... stock 5. Longer working life 1) Technique: High-frequency welded2) Grade: Q195, Q235, 08AL, 08YU, ... Welded Steel Pipes, Bright Welded Steel pipes, White Polyethene Coated Welded Steel Pipes, Chrome Coated Welded Steel Pipes, Electric-plated Welded Steel Pipes, Pre galvanized welded steel pipes8) Shapes: Square pipes, Rectangular Pipes, Oval Steel Pipe, Round Pipes, Long Ellipse Pipes, Anomalous Pipes ...