Precision hydraulic seamless steel pipe, cold drawn precision hydraulic seamless steel pipe, cold drawn black phosphating hydraulic seamless steel pipe, high precision white zinc plated hydraulic steel pipe. Precision hydraulic seamless steel pipe has superior mechanical properties, steel pipe is characterized by high precision, high finish. Due to the special bright heat treatment process, the inner and outer walls of the steel pipe do not produce oxide layer after heat treatment, and the inner and outer walls of the steel pipe have high cleanliness. The mechanical process performance of the steel pipe is excellent, and the steel pipe can withstand high pressure without leakage under various use environments. Cold bending does not deform, flaring, flattening without cracks, etc. The inner hole and the surface are treated by phosphating and rust prevention without pickling and can be installed directly. The advantages save time for customers and improve work efficiency. Precision hydraulic seamless steel pipes are widely used in injection molding machines, hydraulic machines, shoe-making machinery, hydraulic equipment, high-pressure oil pipes, ferrule (steel pipe) joint connections, rubber machinery, forging machinery, die-casting machines, construction machinery, sanitation vehicles, Automobile industry, shipbuilding industry, metal processing, military industry, diesel engine, internal combustion engine, air compressor, construction machinery, marine equipment (CCS certification), metallurgical equipment, agricultural and forestry machinery, etc, and establish a good reputation in various industries.