Galvanized welded pipe is a type of steel pipe manufactured through a welding process. It uses steel strips or plates as raw materials and is welded into shape using methods such as furnace welding or electric welding to form a black pipe (i.e., ungalvanized steel pipe). Subsequently, a zinc layer is coated on the pipe wall surface through hot-dip galvanizing or electro-galvanizing (cold galvanizing) processes. Hot-dip galvanizing has become the mainstream application due to its thicker zinc layer and better corrosion resistance. Its main classification is based on the different galvanizing methods, divided into hot-dip galvanized welded pipe and cold-dip galvanized welded pipe (electro-galvanized welded pipe), with hot-dip galvanized welded pipe being widely used due to its superior performance.

Galvanized seamless steel pipe is a corrosion-resistant steel pipe made by using seamless steel pipe as the base material and forming a zinc layer on its surface through a hot-dip galvanizing process.
This process involves pickling the steel pipe to remove surface oxides, followed by immersion in molten zinc, allowing the substrate and coating to bond and form a zinc-iron alloy layer, thereby significantly improving corrosion resistance.

Galvanized square pipe is a hollow square cross-section steel pipe with a square cross-section shape and size made from hot-rolled or cold-rolled galvanized strip steel or galvanized coil plate, which is formed by cold bending and then high-frequency welding. , or galvanized square rectangular pipes made by hot-dip galvanizing the pre-made cold-formed hollow steel pipes.

Galvanized rectangular tubes are hollow, long steel strips with a rectangular cross-section. They belong to the category of cold-formed hollow steel sections and are classified into two types based on the galvanizing method: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing involves a high-temperature zinc layer, providing strong corrosion resistance and making it suitable for outdoor applications. Electro-galvanizing has a smooth surface but weaker corrosion resistance and is mostly used for indoor applications.

Galvanized steel pipe is a welded steel pipe with a hot-dip or electroplated galvanized layer on its surface. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipes have a wide range of applications. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially in marine oil fields. They are also used as pipes for oil heaters, condensers, and coal tar wash oil exchangers in chemical coking equipment, as well as pipes for support structures in wharf piles and mining tunnels.

Galvanized steel pipe is a welded steel pipe with a hot-dip or electroplated galvanized layer on its surface. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipes have a wide range of applications. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially in marine oil fields. They are also used as pipes for oil heaters, condensers, and coal tar wash oil exchangers in chemical coking equipment, as well as pipes for support structures in wharf piles and mining tunnels.