Hot-dip galvanized steel pipe is a square pipe formed by a series of chemical reactions in the hot-dip galvanizing pool, which is welded by steel plate or crimping. The performance and acceptance criteria of hot-dip galvanized steel pipes are as follows:
Hot-dip galvanized steel pipe has good strength, toughness, plasticity, weldability and ductility. Its alloy layer is firmly attached to the steel base. Therefore, the hot-dip galvanized steel pipe can be formed by cold stamping, rolling, wire drawing and bending without damaging the coating.
It is suitable for general processing such as drilling, cutting, welding, cold dipping, bending and other processes. The surface of hot-dip galvanized parts is bright and beautiful, and can be directly used in engineering as required.
Hot-dip galvanized steel pipe is generally qualified by the appearance of the product. If there is leakage, pitting, white spots, heavy leather, bubbles, green, high frequency and other phenomena on the outer surface of the pipeline, it is judged as unqualified.
However, in the product standard, the product deviation has a specified range, that is, the allowable size deviation, because zinc hardly changes in dry air, so if we coat zinc on the surface of the steel pipe, we can prevent the steel pipe from being corroded.
Smooth appearance, no zinc tumor, no burr, silvery white color, controllable thickness, optional range of 5~107um, no hydrogen embrittlement, no temperature hazard, and can meet various requirements of users. Ensure that the mechanical properties of the material remain unchanged; it can replace some hot-dip galvanizing processes with good corrosion resistance.