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LSAW = Longitudinal Submerged Arc Welded（直缝埋弧焊钢管） 上图展示了 LSAW 钢管的核心特征：焊缝沿管子轴向（长度方向）笔直延伸，因此也称为”直缝管”。原料为单张钢板，经压弯成型后用埋弧焊（SAW）工艺焊接纵缝。 制造工艺：两种主流成型方式 工艺 英文全称 成型步骤 特点 JCOE J-forming → C-forming → O-forming → Expanding 钢板先逐步压成 J 形→C 形→O 形圆筒→扩径定径 设备投资较低，适合中小批量、多规格；国内中小厂家常用 UOE U-forming → O-forming…

Overview Both standards are published by CEN (European Committee for Standardization) and apply to structural hollow sections — covering SHS (Square), RHS (Rectangular), and CHS (Circular Hollow Sections). The critical dividing line is how the…

SHS — Square Hollow Section SHS stands for Square Hollow Section. It is a structural steel tube with a square cross-section, meaning all four outer sides are of equal length (B = B). The…

ERW carbon steel pipes are widely used in modern industrial applications where strength, durability, and cost efficiency are important requirements. Yuntong (Tianjin) Industrial Co., Ltd. provides high-quality steel and piping solutions for…

H beam steel plays an important role in modern construction projects due to its excellent strength, structural stability, and wide range of applications. Yuntong (Tianjin) Industrial Co., Ltd. supplies high-quality steel products…

Galvanized round pipes are widely recognized for their durability, corrosion resistance, and flexible applications in different industries. Yuntong (Tianjin) Industrial Co., Ltd. provides professional steel and piping solutions for construction, manufacturing, and…

Reliable steel materials are essential for the development of construction, manufacturing, and heavy industries. Yuntong (Tianjin) Industrial Co., Ltd. provides comprehensive steel and piping solutions to meet the needs of different industrial…