Welded Steel Pipe Production: The Role of Welding Preheating

For welded steel pipe production, the technique means that heating the whole of the weldment or local welding area before welding is known as preheating. For those welds with higher weld strength, hardening tendency, particularly good heat-conducting property and big thickness, and when the environment temperature of welding zone is too low, it is necessary to preheating the weldment before welding. The main purpose of preheating is reducing the cooling rate and preheat temperature of welded joint. Preheating can reduce cooling rate but basically has impact on time of staying in high temperature, that is so prefect. So when welding the steel with hardening tendency, the main processing measure to reduce cooling rate and decrease hardening tendency is preheating, rather than increase the heat input.



About Hunan Prime Steel Pipe Co., Ltd

HUNAN PRIME STEEL PIPE is the export gateway of SHINESTAR HOLDINGS GROUP. We are dedicated in providing and exporting high performance-price ratio welded & seamless steel pipes and fittings covering various steel grades. At Prime Steel Pipe, we believe that honest communication, expertise in our industry, and prompt execution lead to strong long-term relationships. Our professioanl team provides " one-stop procurement" servics to coordinate with your project regulation, site and terrain, and ensure the best quality of products by assigning skillful experts at every stage of production. Our principles is to keep the honesty in mind, to win reputation by trust. We strives to providing quality products, competitive price and value-added services to our clients throughout the world.

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