Key attributes about Welded Pipe

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В компании Kehuan мы внедряем стратегии управления изменениями, специально разработанные для сталелитейной промышленности и легко интегрированные в нашу деятельность. Наш подход не только обеспечивает немедленную выгоду для клиента, но и закладывает основу для долгосрочных преимуществ в рамках существующего портфеля стальной продукции.

Индивидуальный продукт

Индивидуальные решения по разработке продуктов для удовлетворения конкретных потребностей клиентов.

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Экспертное руководство по выбору продукта, оптимизации конструкции и внедрению.

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Профиль компании

Established in 2011, located in Liaocheng City, Shandong Province
It is one of the largest manufacturers of carbon steel and alloy seamless steel pipes in Shandong Province, China.
Kehuan has four advanced hot rolling production lines Eight expansion production lines and China’s most advanced heat treatment production line.

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What is Welded Pipe?

Welded Pipe is a type of steel pipe formed by joining steel plates or strips through a welding process. Unlike seamless pipes, welded pipes feature a visible weld seam, which is created using techniques such as electric resistance welding (ERW), submerged arc welding (SAW), or induction welding. This manufacturing method allows for greater flexibility in producing pipes of various diameters, wall thicknesses, and lengths, making them widely used in applications ranging from construction and water supply systems to mechanical structures and industrial pipelines.

Manufacturing Process of Welded Pipe

1. Plate/Strip Preparation:High-quality steel plates or strips are selected and cut to the desired width. The edges are often pre-processed (e.g., deburring or beveling) to ensure proper alignment and welding quality.
2. Forming:The steel plate/strip is shaped into a cylindrical form through rolling or bending. For circular pipes, this involves feeding the material through a series of rolls that gradually curve it into a tubular shape. The edges are aligned to form a longitudinal seam.
3. Сварка:The aligned edges are welded together using one of several methods:Electric Resistance Welding (ERW)—— Heat is generated via electrical resistance at the seam, which is then pressed together to form a solid bond.Submerged Arc Welding (SAW):——A continuous wire electrode and granular flux are used to create a molten weld pool, resulting in a strong, durable seam.Induction Welding—— High-frequency induction heating melts the edges of the steel strip, which are then welded under pressure.
4. Sizing and Straightening:After welding, the pipe is passed through sizing rolls to ensure accurate dimensional compliance (e.g., outer diameter and wall thickness). It is then straightened to eliminate any curvature or deformations introduced during the manufacturing process.
5. Post-Weld Treatment (Optional):Depending on the application, the pipe may undergo additional processes:Термообработка—— To improve mechanical properties (e.g., hardness, ductility) or relieve internal stresses.Отделка поверхности:——Painting, galvanizing, or coating to enhance corrosion resistance.Non-Destructive Testing (NDT):——Methods like ultrasonic or radiographic testing to inspect weld integrity.

Advantages of Welded Pipe

1. Cost-Effective Production:Welded pipes are generally more economical to produce than seamless pipes, as they use flat steel stock and simpler forming processes, reducing material waste and manufacturing time.
2. Design Flexibility:Easily adapted to produce large-diameter pipes or non-standard sizes.Can be manufactured as circular, square, rectangular, or other special profiles.
3. Wide Application Range:Used for structural supports, scaffolding, and building frameworks.Water, gas, and sewage pipelines.Components in automotive, agricultural, and manufacturing equipment.Low-to-medium pressure pipelines in oil, gas, and power industries.
4. Reliable Weld Integrity:Modern welding technologies ensure strong, leak-resistant seams. Properly executed welds can match the mechanical properties of the base metal, making welded pipes suitable for many high-integrity applications when engineered and tested appropriately.

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At Kehuan, we implement change management strategies specifically tailored to the steel industry, seamlessly integrated into our operations. Our approach not only enhances immediate client benefits but also lays the groundwork for enduring advantages within your existing steel product portfolio.Convenient Online

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