12cr1movg steel pipe

Classification of Alloy Tube 12Cr1MoVG

The biggest advantage of 12Cr1MoVG alloy tube is that it can be 100% recycled, which is in line with the national strategy of environmental protection, energy conservation, and resource conservation. National policies encourage the expansion of the application fields of 12Cr1MoVG high-pressure alloy tube.

At present, the consumption of 12Cr1MoVG alloy pipes in China accounts for only half of the total steel consumption compared to developed countries. The expansion of the use of 12Cr1MoVG alloy pipes provides a broader space for industry development. According to the research of the 12Cr1MoVG branch of the China Special Steel Association, the annual average growth rate of demand for 12Cr1MoVG long high-pressure alloy pipes in China can reach 10-12% in the future.

1. Seamless steel pipe

Due to their different manufacturing processes, they are divided into two types: hot-rolled (extruded) seamless steel pipes and cold drawn (rolled) seamless steel pipes. Cold drawn (rolled) pipes are divided into two types: circular pipes and irregular pipes.

a. Overview of Process Flow

Hot rolling (extruded seamless steel pipe): Round billet → Heating → Perforation → Three roll oblique rolling, continuous rolling or extrusion → Tube removal → sizing (or reducing) → Cooling → Blank tube → Straightening → Hydraulic test (or flaw detection) → Marking → Storage.

Cold drawn (rolled) seamless steel pipe: round billet → heating → perforation → heading → annealing → acid washing → oil coating (copper plating) → multi pass cold drawing (cold rolling) → billet → heat treatment → straightening → hydrostatic testing (flaw detection) → marking → storage.

b. Seamless steel pipes are divided into the following varieties according to their different uses:

GB/T8162-2008 (Seamless Steel Tubes for Structural Use). Mainly used for general and mechanical structures. Representative materials (grades): Carbon steel 20, 45 steel; Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.

GB/T8163-2008 (Seamless steel pipes for conveying fluids). Mainly used for transporting fluid pipelines on engineering and large equipment. The representative materials (grades) are 20, Q345, etc.

GB3087-2008 (Seamless Steel Tubes for Low and Medium Pressure Boilers). Mainly used for pipelines transporting low and medium pressure fluids in industrial and domestic boilers. The representative materials are 10 and 20 steel.

GB5310-2008 (Seamless Steel Tubes for High Pressure Boilers). Mainly used for high-temperature and high-pressure conveying fluid collection tanks and pipelines on power plants and nuclear power plant boilers. Representative materials include 20G, 12Cr1MoVG, 15CrMoG, etc.

GB5312-1999 (Seamless carbon steel and carbon manganese steel pipes for ships). Mainly used for Class I and II pressure resistant pipes for ship boilers and superheaters. The representative materials are 360, 410, 460 steel grades, etc.

GB6479-2000 (Seamless steel pipes for high-pressure fertilizer equipment). Mainly used for transporting high-temperature and high-pressure fluid pipelines on fertilizer equipment. Representative materials include 20, 16Mn, 12CrMo, 12Cr2Mo, etc.

GB9948-2006 (Seamless Steel Tubes for Petroleum Cracking). Mainly used for boilers, heat exchangers, and fluid pipelines in petroleum refineries. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.

GB18248-2000 (Seamless steel pipes for gas cylinders). Mainly used for making various gas and hydraulic gas cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.

GB/T17396-1998 (Hot rolled seamless steel pipes for hydraulic supports). Mainly used for making coal mine hydraulic supports and cylinders, columns, as well as other hydraulic cylinders and columns. Its representative materials are 20, 45, 27SiMn, etc.

GB3093-1986 (High pressure seamless steel pipes for diesel engines). Mainly used for high-pressure fuel pipes in diesel engine injection systems. The steel pipe is generally cold drawn, and its representative material is 20A.

GB/T3639-1983 (Cold drawn or cold-rolled precision seamless steel tubes). Mainly used for steel pipes in mechanical structures and carbon compression equipment, requiring high dimensional accuracy and good surface smoothness. Its representative materials include 20, 45 steel, etc.

GB/T3094-1986 (Cold drawn seamless steel pipe with irregular shape). Mainly used for making various structural components and parts, its material is high-quality carbon structural steel and low-alloy structural steel.

GB/T8713-1988 (Seamless steel pipes with precision inner diameter for hydraulic and pneumatic cylinders). Mainly used for making cold drawn or cold-rolled seamless steel pipes with precise inner diameter dimensions for hydraulic and pneumatic cylinder barrels. Its representative materials are 20, 45 steel, etc.

GB13296-1991 (Seamless stainless steel pipes for boilers and heat exchangers). 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. Its representative materials are 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, etc.

GB/T14975-1994 (Seamless stainless steel pipes for structural use). Steel pipes that are resistant to atmospheric and acid corrosion and have a certain strength, mainly used for general structures (hotel and restaurant decoration) and mechanical structures in chemical enterprises. Its representative materials are 0-3Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, etc.

GB/T14976-1994 (Seamless stainless steel pipes for fluid transport). Mainly used for pipelines transporting corrosive media. Representative materials include 0Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti, etc.

YB/T5035-1993 (Seamless steel pipe for automotive half shaft sleeve pipe). Mainly used for producing high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipes for automobile half axle sleeves and drive axle housing shaft pipes. Its representative materials are 45, 45Mn2, 40Cr, 20CrNi3A, etc.

API SPEC5CT-1999 (Specification for Casing and Tubing) is a globally recognized standard developed and published by the American Petroleum Institute (API). Among them: casing: a pipe that extends from the ground surface into the drilling well as a lining for the wellbore, and is connected between the pipes through couplings. The main materials are J55, N80, P110 and other steel grades, as well as C90, T95 and other steel grades resistant to hydrogen sulfide corrosion. Its lower steel grades (J55, N80) can be welded steel pipes. Oil pipe: a pipe inserted into a casing from the ground surface until it reaches the oil layer, and its pipes are connected by couplings or integral connections. Its function is to transport the oil from the reservoir to the surface through oil pipes by the pumping unit. The main materials are J55, N80, P110, as well as C90, which is resistant to hydrogen sulfide corrosion. It was developed and published by the American Petroleum Institute and is widely used around the world.

Weight formula for 12Cr1MoVG alloy tube: [(outer diameter wall thickness) * wall thickness] * 0.02466=kg/meter (weight per meter)