Description

Now the big caliber welding pipe is mainly used for the onshore, ocean oil and gas, coaling slurry, mining slurry transportation. The main production mode is UOE, CFE, RBE, JCOE, C, PFP shaped step by step, but any mode it needs at least three main equipments, they are End Squaring & Tack Welding Machine, Pipe Internal SAW, Pipe External SAW. The most popular welding mode is PFP as follow: Plate ultrasonic detection→milling→pre-bending→shaping→End squaring &tack welding→pipe internal sub-arc welding→pipe external sub-arc welding→ultrasonic detection→X-radial detection→mill expanding→rounding→water pressure exam→ultrasonic detection→X line detection→crop chamfer→magnetic powder detection→Weight testing→Marking and output