The Effect of Input Power on ERW Steel Pipe Production

When using high frequency technology to produce ERW steel pipe, controlling the input power of High-frequency welding is very important. So what effect does it have on ERW steel pipe production? And what should steel pipe factory do for that? Next, ERW steel pipe manufacturer Prime Steel Pipe who has years of experience on manufacturing carbon steel pipe will give your answer.

If the input power is too small, the pipe groove is not heated enough to reach the welding temperature, which can cause the welding failure such as pseudo soldering, unsoldering and slag welding. If the power is too large, it will affect the welding stability. When the heating temperature of the pipe groove surface is much higher than the temperature required for welding, which will result in severe splashing, pinholes, slag and other defects, those defect are known as over burning defects. When manufacturing ERW steel pipe, the input power of high-frequency welding need to adjust and determine according to the thickness of the wall and the molding speed. Different molding methods, different unit equipment, and different material grade of steel all need us to sum up from the production line, and work out high-frequency process that suitable for their own equipment.

The Effect of Input Power on ERW Steel Pipe Production

When using high frequency technology to produce ERW steel pipe, controlling the input power of High-frequency welding is very important. So what effect does it have on ERW steel pipe production? And what should steel pipe factory do for that? Next, ERW steel pipe manufacturer Prime Steel Pipe who has years of experience on manufacturing carbon steel pipe will give your answer.

If the input power is too small, the pipe groove is not heated enough to reach the welding temperature, which can cause the welding failure such as pseudo soldering, unsoldering and slag welding. If the power is too large, it will affect the welding stability. When the heating temperature of the pipe groove surface is much higher than the temperature required for welding, which will result in severe splashing, pinholes, slag and other defects, those defect are known as over burning defects. When manufacturing ERW steel pipe, the input power of high-frequency welding need to adjust and determine according to the thickness of the wall and the molding speed. Different molding methods, different unit equipment, and different material grade of steel all need us to sum up from the production line, and work out high-frequency process that suitable for their own equipment.

The factors affect the ERW steel pipe quality during production

In order to ensure the quality of ERW steel pipe during the production process, we need to analysis which factors will affect the product quality. Through a deep data collecting from our

 Φ76mm high frequency welding unit for a month, we believe that the ERW steel pipe quality will be affected by raw materials, welding process, the roll adjustment, roll material, equipment failure, the production environment etc. Among these factors, the raw materials accounted for 32.44%, welding process accounted for 24.85%, the roll adjustment accounted for 22.72%. These three factors are the main factors affect the ERW steel pipe quality during the production. While the roll material, equipment failure, and the production environment are the three factors only accounted for 19.99% which is defined as the less important factors. Therefore, during the ERW steel pipe production process, we need to focus on the factors matters which are raw materials, welding technology and roll adjustment.

Knowledge of ERW Line Pipe

With the rapid development of economy and the continuous improvement of the energy demand, the pipeline as the oil and gas resources has developed in recent years. A number of medium-caliber ERW line pipe unit was completed and put into operation. ERW line pipe has been widely used in the oil and gas field gathering pipelines, oil and gas Spur. This article will focus on the circumferential residual stress on the impact of ERW line pipe manufacturing process and final product quality and control aspects of the problem.

ERW pipe forming process can be divided into two phases: the first stage of

deformation; the second stage for reducing distortion. In both phases, the steel pipe inner layer is always affected by the circumferential compressive stress and compressive deformation. The outer layer of fine molding of the bending process by weeks to the tensile stress and extension deformation: in the fine shaping and sizing process. Steel outer layer of compressive stress and compressive deformation. And ERW pipes of different specifications, the outer layer of the final strain differences. This shows that the ERW pipe inner and outer layers in the pipe circumferential strain is inconsistent. Stress state and stress the size of change.

Common problems in manufacturing process of ERW line pipe:
(1) ERW line pipe manufacturing process will bend uneven deformation of the pipe week up there is a large residual stress, so take the necessary measures to reduce the negative impact of residual stress on the ERW line pipe manufacturing process.
(2) the study and control of ERW line pipe residual stress should not be confined to the detection and analysis of the residual stress of the final product, required to pipe forming process of ERW pipeline analysis, taken from the perspective of process control measures to reduce ERW pipeline the residual stress of the pipe, reduce the adverse effects of residual stress may cause the quality of ERW line pipe.
(3) Sizing is mainly to ensure the pipe diameter to meet the requirements, the hydrostatic test is to ensure that the density of steel pipe, but for the ERW pipeline in terms of pipe, Is also an important process to reduce the circumferential residual stress.

Order---ERW Steel Pipe shipped to Vietnam

Product: ERW Steel Pipe, Electric Resistance Welded, Carbon Steel
Standard: ASTM A53 GR.B/API 5L GR.B/ASTM A106 GR.B
Specification: 609.6mm*9.53mm*5800mm
Surface: Black Painted
Ends: Bevelled
Quantity: 264 Tons
Production Time: 30 days info@primesteeltube.com

 

Tianjin Shinestar Steel Pipe Manufacturing Co., Ltd started production in December 2015

Tianjin Shinestar Steel Pipe Manufacturing Co., Ltd as the largest factory has started production in December 2015.


The new factory is located in Tianjin Jinghai Economic Development Zone. This project started in September 2012 and finished in October 2014. After one year of preperation for production facilities, the factory was officially start production in December 2015. The total investment for this project is around 270 million RMB, and most of our investment is on R&D production equipment. The production lines including for scaffolding pipe, oil casing (ERW Steel Pipe) and SSAW steel pipes. The annual production quantity reaches 150,000 tons of scaffolding pipe, 100,000 tons of oil casing pipe, and 200,000 tons SSAW steel pipes. At present, we have set up 8 production line for Scaffolding Pipes, 2 production line for oil casing pipe, and 4 production line for SSAW Steel Pipe. In the next coming year, we will keep investing two more production line for ERW Steel Pipes. In the next five years, we will have our own Steel Industrial Zone.


" This factory is the first production factory that Shinestar Holdings Group owns the full responsibility. We are committed to building high yield, good performance, and world-class quality steel pipes. Meet customers' increased demand and enhance competitive advantages in the international market is our final goal." Said by Shinestar Holdings Group Vice President. Tianjin Shinestar Steel Pipe Manufacturing Co., Ltd is under the Shinestar Hodings Group and defined as the most important steel pipe production factory in the north of China. Our production will in accordance with the API and ASTM international standard, the products quality will highly meet our international clients' needs. Shinestar Holdings Group will continue to adhere to international development strategy, global distribution, outstanding talent competition, and effective cost control.