无缝钢管根据用途不同， 有厚壁无缝钢管和薄壁无缝钢管。无缝钢管用途很广泛。

1、一般用途的无缝钢管根据材质，由普通的碳素结构钢、低合金结构钢或合金结构钢轧制。比如10号、20号等低碳钢制造的无缝管，主要用作蒸汽、煤气、液化气、天然气、各种石油产品及各种其他气体或液体的输送管道；45、40Cr等中碳钢制造的无缝管，主要用来制造各种机器配件及管道配件。

2、一般用途的无缝钢管也分按化学成分和机械性能供应，按水压试验供应。承受流体压力的无缝钢管，应保证水压试验合格。

3、专门用途的无缝管用于锅炉、地质勘探、轴承、耐酸等。如石油地质钻探管、石油化工用的裂化管、锅炉管、轴承管以及汽车、拖拉机、航空用高精度结构钢管。

Seamless steel pipe has thick wall seamless steel pipe and thin wall seamless steel pipe according to different purposes. Seamless steel pipe is widely used.

1. Seamless steel pipes for general purposes are rolled from ordinary carbon structural steel, low alloy structural steel or alloy structural steel according to the material. For example, seamless pipes made of low carbon steel such as No. 10 and No. 20 are mainly used as transmission pipelines for steam, gas, liquefied gas, natural gas, various petroleum products and various other gases or liquids; Seamless pipes made of medium carbon steel such as 45 and 40Cr are mainly used to manufacture various machine accessories and pipe accessories.

2. Seamless steel pipes for general purposes are also supplied according to chemical composition and mechanical properties and hydrostatic test. Seamless steel pipes bearing fluid pressure shall be qualified in hydrostatic test.

3. Special purpose seamless pipe is used for boiler, geological exploration, bearing, acid resistance, etc. Such as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural steel pipe for automobile, tractor and aviation.