Overview
Square and rectangular welded steel tubes are hollow structural sections (HSS) produced by forming and welding steel coils or plates. Their standardized shapes and consistent quality make them ideal for modular construction and machinery. These tubes are classified by edge type (e.g., rounded or sharp corners) and manufacturing methods, such as ERW or cold-formed welding. They comply with international standards like ASTM A500, EN 10219, or JIS G3463, ensuring reliability for structural applications.
Structure and Working Principle
The tubes are fabricated by passing steel strips through rollers to form the desired cross-section, followed by high-frequency welding to fuse the edges. Post-weld processes include sizing, straightening, and cutting to length. Their structural efficiency comes from the uniform distribution of material around the perimeter, providing high torsional resistance and load capacity. Unlike seamless tubes, welded variants offer cost advantages for large-scale projects without compromising performance in non-critical pressure applications.
Key Features
Dimensional accuracy (±0.5 mm tolerance) allows for tight-fit assemblies in frameworks. The smooth surface finish facilitates painting or powder coating for aesthetics and corrosion protection. Variants include hot-dip galvanized tubes for outdoor use and pre-painted options for architectural projects. Custom perforations or notches can be added for specific functional requirements.
Application Areas
Construction: Used in building frames, roof trusses, and scaffolding due to their lightweight yet sturdy nature. Industrial: Conveyor systems, agricultural equipment, and storage racks rely on these tubes for durability. They are also common in automotive chassis and furniture manufacturing.
Maintenance and Precautions
Regular inspections for rust or weld cracks are recommended, especially in humid environments. Avoid abrasive cleaning methods that may damage protective coatings. For load-bearing applications, ensure the tube’s wall thickness and steel grade match the design specifications. Overloading can lead to buckling or deformation.
B2B Procurement Guide
Verify supplier certifications (e.g., ISO 9001) and request mill test reports for material properties. Bulk orders (20+ metric tons) often qualify for discounts. Lead times typically range from 2–6 weeks, depending on customization. For international shipments, confirm packaging standards to prevent transit damage.
Related Manufacturers
- 主营：花纹钢板、热轧碳钢板
- 主营：钢管桩、冷轧卷、优碳钢、矩形钢管、酸洗钢板、热轧钢板、结构钢板、热平直板、黄铜闸阀、锅炉钢板、高强钢板、空调支架、冲压卷料、酸洗卷板、冷轧薄板、热轧角钢、等边角钢、工字型钢、普碳板卷、镀锌c型槽、花纹钢板材、酸洗平直板、不锈钢管、不锈钢板、阀门
- 主营：彩钢板、中厚板、彩钢卷、Q355B高频直缝焊管、造船板、彩涂卷、桥梁钢板、彩涂钢板、船用钢板、锅炉容器板、拉森钢板桩、彩钢压型板、压力容器板
- 主营：镀锌方矩管、方矩管、焊管、镀锌钢管、热浸锌钢管
- 主营：方矩管、无缝方管、镀锌方管、Q345B方管、Q355D矩形管、热轧方矩管、Q355E方管厂家
- 主营：镀锌管、镀锌无缝管、无缝管、镀锌方管、方管、焊管、螺旋管、衬塑管、涂塑管、不锈钢管、工角槽
- 主营：螺旋管、球墨铸铁管、螺旋钢管、焊管、钢花管、声测管、钢材、涂塑无缝钢管、防腐无缝钢管、镀锌钢管、新兴铸管、聚氨酯保温管道、精密钢管、波纹管、大口径直缝钢管、球墨管、钢护筒、钢铁、内外涂塑钢管、灌注桩声测管、防腐钢管、镀锌管、57声测管、热镀锌钢管、钢塑复合管
- 主营：螺旋钢管、无缝钢管、防腐钢管、焊管、保温钢管、无缝管、钢管、钢丝网骨架管、PE给水管、污水处理钢管、镀锌钢管、镀锌管、波纹管、闸阀、阀门、蝶阀、水力控制阀、球阀、过滤器、止回阀、截止阀、大棚管
- 主营：无缝钢管、不锈钢板、镀锌钢管、方管、铅板、铅门、不锈钢管、不锈钢花纹板、高压锅炉管、合金钢管
- 主营：正大焊管、钢塑复合管、衬塑镀锌钢管
- 主营：无缝管、聚氨酯无缝保温管、螺旋管、方管、焊管、衬塑管、角钢、槽钢
- 主营：H型钢、C型钢、热镀锌角钢、空心焊管、不锈钢焊管、镀锌方管、槽钢、镀锌钢管、聚氨酯保温钢管、P塑料管帽、不锈钢管、镀锌无缝钢管、电缆保护管、螺纹法兰盖、球墨铸铁圆井篦子、盘螺线材、涂塑防腐钢管、螺旋管、碳钢圆管、衬塑钢管、精轧螺纹钢、玻璃钢防腐保温管、法兰弯头三通、排污供水管、彩钢围挡
- 主营：镀锌管、镀锌板、冷板、镀锌方管、焊管、方管、热轧板、中板、角钢、槽钢、工字钢、H型钢、无缝管、酸洗板、冷轧板、开平板
- 主营：无缝钢管、高压锅炉管、精密光亮管、无缝方矩管、酸洗钝化加工、螺旋管、厚壁卷管
- 主营：工字钢、角钢、槽钢、镀锌方管、热镀锌方管、直缝焊管、无缝方管、无缝方矩管、镀锌钢管、镀锌管、热镀锌管、无缝管、无缝钢管、螺旋钢管、钢花管、注浆管、精密管、精密钢管、合金管、合金无缝管、高压锅炉管
- 主营：法兰、弯头、封头、镀锌焊管、三通、衬四氟管、弯管、大小头、管件、支吊架、保温钢管、防腐钢管、涂塑钢管、无缝管、直缝管、镀锌管、不锈钢管、人孔、阀门、钢管、管道、螺旋管、玛钢件、承插件、瓦斯管、衬塑钢管
- 主营：镀锌板、镀锌瓦楞板、镀锌打包带、方管、焊管、铝方管、不锈钢带、不锈钢瓦楞板、保温铝板、冷轧板、导电铝排、铝管、彩钢板、镀锌管、铝棒、铜排、角铝、钢板切割、配重铅块 铅粒、铅管、铅板、铝板、锌铝镁
- 主营：钢结构设计加工安装、镀锌钢管、镀锌zc型钢檩条、方管、焊管、螺旋钢管、激光切割焊接加工、不锈钢、工字钢角钢槽钢H型钢、预应力金属波纹管、无缝钢管、钢板
- 主营：定尺管、螺旋管、螺旋焊钢管、方矩管、方矩焊管、高频焊管、焊管定尺、热镀锌方矩管、热镀锌方钢、燃气专用管、埋弧焊钢管、热镀锌圆管、钢塑复合管、镀锌管、热镀锌冷弯、输送焊接钢管、焊接镀锌钢管、热镀锌管、热镀圆管、焊接钢管、衬塑管、衬塑冷水管、热镀锌燃气专用管、热镀锌穿线管、热镀锌钢管
- 主营：高压无缝钢管、精密钢管、高压锅炉管、方管、直缝埋弧焊管、管线钢管、冷拔无缝钢管、非标钢管、厚壁钢管、P91 P92合金管、美标无缝钢管、锅炉管、高温合金钢管、高温钢管、低温无缝钢管、石油裂化管、美标低温管、高压化肥管、厚壁无缝钢管、精轧退火钢管、小口径冷拔管、化工管道、石油燃气管道、热镀锌钢管、架子钢管