What is the difference between hot-dip galvanized steel pipe and hot-dip galvanized steel pipe SC

1. The designations for hot-dip galvanized steel pipe and hot-dip galvanized steel pipe SC are different: Hot-dip galvanized steel pipe generally refers to water pipes with a standard nominal diameter represented by the symbol DN. Hot-dip galvanized steel pipe SC indicates that the conductor is laid in a steel conduit (low-pressure fluid-welded steel pipe). SC is an ordinary welded steel pipe, equivalent to DN in water-related applications. SC is a concealed-welded steel pipe, generally with a thicker wall. S represents the pipe material, and C represents the laying method.

2. The manufacturing processes for hot-dip galvanized steel pipe and hot-dip galvanized steel pipe SC are different: Hot-dip galvanizing results in a thicker coating, thus providing stronger corrosion resistance. Hot-dip galvanized steel pipe SC has a uniform coating, better surface quality, and a coating thickness generally between a few micrometers and tens of micrometers. Hot-dip galvanizing is a chemical treatment involving an electrochemical reaction. Hot-dip galvanized steel pipe SC is a physical treatment, only brushing a layer of zinc onto the surface; there is no zinc coating inside, making hot-dip galvanized steel pipe SC prone to peeling. Hot-dip galvanizing is more commonly used in construction.

The common feature of hot-dip galvanized steel pipe and hot-dip galvanized steel pipe SC is that both belong to the category of galvanized steel pipe.