The Seamless Steel Tube can be divided into the following varieties due to its different uses:
GB/T8162-1999(Seamless Steel Tube for structure).It is mainly used for general structures and mechanical structures.Its representative material(grade):carbon steel 20,45 steel;Alloy steel Q345,20Cr,40Cr,20CrMo,30-35CrMo,42CrMo,etc.
GB/T8163-1999(Seamless Steel Tube for Fluid Transmission).It is mainly used for conveying fluid pipelines on engineering and large equipment.Representative materials(grades)are 20,Q345,etc.
GB3087-1999(Seamless Steel Tube for Low and Medium Pressure Boiler).It is mainly used for industrial boilers and domestic boilers to transport low and medium pressure fluids.The representative materials are 10#and 20#steel.
GB5310-1995(Seamless Steel Tube for High Pressure Boiler).It is mainly used for high temperature and high pressure transmission fluid header and pipeline of power plant and nuclear power plant boiler.Representative materials are 20G,12Cr1MoVG,15CrMoG,etc.
GB5312-1999(Marine Carbon Steel and Carbon Manganese Steel Seamless Steel Tube).It is mainly used for Class I and II pressure pipes for marine boilers and superheaters.The representative materials are 360,410,460 steel grades,etc.
GB1479-2000(Seamless Steel Tube for high-pressure fertilizer equipment).It is mainly used for conveying high-temperature and high-pressure fluid pipelines on fertilizer equipment.Representative materials are 20,16Mn,12CrMo,12Cr2Mo,etc.
GB9948-1988(Seamless Steel Tube for Petroleum Cracking).It is mainly used for boilers,heat exchangers and fluid transmission pipelines in oil refineries.The representative materials are 20,12CrMo,1Cr5Mo,1Cr19Ni11Nb,etc.
GB18248-2000(Seamless Steel Tube for gas cylinders).It is mainly used for making various gas and hydraulic cylinders.The representative materials are 37Mn,34Mn2V,35CrMo,etc.
GB/T17396-1998(Hot rolled Seamless Steel Tube for Hydraulic Props).It is mainly used for making coal mine hydraulic supports,cylinders and columns,as well as other hydraulic cylinders and columns.The representative materials are 20,45,27SiMn,etc.
GB3093-1986(High Pressure Seamless Steel Tube for Diesel Engines).It is mainly used for high-pressure fuel pipe of diesel engine injection system.The steel pipe is generally cold drawn,and its representative material is 20A.
GB/T3639-1983(Cold drawn or cold rolled precision Seamless Steel Tube).It is mainly used for steel pipes with high dimensional accuracy and good surface finish for mechanical structures and carbon compression equipment.Its representative materials are 20,45 steel,etc.
GB/T3094-1986(Cold drawn Seamless Steel Tube Shaped Steel Pipe).It is mainly used to make various structural parts and components,which are made of high-quality carbon structural steel and low alloy structural steel.
GB/T8713-1988(Seamless Steel Tube for Hydraulic and Pneumatic Cylinders).It is mainly used for cold drawn or cold rolled Seamless Steel Tube with precise inner diameter for making hydraulic and pneumatic cylinders.The representative materials are 20,45 steel,etc.
GB13296-1991(Stainless Steel Tube for Boiler and Heat Exchanger).It is mainly used for boilers,superheaters,heat exchangers,condensers,catalytic tubes,etc.in chemical enterprises.High temperature,high pressure and corrosion resistant steel pipes are used.The representative materials are 0Cr18Ni9,1Cr18Ni9Ti,0Cr18Ni12Mo2Ti,etc.
GB/T14975-1994(Stainless Steel Tube for Structure).It is mainly used for atmospheric and acid corrosion resistant steel pipes with certain strength for general structures(hotels and hotel decoration)and mechanical structures of chemical enterprises.The representative materials are 0-3Cr13,0Cr18Ni9,1Cr18Ni9Ti,0Cr18Ni12Mo2Ti,etc.
GB/T14976-1994(Stainless Steel Tube for Fluid Transport).It is mainly used to transport corrosive media.Representative materials are 0Cr13,0Cr18Ni9,1Cr18Ni9Ti,0Cr17Ni12Mo2,0Cr18Ni12Mo2Ti,etc.
YB/T5035-1993(Seamless Steel Tube for Automobile Half Axle Sleeve).It is mainly used to make high-quality carbon structural steel and alloy structural steel hot-rolled Seamless Steel Tube for automobile half axle sleeve and axle tube of drive axle housing.The representative materials are 45,45Mn2,40Cr,20CrNi3A,etc.