First, the production process of demagnetized galvanized steel pipes, non-magnetic stainless steel pipes, and non-magnetic galvanized steel pipes:
Non-magnetic galvanized steel pipes are non-magnetic galvanized steel pipes. Its production process is to bend the strip steel or coil into a spiral shape, and use double-sided submerged arc automatic welding to weld the inner and outer seams to make a galvanized steel pipe, and then remove its magnetism through high temperature, electromagnetic field induction, pulse current and other processes, to achieve a weak magnetic and non-magnetic state; non-magnetic galvanized steel pipe is a Steel pipe with good corrosion resistance and wear resistance, coupled with their non-magnetic characteristics, are widely used in rail transit, subway construction, high-speed rail pre-buried electrical piping, civil air defense construction, and other industries; non-magnetic galvanized steel pipe is a demagnetized galvanized steel pipe, so the construction of cable threading can effectively avoid signal interference and keep the communication signal smooth.
Second, the advantages and characteristics of demagnetized galvanized steel pipes, non-magnetic stainless steel pipes, and non-magnetic galvanized steel pipes:
1. Non-magnetic galvanized steel pipes have the advantages of uniform coating, strong adhesion, and long service life. The non-magnetic galvanized steel pipe matrix undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.
2. As long as the forming angle is changed, non-magnetic galvanized steel pipes of various calibers can be produced with the same width of strip steel, which is easy to adjust.
3. Because it is formed by continuous bending, the fixed length of non-magnetic galvanized steel pipe is not limited and the length can be set at will.
4. The weld is spirally evenly distributed on the entire circumference of the non-magnetic galvanized steel pipe, so the dimensional accuracy of the demagnetized galvanized steel pipe is high and the strength is also strong.
5. It is easy to change the size and is suitable for the production of small batches and multiple varieties of non-magnetic galvanized steel pipes. The weld of the galvanized steel pipe is longer than the weld of the straight seam steel pipe of the same specification. Under the same specification wall thickness, the hot-dip galvanized steel pipe bears the greatest pressure.
6. The non-magnetic galvanized steel pipe has a hot-dip or electroplated zinc layer on the surface of the welded steel pipe. The galvanized zinc layer can increase the corrosion resistance of the non-magnetic steel pipe and extend its service life.
The defect of the weld of the demagnetized galvanized steel pipe, non-magnetic stainless steel pipe, and non-magnetic galvanized steel pipe is an “oblique defect”. During use, the equivalent defect length in the principal stress direction of the steel pipe, that is, the axial direction of the galvanized demagnetized steel pipe, is smaller than that of the straight seam steel pipe; secondly, since pipeline steels are all rolled steel plates, the impact toughness has a large anisotropy, and the CVN value along the rolling direction can be 3 times higher than the CVN value perpendicular to the rolling direction.
Post time: May-30-2025