Chongqing Renbang Company solemnly promises, at equal quality, to offer low prices, excellent service, and high credibility to thank both new and old customers for their support and affection. Meeting customer needs is always our pursuit. Our company will strive to build a stainless steel material processing and procurement platform, becoming your reliable and enduring partner.
Welded steel pipes, also known as ERW pipes, are steel pipes made by welding steel plates or strips after rolling and forming, typically cut to 6 meters in length. The production process for welded steel pipes is simple, with high efficiency, a wide variety of specifications, and minimal equipment investment. However, they generally have lower strength compared to seamless steel pipes.
Welded Tube Categories:
1. Categorized by production method: By process - Arc Welded Pipe, Resistance Welded Pipe (Low Frequency), Gas Welded Pipe, Furnace Welded Pipe. By weld seam - Seamless Pipe, Spiral Welded Pipe.
2. Categorized by cross-sectional shape: Simple cross-section steel pipes - Round steel pipes, Square steel pipes, Elliptical steel pipes, Triangular steel pipes, Hexagonal steel pipes, Rhombus steel pipes, Octagonal steel pipes, Semi-circular steel pipes, Others. Complex cross-section steel pipes - Unequal hexagonal steel pipes, Five-petaled plum blossom steel pipes, Double-convex steel pipes, Double-concave steel pipes, Walnut-shaped steel pipes, Conical steel pipes, Wavy steel pipes, Shell-shaped steel pipes, Others.
3. By wall thickness classification: Thin-walled steel pipes, thick-walled steel pipes.
4. Categorized by end shape: round welded pipes and non-standard (square, flat, etc.) welded pipes.
Welded pipe production process:
Raw material unrolling – leveling – end cutting and welding – sleeve fitting – forming – welding – removal of inner and outer beads – pre-alignment – induction heat treatment – sizing and straightening – eddy current testing – cutting – hydrostatic testing – pickling – final inspection (rigorous quality control) – packaging – shipment.
Since the 1930s, with the rapid development of continuous steel strip rolling and advancements in welding and inspection technologies, the quality of welds has continually improved. The variety and specifications of焊接钢管(welded steel pipes) have expanded, increasingly replacing seamless steel pipes in more and more fields. Welded steel pipes are categorized by the weld type into straight seam and spiral seam pipes. By production method, they are classified into: process type - arc weld pipes, resistance weld pipes, (low-frequency) gas weld pipes, and furnace weld pipes.
Our company always adheres to the philosophy of "Integrity First, Quality Supreme" and promotes the healthy development of the industry. Based on the concept of mutual benefit and cooperation, we are eager to join hands with both new and old friends to strive for a brighter future together!
