The product is mainly composed of ductile cast iron and stainless steel belt, with the flexible design of stainless steel, it can fit well with the outer wall of the pipe, unlike traditional clamps that can only connect pipes of a single material with rigid connection requirements. It can simultaneously accommodate pipes of various materials with the same nominal diameter, greatly reducing the inventory of pipe installation companies. The ductile cast iron part can be customized with various threads according to construction needs for branch connection. The product is easy to install, and only a common wrench is needed, which can save a lot of installation and construction costs.