Galvanized steel pipes are divided into cold-galvanized steel pipes and hot-dip galvanized steel pipes. Cold-galvanized steel pipes have been banned, and the latter is also recommended by the state to be temporarily used. In the 1960s and 1970s, developed countries in the world began to develop new

There are many welding methods for galvanized steel. Generally, gas welding, manual arc welding, CO2 gas shielded welding, automatic submerged arc welding, and argon tungsten arc welding are commonly used in galvanized steel structures.Gas welding was often used for welding galvanized pipes in the p