The series of product is comprised of B, X42, X46, X52, X56, X60, X65, X70, X80, X90 by strength; it can be grouped into longitudinal submerged arc welding (LSAW), electric resistance weld pipe (ERW), spiral submerged arc welding (SSAW) pipe by welding process; it can be divided into oil transportation pipeline, natural gas pipeline, pipeline steel for acid environment and o-cean environment by medium and environment. Except the oil and natural gas industry application, this kind of pipeline can be widely used in pressure-bearing transportation such as water trans- portation, chemical material and mineral slurry. With different pipe manufacturing processes and applications, the detail supply technology specification could be different.