The introduce of carbon steel pipe

China carbon steel pipe factory said carbon steel pipe is made of steel ingot or solid round steel by piercing and then hot rolling, cold rolling or cold drawing. Carbon steel pipe plays an important role in China's steel pipe industry.

Carbon steel pipe is made of steel ingot or solid tube blank by piercing and then by hot rolling, cold rolling or cold drawing. Carbon steel pipe plays an important role in China's steel pipe industry. According to incomplete statistics, there are more than 240 existing carbon steel pipe manufacturers in China, more than 250 sets of carbon steel pipe units, with an annual capacity of more than 4.5 million tons. In terms of caliber, < φ 76 accounts for 35%, and < φ 159-650 accounts for 25%. In terms of varieties, 1.9 million tons of general-purpose pipes, accounting for 54%; 760000 tons of petroleum steel pipes, accounting for 5.7%; 150000 tons of hydraulic props and precision pipes, accounting for 4.3%; 50000 tons of stainless pipe bearing pipes and automobile pipes, accounting for 1.4%.

Carbon Steel Pipe

Carbon steel pipes are divided into hot-rolled and cold-rolled (drawn) steel pipes. Hot rolled carbon steel pipe is divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, oil cracking pipe, geological steel pipe and other steel pipes. Cold rolled (drawn) carbon steel pipe includes general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe and other steel pipes, as well as carbon thin-walled steel pipe, alloy thin-walled steel pipe, stainless thin-walled steel pipe and special-shaped steel pipe. The outer diameter of hot-rolled seamless pipe is generally larger than 32mm, the wall thickness is 2.5-75mm, the outer diameter of cold-rolled seamless pipe can be 6mm, the wall thickness can be 0.25mm, the outer diameter of thin-walled pipe can be 5mm, the wall thickness is less than 0.25mm, and the dimension precision of cold-rolled seamless pipe is higher than that of hot-rolled pipe. General carbon steel pipe: it is made of 10, 20, 30, 35, 45 and other high-quality carbon Steel 16Mn, 5mnv and other low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel by hot rolling or cold rolling. The seamless pipes made of 10, 20 and other low carbon steel are mainly used for fluid transmission pipes. Seamless tubes made of medium carbon steel such as 45, 40Cr are used to make mechanical parts, such as the stressed parts of automobiles and tractors. Generally, the strength and flattening test of carbon steel pipe shall be ensured. Hot rolled steel pipes shall be delivered in hot rolling or heat treatment state; cold rolled steel pipes shall be delivered in heat treatment state.