Function:

By filling the air pipe with inert gas, the cooling water circulates and flows directly from the core of the roller sets to take away the heat of the welding roller sets. This cooling structure is very precise and effectively solves the defect that the welding roller set is difficult to cool down.The welded pipe is always in a closed environment in the process of welding protection, which can effectively improve the welding quality, so that the welded pipe will not be black and the same color as the base material.