Production Process
(1) The raw materials are steel rolls, welded wires, and solder. Strict physical and chemical tests must be passed before the investment.
(2) Bring steel head and tail docking, single -silk or double -wire buried arc welding, and use automatic buried arc welding to replenish welding after being rolled into a steel pipe.
(3) Before forming, the tissue is clear, cut, and planed, and the surface is cleaned and transported on the surface.
(4) Use the electric connection point pressure gauge to control the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transportation of the steel.
(5) Use external or internal control rollers.
(6) The weld gap control device is used to ensure that the weld gap meets the welding requirements. The pipe diameter, the error edge amount and the weld gap are strictly controlled.
(7) Internal welding and external welding are welded with single -silk or double wire buried arcs to obtain stable welding quality
(8) The welded welds are checked by continuous ultrasonic automatic injury in the online continuous ultrasonic injuries, ensuring that 100%of the spiral welded seams are not damaged detection coverage. If there are defects, automatically call the police and spray the mark, the production workers adjust the process parameters at any time to eliminate the defects in time.
(9) Cut the steel pipe into a single root with air plasma cutting machine.
(10) After cutting into a single steel pipe, each batch of steel pipes must carry out a strict first inspection system to check the mechanical properties, chemical components, dissolved conditions, the surface quality of the steel pipe, and the inspection of the steel pipes. Then it can be officially put into production.
(11) There are parts of continuous sound wave probe marks on the weld. After manual ultrasonic and X -ray reviews, if there are defects, after repair, it is not tested again until it is confirmed that the defect has been eliminated.
(12) The tube of the tube of the diced joints intersecting the welded weld and intersecting the spiral welding seams is checked by the X -ray TV or filming.
(13) Each steel pipe is tested by static water pressure, and the pressure is sealing by radial seal. The test pressure and time are strictly controlled by the steel pipe hydraulic microcomputer detection device. The test parameter is automatically printed.
(14) Machining the tube end, so that the end surface is vertical, and the horn and blunt edges are accurately controlled.
Craftsmanship
a. During the molding process, the steel plate is uniform, the residual stress is small, and the surface is not scratched. The processing spiral steel pipes have greater flexibility in the size of the diameter and thickness of the wall, especially in the production of high -steel thick wall pipes, especially the small and medium -caliber thick wall tubes, which have other technologies that cannot be compared with the advantages, which can meet users. More requirements for the specifications of spiral steel pipes.
b. Adopting advanced double -sided buried arc welding processes can achieve welding in the location. It is not easy to cause defects such as wrong edges, welding bias and unproof thoroughs, and easy to control welding quality.
c. Perform 100%quality inspection of the steel pipe, so that the entire process of steel pipe production is effectively inspected and monitored, and the product quality is effectively guaranteed.
d. All the equipment of the entire production line has the functions of connected to the computer data collection system to realize the real -time data transmission. The central control room has the technical parameters in the production process.
