Alloy seamless steel pipe is a type of seamless steel pipe. Its performance is much higher than that of ordinary seamless steel pipes because this steel pipe contains more Cr. Its high temperature resistance, low temperature resistance and corrosion resistance are better than other seamless steel pipes. Incomparable, so alloy pipes are widely used in petroleum, chemical, electric power, boiler and other industries.

Structural seamless steel pipes: mainly used for general structures and mechanical structures. Its representative materials (grades): carbon steel No. 20, No. 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.

Seamless steel pipes for transporting fluids: mainly used for transporting fluid pipelines in engineering and large-scale equipment. Representative materials (grades) are 20, Q345, etc.

Seamless steel pipes for low and medium pressure boilers: mainly used for pipelines transporting low and medium pressure fluids in industrial boilers and domestic boilers. The representative materials are No. 10 and No. 20 steel.

Seamless steel pipes for high-pressure boilers: mainly used for high-temperature and high-pressure-resistant fluid transport headers and pipes in power station and nuclear power plant boilers. Representative materials are 20G, 12Cr1MoVG, 15CrMoG, etc.

Carbon steel and carbon-manganese steel seamless steel pipes for ships: mainly used for grade I and II pressure-resistant pipes for ship boilers and superheaters. Representative materials are 360, 410, 460 steel grades, etc.

Seamless steel pipes for high-pressure fertilizer equipment: mainly used for conveying high-temperature and high-pressure fluid pipelines on fertilizer equipment. Representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.

Seamless steel pipes for petroleum cracking: mainly used in boilers, heat exchangers and fluid transport pipelines in petroleum smelting plants. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.

Seamless steel pipe for gas cylinders: mainly used to make various gas and hydraulic gas cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.

Hot-rolled seamless steel pipe for hydraulic props: mainly used to make hydraulic supports, cylinders and columns in coal mines, as well as other hydraulic cylinders and columns. Its representative materials are 20, 45, 27SiMn, etc.

High-pressure seamless steel pipe for diesel engines: mainly used for high-pressure oil pipes in diesel engine injection systems. The steel pipe is generally cold drawn pipe, and its representative material is 20A.

Cold-drawn or cold-rolled precision seamless steel pipes: Mainly used for mechanical structures and carbon pressing equipment, requiring high dimensional accuracy and good surface finish. Its representative materials include 20, 45 steel, etc.

Material of alloy pipe

12Cr1MoV, P22 (10CrMo910) T91, P91, P9, T9, WB36, Cr5Mo (P5, STFA25, T5,) 15CrMo (P11, P12, STFA22), 13CrMo44, Cr5Mo, 15CrMo, 25CrMo, 30CrMo, 40CrMo.

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