When sourcing galvanized hollow sections for outdoor use, one of the most frequently asked questions is: “How long does galvanized steel last outdoors?” The answer depends on coating thickness, galvanizing method, and the environment where the steel is used. 1. What Determines the Lifespan? The lifespan of a galvanized hollow section mainly depe...

A Message to Our Valued Customers In today’s competitive market, you have a choice: partners who compete on price alone, or partners who deliver real value through technology and quality. At DPBD, we choose the latter. Recent developments in China’s steel pipe industry offer powerful lessons for all of us. While these breakthroughs i...

Square/Rectangular Tubes, Round Tubes, and Galvanized Pipes are three indispensable steel sections in steel structure industrial buildings. Due to their respective physical properties, fabrication characteristics, and cost-effectiveness, they are widely utilized in different structural components, working together to create safe, economical, and...

This is a practical and important question in the fields of construction and industry. Although they may appear similar externally, ERW Square and Rectangular Tube and seamless square/rectangular tubes have distinct differences in performance, cost, and application due to their fundamental differences in manufacturing processes. In short, the co...

Process classification Square and rectangular tubes are classified by production process into: hot rolled seamless rectangular tube, cold drawn seamless square tube, extruded seamless square tube, and welded square tube. Welded square tube is further divided into: (a) By process: arc welded square tube, resistance welded square tube (high freque...