Fire-fighting pipes are usually hot-dip galvanized pipes, but they are also galvanized pipes. Why don’t you choose pre-galvanized pipes with low prices?
Hot-dip galvanized pipe was invented in the middle and late 18th century. It was developed from the hot-dip tinning process and has a history of more than 300 years. To this day, hot-dip galvanized pipe is still the most widely used and traditional production process in the anti-corrosion method of stainless steel sheets.
The basic concept of hot-dip galvanized pipe maintenance stainless steel sheet is: in addition to forming a layer of outer covering to block the damage of gas and moisture to the seamless steel pipe, the electronegativity of iron used is higher than that of zinc. Diazotization hot-dip galvanized layer, abandoning the zinc layer to protect the stainless steel plate inside. Therefore, the corrosion resistance of ordinary welded steel pipes cannot be achieved. Even for stainless steel plates that have been corrosion-resistant by painting and other corrosion-resistant methods, the corrosion resistance cannot be compared with that of hot-dip galvanized pipes.
The hot-dip galvanized layer of the hot-dip galvanized pipe is the shell that covers the surface of the seamless steel pipe after soaking, while the cold-dip galvanized pipe is a layer of plastic film, so the thin-walled level of the hot-dip galvanized layer of the hot-dip galvanized steel pipe is much higher than that of the seamless steel pipe. Cold galvanized pipe. We can be familiar with the basic concept of hot-dip galvanizing and maintenance of stainless steel sheets. The thicker the hot-dip galvanizing layer, the greater the zinc, the better the maintenance effect on stainless steel sheets. Therefore, the thickness of the hot-dip galvanized layer is much lower than that of the opposite hot-dip galvanized steel pipe, and the corrosion resistance is dozens of times that of the cold-dip galvanized steel pipe. Therefore, even if the price of hot-dip galvanized pipe is a little higher than that of cold-dip galvanized pipe, hot-dip galvanized pipe is still more popular.
It is also for the same reason that the coating of the hot-dip galvanized pipe is tight, and the adhesion of the hot-dip galvanized layer is better than that of the cold-dip galvanized pipe. The high adhesion means that the hot-dip galvanized layer is not easy to be damaged due to collisions during transportation. damage. When the hot-dip galvanized pipe is manufactured, the whole pipe is soaked into the hot-dip galvanizing pool and hot-dip galvanized, so as long as the exposed inner and outer layers can be inlaid with zinc, and the cold-dip galvanized steel pipe is usually galvanized by the pipe during manufacture. The exposed zinc is rolled and welded, and there is no maintenance of the hot-dip galvanized layer at the welded part of the pipe. Therefore, in order to ensure a more efficient fire pipe, everyone will choose a stronger and more durable hot-dip galvanized pipe. And the price of hot-dip galvanized pipe is affected by the region and quantity. Usually, the price of hot-dip galvanized pipe is about 4000.