Production process of stainless steel welded pipe

Stainless steel welded pipe manufacturer steel plate ultrasonic flaw detection: After the steel plate used to make large-diameter self-submerged arc welded steel pipe enters the production line, the whole plate is firstly inspected by ultrasonic inspection; both sides of the steel plate are milled: the two edges of the steel plate are milled on both sides by the edge milling machine , so that it reaches the required plate width, plate edge parallelism and groove shape.

Internal welding of stainless steel straight seam steel pipe: use tandem multi-wire submerged arc welding (up to four wires) to weld on the inside of stainless steel straight seam steel pipe; external welding of stainless steel straight seam steel pipe: use tandem multi-wire submerged arc welding on the stainless steel straight seam The outer side of the submerged arc welded steel pipe is welded; the internal and external welds of the stainless steel straight seam welded steel pipe and the base metal on both sides of the weld are 100% inspected; the internal and external welds are 100% inspected by X-ray industrial television. Image processing system to ensure the sensitivity of flaw detection.

Stainless steel stainless steel welded pipe manufacturers stainless steel straight seam steel pipe diameter expansion: expand the full length of the submerged arc welded stainless steel straight seam steel pipe to improve the dimensional accuracy of the steel pipe and improve the distribution of internal stress in the steel pipe; The steel pipes are inspected one by one to ensure that the steel pipes meet the test pressure required by the standard. The machine has the functions of automatic recording and storage.
Stainless steel stainless steel welded pipe chamfering: process the pipe end of the qualified steel pipe to reach the required pipe end bevel size; conduct ultrasonic inspection one by one again to check the defects that may occur after the diameter of the stainless steel straight seam welded steel pipe is enlarged and the water pressure is applied ; Carry out X-ray industrial television inspection and filming of pipe end welds on steel pipes after diameter expansion and hydrostatic testing.