Production line introduction: Large-Diameter Longitudinal Submerged-Arc Welded (LSAW) Pipe Production Line apply the PFP gradually forming. This production line can guarantee the product's quality, the high producting efficiency and save the investment,which is very suitable for the manufacturers. the flow: A,plate detection B,milling C,preflex D,forming E,prewelding F,inside welding G,outside welding H,ultrasonic detection I,X-ray testing J,diameter expanding K,water pressure testing L,ultrasonic detection M,X-ray testing N,chamfering O,pipe end magnetic particle inspection. P,antisepic and coating. Our company can design and manufacturesubmerged arcwelded pipe production line according to customer's requirements. The line mainly includes the following equipments:plate ultrasonic testing equipment, edge-trimming machine, forming machine,welding equipment,straightening machine, X-ray testing equipment, expanding machine, hydrotester, chamfering machine, etc.