Pre-bending and sizing are 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 of the tube, as the diameter control is definitely the main quality index of the Stainless Steel Urban Gas Pipeline. one. A suitable match between pre-bending and sizing is required to obtain an ideal steel pipe blank.
The following is a quick 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 is unique: the submerged arc welding in the welding wire is exposed, there is no coating, submerged arc welding is indeed pre-paved welding flux to get welded The submerged arc welding wire extends to the flux, and the arc is actually created beneath the flux. The development procedure of the submerged arc welding is really that the welding wire is in contact with the workpiece.
After 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 lose beneath the flux layer, and the welding pool is created below the arc. Around the arc, the flux melts to create a cavity. The cavity and the pool continue to advance, and also the metal behind the pool solidifies to create a continuous weld. This process is carried out under the flux, so that we can’t see it using the naked 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 type of high production efficiency; the development auxiliary time is less, the time for changing the welding rod is saved; the welding conditions are clean and no spatter, and also the cleaning time is saved; the standard of the welding seam is high. Additionally, it provides the necessary conditions for that delivery from the spiral welded pipe plant, in order that the production duration of the big spiral steel pipe is guaranteed, so it is still commonly used.
1. The stress-bearing fluid is mainly employed for the X46 welded pipe since 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 also mainly used for spiral seam welded steel pipe devices for pressure fluid transportation. The capability from the steel pipe to withstand pressure is strong and also the welding performance can also be very good. After a variety of rigorous scientific inspections and tests, the use situation is fairly safe and reliable. The solid diameter of the steel pipe is large, the transmission efficiency can also be high, and it can effectively save your time and money of laying pipelines. It is actually mainly employed for pipelines that transport oil and natural gas.
2. General low-pressure fluid transport is primarily 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 new rolled steel strip can be used as the tube blank, which is often formed by spiral molding and is made from double-sided submerged arc welding or high-frequency welded steel pipe. It is used for the xqrkab pile steel pipe for civil building structures, wharves, and bridges.
4. The general 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 way of water, gas, air and steam as well as other general low-pressure fluid transport Submerged arc welded steel pipe.
5. Pressure fluid transport is situated on the hot-rolled steel strip for tube blanks, regular temperature spiral molding, high-frequency lap welding method used 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 number of strict and scientific inspections and tests, using safe and reliable, large diameter steel pipe, transmission efficiency is additionally high, and can effectively save the laying pipeline investment. It is 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”.
Address: APT. 1202 BLDG. B Kuang Shi Guo Ji Plaza, Tianjin Free Trading Testing Zone (Business Center), Tianjin, China.
Hamer Chen:[email protected]
Eason Gao: [email protected]
Miao lin: [email protected]
Amy Shi: [email protected]
Hamer Chen:+86 18202505824
Eason Gao: +86 18622403335
Miao lin: +86 13251845682
Amy Shi: +86 18630426996