Seamless steel pipe is divided into two categories of hot-rolled and cold-rolled (dial) seamless steel pipe. Hot rolled seamless steel pipe general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, oil cracking pipe, geological steel pipe and other steel pipe. Cold rolled (dial) seamless steel pipe in addition to general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipe, but also includes carbon thin-walled steel pipe, alloy thin-walled steel pipe, stainless thin-walled steel pipe, shaped steel pipe. Hot rolled seamless pipe outer diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold rolled seamless steel pipe outer diameter can be up to 6mm, wall thickness can be up to 0.25mm, thin-walled pipe outer diameter can be up to 5mm wall thickness is less than 0.25mm, cold rolled than hot rolled dimensional accuracy.
General seamless steel pipe is made of 10#, 20#, 30#, 35#, 45# and other high-quality carbon steel 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other composite steel hot-rolled or cold-rolled. 10#, 20# and other low-carbon steel made of seamless pipe is mainly used for fluid transportation pipelines. 45, 40Cr and other medium carbon steel made of seamless pipe is used to manufacture mechanical parts, such as automobiles, tractor parts of the force. General use of seamless steel pipe to ensure the strength and flattening test. Hot-rolled steel pipe is delivered in the hot-rolled state or heat-treated state; cold-rolled is delivered in the heat-treated state.
Hot rolled seamless steel pipe, as the name implies, the temperature of the rolled parts is high, so the deformation resistance is small, and large deformation can be realized. Take the rolling of steel plate as an example, the general thickness of continuous casting billet is about 230mm, while after roughing and finishing, the final thickness of 1~20mm. at the same time, due to the small width-thickness ratio of the steel plate, the requirement of dimensional accuracy is relatively low, and is not prone to plate shape problems, to control the convexity of the main. For the organization requirements, generally through the control of rolling and cooling to achieve, that is, control the opening temperature of finishing rolling, final rolling temperature and curling temperature to control the microstructure and mechanical properties of the strip. Steel Pipe Product Name Steel Pipe Spot Material Steel Pipe Executive Standard Steel Pipe Spot Specification Steel Pipe Product Application Alloy Pipe 12Cr1MoVG
12CrMoG
15CrMoG
12Cr2Mo<A335P22>
Cr5Mo<A335P5>
Cr5Mo<A335P5>
<Cr9Mo<A335P9>
10Cr9Mo1VNb<A335P91>
15NiCuMoNb5<WB36>
12Cr2MoWVTiB<Steel Research 102> GB5310-2008
GB6479-2000
GB9948-2006
DIN17175-79
ASTM SA335
ASTM SA213
JISG3467-88
JISG3458-88 ∮8-1240*1- 200 Seamless steel pipe for petroleum, chemical, electric power and boiler industries with high temperature, low temperature and corrosion resistance Stainless steel pipe 0Cr18Ni9<304>
00Cr19Ni10<304L>
00Cr25Ni20<310S>
00Cr25Ni20<310S>
Steel pipe 0Cr18Ni9<304>
00Cr17Ni14Mo2<316L>
1Cr18Ni9Ti<321>
0Cr18Ni10Ti
0Cr18Ni11Nb<347>. GB/T14975-2002
GB/T14976-2002
GB13296-2007
ASTM A213
ASTM A269
ASTM A312
JIS G3459
DIN 17458 #. 6-630*0.5-60 Suitable for petroleum, aviation, smelting, food, water conservancy, electric power, chemical, chemical fiber, pharmaceutical machinery and other industries Low-temperature pipe 16MnDG, 10MnDG, 09DG
09Mn2VDG, 06Ni3MoDG
ASTM A333Grade1
ASTM A333Grade3
ASTM A333Grade4
ASTM A333Grade6
ASTM A333Grade7
ASTM A333Grade8
ASTM A333Grade9
ASTM A333Grade10
ASTM A333Grade11 GB/T18984-2003
ASTM A333 #8-1240*1-200 Seamless Steel Pipe for -45℃～-195℃ Cryogenic Pressure Vessel Piping and Cryogenic Heat Exchanger Piping High Pressure Boiler Tubes 20G
ASTM SA106B/C
ASTM SA210A/C
ST45.8-III GB5310-1995
ASTM SA106
ASTM SA210
DIN17175-79 #8-1240*1-200 Suitable for manufacturing high-pressure boiler heating pipe, collector box, boiler tube, boiler tube, boiler tube, boiler tube, boiler tube, boiler tube, boiler tube, boiler tube, boiler tube and boiler tube. Boiler heat pipe, header box, steam pipe, etc. High-pressure fertilizer pipe 10 #
20 #
16Mn GB6479-2000 #8-1240*1-200 Suitable for chemical equipment and pipelines with working temperature of -40-400℃ and working pressure of 10-32Mpa. 2013 #8-630*1-60 Furnace pipes, heat exchanger pipes and pipelines for petroleum refineries Low and medium pressure boiler tubes 10#
20#
16Mn<Q345A.B.C.D.E> GB3087-2008 #8-1240*1-200 Suitable for the manufacture of various structures of low and medium pressure boilers and locomotive boiler Conveying fluid pipe 10#,20#
ASTM A106A,B,C,A53A,B
16Mn<Q345A.B.C.D.E> GB/T8163-2008
ASTM A106
ASTM A53 #8-1240*1-200 is applicable to the manufacture of general seamless steel pipe for conveying fluid. General seamless steel pipe for conveying fluids General structural pipe 10#,20#,45#,27SiMn
ASTM A53A,B
16Mn<Q345A,B,C,D,E> GB/T8162-2008
GB/T17396-1998
ASTM A53 #8-1240*1-200 Suitable for general structure, engineering support, machining, etc. Oil casing J55, K55, N80, L80
C90, C95, P110 API SPEC 5CT
ISO11960 #60.23-508.00
*4.24-16.13 Oil pipe Used for pumping oil or natural gas in oil wells Casing is used as the wall of oil and gas wells Line pipe A,B,X42,X46,X52,X56,X60,X65,X70,X80
L245,L290,L360,L415,L450 API SPEC 5L
GB/T9711.1
GB/ T9711.2 #32-1240*3-100 Oxygen, water and oil transportation pipe for oil and gas industry Straight seam steel pipe 20#, Q195, Q215A,B
Q235A,B, Q345A,B,C,D,E GB/T13793-1992
GB3091-2001 #32-630*1 -30 Suitable for general structural support, low-pressure fluid transportation, etc. Spiral steel pipe Q235A-B, Q345A-E SY/T5037-2000 219-2820*4-20 Suitable for low-pressure fluid transportation steel pipe 1 Structural seamless pipe (GB/T8162-2008) is a seamless steel pipe used for general structure and mechanical structure.
2 Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used for transportation of water, oil, gas and other fluids.
3 Seamless Steel Pipe for Low and Medium Pressure Boilers (GB3087-2008) is a hot-rolled and cold-drawn (rolled) seamless steel pipe of high-quality carbon structural steel used in the manufacture of superheated steam pipes and boiling water pipes for low and medium pressure boilers of various structures, as well as superheated steam pipes and arching brick pipes for locomotive boilers.
4 high pressure boiler seamless steel pipe (GB5310-2008) is used in the manufacture of high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel pipe for high pressure and above pressure water pipe boiler heating surface.
5 High-pressure seamless steel pipe for chemical fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless pipe for chemical equipment and pipelines with working temperature of -40~400℃ and working pressure of 10~30Ma.
6 Seamless steel pipe for petroleum cracking (GB9948-2006) is seamless steel pipe for furnace pipe, heat exchanger and pipeline applicable to petroleum refinery.
7Steel Pipe for Geological Drilling (YB235-70) is a steel pipe used for core drilling by geological departments, which can be divided into drill pipes, drill collars, core tubes, casing and precipitation tubes according to their uses.
8Seamless steel pipes for diamond core drilling (GB3423-82) are seamless steel pipes for drill pipes, core pipes and casing used for diamond core drilling.
9 oil drilling pipe (YB528-65) is a seamless steel pipe used for oil drilling with inner or outer thickening at both ends. Steel pipe is divided into two kinds of car wire and not car wire, car wire pipe with joints coupling, not car wire pipe with butt welding method and tool joints coupling.
10 ships with carbon steel seamless steel pipe (GB5213-85) is the manufacture of ships class I pressure-resistant pipe system, class II pressure-resistant pipe system, boilers and superheaters with carbon steel seamless steel pipe. Carbon steel seamless steel pipe wall operating temperature does not exceed 450 ℃, alloy steel seamless steel pipe wall operating temperature exceeds 450 ℃.
11 automobile half-axle casing with seamless steel pipe (GB3088-82) is the manufacture of automobile half-axle casing and drive axle housing axle tube with high quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe.
12 High-pressure oil pipe for diesel engine (GB3093-2002) is a cold-drawn seamless steel pipe for manufacturing high-pressure pipe for diesel engine injection system.
13 Hydraulic and pneumatic cylinder barrel with precision internal diameter seamless steel tube (GB8713-88) is the manufacture of hydraulic and pneumatic cylinder barrel with precision internal diameter size of cold-drawn or cold-rolled precision seamless steel tube.
14 cold-drawn or cold-rolled precision seamless steel tube (GB3639-2000) is used for mechanical structure, hydraulic equipment with high dimensional accuracy and good surface finish of cold-drawn or cold-rolled precision seamless steel tube. Selection of precision seamless steel pipe manufacturing mechanical structure or hydraulic equipment, etc., can greatly save machining man-hours, improve material utilization rate, and at the same time conducive to improving product quality.
15 structural stainless steel seamless steel pipe (GB/T14975-2002) is widely used in chemical, petroleum, textile, medical, food, machinery and other industries, corrosion-resistant piping and structural components and parts of the stainless steel made of hot-rolled (extruded, expanded) and cold-drawn (rolled) seamless steel pipe.
16Stainless steel seamless pipes for fluid transportation (GB/T14976-2002) are hot-rolled (extruded, expanded) and cold-drawn (rolled) seamless steel pipes made of stainless steel used for the transportation of fluids.
17 shaped seamless steel pipe is a general term for seamless steel pipe of other cross-sectional shapes in addition to round pipe. According to the different dimensions of the cross-section shape of the pipe can be divided into equal wall thickness profiled seamless steel pipe (code D), unequal wall thickness profiled seamless steel pipe (code BD), variable diameter profiled seamless steel pipe (code BJ). Profiled seamless steel pipe is widely used for various structural parts, tools and mechanical parts. Compared with round pipe, profiled pipe generally has a larger moment of inertia and section modulus, has a larger bending and torsion resistance, can greatly reduce the weight of the structure, saving steel.
18 low-temperature piping seamless steel pipe (GB/T18984-2003) for -45 ℃ ~ -195 ℃ level of low-temperature pressure vessel piping, as well as low-temperature heat exchanger piping seamless steel pipe.