Mechanical rolling method, explosive compounding method, drawing compounding method, hydraulic compounding method.
mechanical spinning
Formation mechanism:
The mechanical properties of two different materials are utilized, that is, the elastic deformation range of the outer base pipe (carbon steel pipe) and the low yield strength of the inner lining pipe (stainless steel pipe). Under the extrusion of the screw feed of the rolling machine, the inner lining pipe is continuously and locally deformed plastically, and the outer base pipe is always kept within the elastic deformation range. When the external force is removed, the outer base tube elastically shrinks, and the inner liner tube cannot shrink due to its plastic deformation. Thereby, the outer surface of the inner lining pipe is strongly embedded in the inner surface of the outer base pipe, and the composite molding is achieved.
Features:
1. Good corrosion resistance: it can effectively prevent secondary pollution and meet the requirements of the national direct drinking water quality standard;
2. High strength: It has strong anti-extrusion and anti-resonance properties, which greatly reduces the possibility of leakage of water pipes due to external impact, and avoids a lot of waste of water resources due to leakage;
3. Good stability: the thermal expansion coefficient is almost the same at -20~350℃ (small thermal expansion coefficient and high heat resistance);
4. The pipe wall is smooth and uniform, without scaling, the diameter is guaranteed, and the conveying energy consumption is low;
5. The traditional process connection is adopted, which is safe, flexible and reliable;
6. Reduce thermal energy loss, the thermal insulation performance of stainless steel pipe is 24 times that of copper material water pipe, which greatly saves thermal energy loss in hot water transportation;
7. Excellent cost performance: the total cost is only two-thirds of the price of thin-walled stainless steel pipes and one-fifth of the price of red copper pipes.
technical parameter:
Base pipe type: galvanized steel pipe, food grade 304 stainless steel pipe
Compound pressure: the bonding strength is higher than the 0.2MPa required by the industry standard
Execution standard: the operating pressure conforms to the provisions of GB/T8163-2008 and GB/T3091-2008
Connection Type: Threaded, Grooved, Welded and Flanged
Representative manufacturers:
explosive recombination
Formation mechanism:
The assembled inner and outer pipes are placed in the water tank, and the cluster explosive is placed on the axis of the inner lining pipe. The instantaneously produced explosive force of the explosive causes the water pressure in the water tank to increase instantaneously, and the instantaneously increased water pressure pushes the lining in an instant. The tube expands outward in the diameter direction. Under the action of water pressure, the expanding liner tube expands on the inner surface of the outer base tube, and under the action of water pressure, it continues to expand with the outer base tube until the pressure disappears. ; And the outer base tube shrinks inward in the axial direction, and finally forms the composite.
Features:
① One-time instant forming.
② The pressure at each point is basically the same.
