Pipe welding is a method for connecting two pipes together. Some make a distinction between pipe welding and pipeline welding, with pipe welding relating to metal pipes at plants and refineries and pipeline welding referring to those used to transport gas, water, oil and other liquids over many miles.

For thousands of years, People have been utilizing and producing pipes for different purposes. It is confirmed that in 2000 BC ancient times, agriculturists or Chinese people have utilized pipes made from different materials like wood or bamboo, for water transportation. Since the 1800s, great progress have been accomplished in the technology of steel pipes, including improving manufacturing methods, developing applications for their use.

There are two section types of the pre-galvanized hollow pipes,the square hollow pipe and rectangular pipe. The size of the hollow pipe can reach 12x12-500mm, and the thickness of the pipe can reach 0.6-20mm. The material grade can reach Q195-Q235. The hollow pipes are bundle with steel strips. And

The galvanized pipes are widely used in oil transportation and construction，such as steel structure, buildings, guard rails, fences, metal furnitures and etc. Due to its zinc coated surface,the galvanized pipes are anti-corrosion. Here are 2 types of galvanizing: hot dip galvanizing and pre-galvanizing. Based on the enviroment of the product needs, you can choose your fittable product.