Notes of seamless steel tube equipment when making

a. Oiling and marking: The steel pipe qualified by the hydrostatic testing machine is oiled to prevent corrosion, and marking is performed according to the user's requirements.

b. Straightening milling: The original curled steel plate is flattened by an anvil press, and then the two edges of the steel plate are double-faced by a milling machine to achieve the required plate width, plate edge parallelism, and groove shape.

c. Shear forming: In the production line, the steel plate is spirally curled into a tube along the outer edge.

d. Butt welding: The seamless steel tube equipment market adopts advanced double-sided submerged arc welding technology for pre-welding, internal welding and external welding. The welded steel pipe was cut to a gauge length using a plasma ruler.

e. Visual inspection: Professional technicians check some basic parameters.

f. Ultrasonic flaw detection: The development of scrap steel will perform 100% inspection of the internal and external welds and the base metal on both sides of the weld.

g. X-ray inspection: 100% X-ray industrial television inspection of internal and external welds, using image processing systems to ensure flaw detection sensitivity.

h. Pressure test: The steel pipe is tested one by one on a hydrostatic tester to ensure that the pipe meets the required test pressure.

i. Chamfered flat head: The seamless steel tube equipment will carry out tube end processing after passing the inspection, and reach the required tube end (spiral welded tube unit) groove size.

j. Final inspection: The leveler is again subjected to ultrasonic and X-ray inspections and pipe end magnetic particle inspections to check for weld problems and pipe end defects.

k. Unrolling plate survey: After uncoiling the steel plate into the production line, first conduct a full-plate ultrasonic inspection.