Seamless steel pipe is a hollow section, peripheral no juncture of strip steel.Seamless steel pipe is hollow section, a large number of used for conveying fluid pipe, such as oil, natural gas, coal gas, water and some solid materials, such as pipelines.
 
Compared to the steel pipe and round steel solid steel bending torsional strength phase at the same time, the weight is lighter, is a kind of economic cross section steel, widely used in the manufacture of structural and mechanical parts, such as petroleum drill pipe, auto transmission shaft, bicycle frame and construction of steel scaffolding is used with steel pipe manufacturing annular parts, such as can improve material utilization, simplifying the manufacturing process, material saving and processing time, has been widely used to make steel pipe.Steel pipe or all kinds of conventional weapons indispensable materials, gun barrel to steel pipe manufacturing. Steel pipe according to the cross-sectional area in the shape of different can be divided into circular tube and special pipe.Due to equal under the condition of the circumference, circle area is larger, with a round tube can deliver more fluid.In addition, the circle cross section under radial pressure, the internal or external stress is relatively uniform, therefore, the vast majority of steel tube is round tube.
 
Application: for conveying water general fluid such as gasoline;The general structure and the mechanical structure;Low medium pressure boiler;High pressure boiler tube, fertilizer equipment used;Oil cracking.
 
Execution standard seamless steel pipe:
1, the structure with seamless tube (GB/T8162-2008) is used for general structure and the mechanical structure of seamless steel tube. 
2, fluid with seamless steel tube transmission (GB/T8163-2008) is used for conveying water, oil, gas and other fluid general seamless steel tube. 
3 low and medium pressure boiler seamless steel tube (GB3087-2008) is used in the manufacture of various structural low intermediate pressure boiler superheated steam pipe, water pipe and locomotive boiler superheated steam pipe and arch brick works of high quality carbon structural steel hot rolling and cold drawing (rolling) seamless steel tube. 
4, high pressure boiler seamless steel tube (GB5310-2008) is used in the manufacture of high pressure and over pressure of the water tube boiler heating surface quality carbon steel, alloy steel and heat resistant stainless steel seamless steel tube. 
5, fertilizer equipment with high-pressure seamless steel tube (GB6479-2000) is applicable to the working temperature for - 40 ~ 400 ℃, the working pressure of 10 ~ 30 ma chemical equipment and pipeline of high quality carbon structural steel and alloy steel seamless steel tube. 
6 with seamless steel tube, petroleum cracking (GB9948-2006) is suitable for oil refinery furnace tube, heat exchangers and pipe seamless steel pipe. 
 
Theoretical weight formula - wall thickness (diameter) * wall thickness * * m = 0.0246615/1000 tonnage
Seamless steel tube:
Specification: 16-426 * 2-100
Material: 10 #, 20 #, 35 #, 45 #, Q345B, 20 g, 12 cr1movg, 15 crmog,
20 g, 12 cr1mov, 15 crmo