Lh2000 Spiral Welded Steel Pipe Making Machine

Nine main technological processes of helical welded pipe unit LH-2000:

Step 1, the weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, the amount of wrong side and the weld gap are strictly controlled.

Single wire or double wire submerged arc welding is carried out by welding machine Step 2, inside and outside welding, so as to obtain stable welding specifications.

Step 3, the weld after welding are inspected by the online continuous ultrasonic automatic injury instrument, to ensure 100% of the spiral weld non-destructive testing coverage. If there are defects, automatic alarm and spraying mark, production workers at any time to adjust the process parameters, timely elimination of defects.

Step 4, the air plasma cutting machine will be used to cut the welded pipe into a single.

Step 5, after cutting into a single welded pipe, each batch of welded pipe head three to carry out a strict inspection system, check the mechanical properties of the weld, chemical composition, melting condition, surface quality of the welded pipe and through non-destructive inspection, to ensure that the pipe making process qualified, before formally put into production.

Step 6: The parts with continuous sonic inspection marks on the weld shall be reviewed by manual ultrasonic and X-ray. If there are defects, they shall be nondestructive tested again after repair until it is confirmed that the defects have been eliminated.

Step 7: The butt welding weld of strip steel and the pipe where the T-joint intersects with the spiral weld are all inspected by X-ray TV or film.

Step 8, each welded pipe through hydrostatic test, pressure using radial seal. The test pressure and time are strictly controlled by the welding pipe water pressure microcomputer testing device. Test parameters are automatically printed and recorded.

Step 9, pipe end machining, so that the end face perpendicularity, groove Angle and blunt edge can be accurately controlled.

Hebei Yongyue Electromechanical Equipment Co., Ltd. is a professional high-end cold-bending equipment manufacturer with an annual output of 100 sets of equipment, integrating independent research , production, development, sales and service.