Nowadays, hot -dip galvanized steel pipes are common types of fire management, and they have fully exerted irreplaceable effects in the fire safety industry. Why can't the hot -dip galvanized pipe be replaced by cheaper welded pipes or cold galvanized pipes?

The creation of hot -dip galvanized creation in the middle of the 18th century was made up of the development trend of thermal electrical tinage processing process, with a historical time of 300 years. To this day, hot -dip galvanized is still a widely used and effective processing process countermeasure in steel corrosion.

Generally, welded pipes are used to transport low -voltage flow. Made with Q195A, Q215A, Q235A steel. It can also be made of other soft steels that are easy to weld. Steel pipes should conduct experiments such as water pressure, bending, and flattening, and have certain requirements for the surface quality. Usually the delivery length is 4-10m, and the fixed ruler (or multiple ruler) is often required. The specifications of the welded pipe are different from the nominal caliber (millimeter or inch). The nominal diameter is different from the actual. The welded pipe has two types: ordinary steel pipes and thick steel pipes according to the specified wall thickness.

In order to improve the corrosion resistance of the steel pipe, the general steel pipe (black pipe) is galvanized. Galvanized steel pipes are divided into two types: hot galvanized and electro -steel zinc.

The specifications are used in the form of seamless pipes, and welded steel pipes represented by outer diameter*wall thickness millimeters are welded with ordinary carbon steel, high -quality carbon steel or universal low -alloy steel, or welded with tropical welding. Cold dialing method. Public welded pipes are divided into universal energy and thin walls, ordinary use as structural parts, such as transmission shafts, or conveying fluids, and thin walls to produce furniture, lamps, etc., to ensure the strength and bending test of the steel pipe.

Because of the same reason, the coating of the hot galvanized pipe is closely coated. The adhesion of the galvanized layer is better than the cold -dip galvanized pipe. The high adhesion means that the galvanized layer is not easy to be destroyed due to the impact friction during the entire transportation process. Essence

The hot -dip galvanized steel pipe is soaked in a galvanized pipe in the galvanized pool when it is produced. Therefore, all exposed inner and outer surfaces can be galvanized. Cold galvanized steel pipes usually choose a whole piece of zinc when making. The thick steel plate roll is welded and welded, and there is no protection of the galvanized layer at the welded seam of the tube. So everyone will choose a more secure and durable hot -dip galvanized steel pipe.