Seamless steel pipe is made of whole round steel perforated, the surface of the steel pipe without weld, called seamless steel pipe. According to the production method, the seamless steel pipe can be divided into hot rolled seamless steel pipe, cold rolled seamless steel pipe, cold drawn seamless steel pipe, extrusion seamless steel pipe, pipe jacking and so on. According to the section shape, the seamless steel pipe is divided into round and irregular two kinds, irregular pipe has square, oval, triangle, hexagonal, melon seed shape, star shape, with a variety of complex shapes. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick wall seamless steel pipe and thin wall seamless steel pipe. Seamless steel pipe is mainly used for petroleum geological drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe and automobile, tractor, aviation high-precision structural steel pipe.
In the 10th week of 2023 (2023.3.6-3.10), the national absolute price index of Lange Steel was 4,613 yuan, up 1.2% from last week and down 12.7% from the same period last year. Among them, Lange Iron and steel long material absolute price index was 4,456 yuan, up 0.9% from last week, down 11.4% from the same period last year; The absolute price index of Lange steel profiles was 4596 yuan, up 1.6% from last week, down 14.1% from the same period last year; The absolute price index of Lange steel sheet was 4,692 yuan, up 1.4% from last week and down 13.3% from the same period last year; The Lange Absolute Price index for steel and pipe was 5,029 yuan, up 0.7% from last week and down 13.9% from the same period last year