SPIRAL WELDED PIPE LINE

上卷→开卷→头尾矫平→切割对焊→圆盘剪→废边卷取→

铣边机→递送机→预弯导板→成型机→内、外焊→

切断→拔出→平头倒棱→水压试验→成品收集

loading coil→uncoil→leveling→cutting and butt welding→circle shear→trimming→

edge milling→delivering →prebending→forming→interal、 external welding→cutting off→

pulling out→flat head chamfering →hydraulic testing→collection