficiency; the development auxiliary time is less, enough time for changing the welding rod is saved; the welding conditions are clean and no spatter, and the cleaning time is saved; the caliber of the welding seam is high. In addition, it supplies the necessary conditions for the delivery in the spiral welded pipe plant, so the production period of the large spiral steel pipe is guaranteed, so it will be still widely used.
1. Pressure-bearing fluid is mainly used for the X46 welded pipe because the tube blank, and is also often spirally formed in temperature. It really is utilized for welding with double-sided submerged arc welding and is mainly utilized for spiral seam welded steel pipe devices for pressure fluid transportation. The ability of the steel pipe to resist pressure is strong as well as the welding performance is additionally very good. After a number of rigorous scientific inspections and tests, the use situation is comparatively safe and reliable. The solid diameter of the steel pipe is large, the transmission efficiency is additionally high, also it can effectively save the investment of laying pipelines. It really 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 technique for general low-pressure fluid conveying spiral seam high-frequency welded steel pipe. Welding steel with spiral welds.
3. The hot rolled steel strip is used since the tube blank, which is often formed by spiral molding and is made of double-sided submerged arc welding or high-frequency welded steel pipe. It is actually employed for the xqrkab pile steel pipe for civil building structures, wharves, and bridges.
4. The typical 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 and other general low-pressure fluid transport Submerged arc welded steel pipe.
5. Pressure fluid transport is based 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 usage of safe and reliable, large diameter steel pipe, transmission efficiency is also high, and will effectively save the laying pipeline investment. It really is mainly employed for the laying of pipelines connecting petroleum, 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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