Pre-bending and sizing would be the main steps in the spiral tube forming process. The key function of 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 primary purpose of the sizing is to obtain a more accurate diameter of the tube, because the diameter control is definitely the main quality index of the Galvanized Cast Iron Pipe Fittings. one. The right match between pre-bending and sizing must get an ideal steel pipe blank.
This 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 use of arc thermal energy welding, and manual welding rod arc welding differs: the submerged arc welding from the welding wire is exposed, there is no coating, submerged arc welding is definitely pre-paved welding flux to become welded The submerged arc welding wire extends in to the flux, as well as the arc is formed under the flux. The formation process of the submerged arc welding is really that the welding wire is in contact with the workpiece.
Following the start button is pressed, the welding wire and also the workpiece are energized, as well as 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 under the flux layer, as well as the welding pool is formed below the arc. Across the arc, the flux melts to make a cavity. The cavity and the pool still advance, and also the metal behind the pool solidifies to form a continuous weld. This procedure is conducted under the flux, so that we can’t see it with the human eye. It could be seen with X-ray photography.
Considering that 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, 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. Additionally, it offers 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, therefore it is still widely used.
1. Pressure-bearing fluid is mainly employed for the X46 welded pipe as the tube blank, and it is often spirally formed in temperature. It is actually used for welding with double-sided submerged arc welding and is mainly utilized for spiral seam welded steel pipe devices for pressure fluid transportation. The capability of the steel pipe to resist pressure is strong and also the welding performance can also be very good. After a number of 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, also it can effectively save your time and money of laying pipelines. It really is 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 way of general low-pressure fluid conveying spiral seam high-frequency welded steel pipe. Welding steel with spiral welds.
3. The new rolled steel strip is used since the tube blank, which can be often formed by spiral molding and consists 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 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 technique for water, gas, air and steam and 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 employed 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, the usage of safe and reliable, large diameter steel pipe, transmission efficiency can also be 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”.
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