... clamping parts (for caterpillars) and related guiding plates,DN15,20,25,32,40,50,65,80,100,125,150,200,250 ... ). Welding pipe diameter: 8~150mm 2). Thickness: 0.20~1.2mm 3). Speed: 1.5~3m/min 4). Accessories welding unit ... welding pipe outer diameter: 150-350mm 2). Thickness: 0.25~1.2mm 3). Speed: 0.8~2.0m/min 4). Accessories welding ...