Production process of stainless steel welded pipe

Ultrasonic inspection of stainless steel welding tube factory steel plate: used to make the steel plate of the open-mouth submerged arc welded steel pipe into the production line, the first all-plate ultrasonic inspection;Milling on both sides of steel plate: milling on both sides of the steel plate through the milling machine, so that they reach the required width, parallelism of the plate side and groove shape.

Inner welding of stainless steel straight seam steel tube: vertical multi-wire submerged arc welding (up to four wires) is adopted to weld inside the stainless steel straight seam steel tube;External welding of stainless steel pipe with straight seam: vertical multi-wire submerged arc welding is adopted to weld the outside of stainless steel pipe with straight seam submerged arc welding.Conduct 100 percent review of the inner and outer welds of stainless steel straight welded steel tube and the base material on both sides of the weld;A 100 % X-ray industrial TELEVISION review of the welds was carried out, and the image processing system was selected to ensure the flexibility of the flaw detection.

Stainless steel welded pipe manufacturer Stainless steel straight seam steel pipe expanding: expand the whole length of submerged arc welded stainless steel straight seam steel pipe to advance the dimension accuracy of steel pipe, and improve the distribution shape of internal stress of steel pipe; check the expanded steel pipe one by one on the hydrostatic testing machine to ensure that the steel pipe reaches the test pressure required by the standard, the machine has the function of automatic recording and storage.

Chamfering of stainless steel welded pipe: process the pipe end after passing the inspection to reach the required pipe end groove size; conduct ultrasonic inspection one by one again to review the defects of stainless steel straight seam welded pipe that can occur after expanding and water pressure; conduct X-ray industrial television review and pipe end weld photography on the steel pipe after expanding and water pressure test.