Carbon Seamless Steel Pipe / Tube
Seamless carbon steel pipes are made of steel ingots or solid billets through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn. The raw material of carbon steel pipe is a round tube blank, which is cut by a cutting machine into a billet with a length of about 1 meter, and sent to a furnace for heating through a conveyor belt. The billets are fed into the furnace and heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a critical issue. After the round tube blank is released from the furnace, it is pierced through a pressure punching machine. Generally, the more common punching machine is the conical roller punching machine. This kind of punching machine has high production efficiency, good product quality, large amount of perforation and diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively cross-rolled, continuously rolled or extruded by three rolls.
1. Seamless steel pipe for structure (GBT8162-2008). Mainly used for general structure and mechanical structure. Its representative material (brand): carbon steel, 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
2. Seamless steel pipes for conveying fluids (GBT8163-2008). It is mainly used for conveying fluid pipelines in engineering and large-scale equipment. The representative material (grade) is 20, Q345, etc.
3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam pipes, large smoke pipes, small smoke pipes and arch bricks for locomotive boilers Hot-rolled and cold-drawn (rolled) seamless steel pipes of high-quality carbon structural steel for pipes. The representative material is 10, 20 steel.
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Material:
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A36,A53,A106,A192,ST52,Q355,A210,T12,T11,P5,P9,P91,T22,A333,4140,5135 etc.
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Grade(EN):
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1.7220,1.7336,1.2601,1.7380,1.7335,1.0033,1.0116 etc.
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Size
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Outer Diameter
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Seamless:17-914mm 3/8"-36"
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Wall Thickness
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2-60mm SCH10 SCH20 SCH30 STD SCH40 SCH60 XS SCH80
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Length
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1-12m as customer requirement
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Ends
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Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded andcoupling,etc.
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Surface Treatment
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Bare,Painting black,varnished,galvanized,anti-corrosion 3PE PP/EP/FBE coating
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Technical Methods
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Hot-rolled/Cold-drawn/Hot-expanded
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Testing Methods
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Pressure test,Flaw detection,Eddy current testing, Hydrostatic testing or Ultrasonicexamination and also with chemical and
physical property inspection |
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Third Party Inspection
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SGS BV MTC
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Trade Terms
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FOB CIF CFR
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Payment Terms
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FOB 30%T/T,70% before shipment
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CIF 30% pre-payment and the balance to be paid upon B/L (copy)
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or Irrevocable 100% L/C at sight
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| Why you choose us? | |||
| 1. more than 20 years experiences in steel business | |||
| 2. good quality | |||
| 3. competitive price | |||
| 4. meet your needs via reprocessing | |||
| 5. excellent service | |||
| 6. short delivery time | |||
| 7. long mutual beneficial business cooperation |
| Descriptions | Grades | Standard | Specification (OD*WT)mm |
Usage |
| Structural steel pipe | 20# 35# 45# Q345B, 16Mn, Q345B-E, 20Mn2, 25Mn, 30Mn2, 40Mn2, 45Mn2, SAE1018, SAE1020, SAE1518, SAE1045. | GB/T8162-2008, ASTM A29/A29M-2015 | 6-1020*1.5-100 | For commom structure |
| Fluid steel pipe | 10#, 20#, ASTM A106, A210, A53, 16Mn, Q345A.B.C.D.E, Q295B.C.D.E | GB/T8163-2008 | 8-630*1.0-40 | Fluid feeding |
| High pressure boiler pipe | 20G, 15MnG, 20MnG, 15CrMoG, 12Cr1MoVG, St35.8, St45, SA106b, SA106c, SA210a, SA210c, A335P2, P11, P12, P22, P91, P92, A213 T2, T9, T11, T12, T22, T23, T91 | GB/5310-2008, ASTM A 106-99, DIN 17175-79 | 14-630*2-80 | Temperature-resistant seamless steel pipe far high-pressure boiler |
| Oil casing pipe | API SPEC 5CT J55, K55, N80, L80, C90, C95, P110 | API SPEC 5CT, SY/T6194-96, GB/T222-84, | 10-530*1.5-36 | Boiler pipes for refinery,heatexchangeing pipes,seamless steel pipes for pipeline |
| Pipeline | API SPEC 5L, X42, X52, X60, X65,X70,X80 ASTM A53, ASTM A106, ASTM A333, BS301, BS3602, BS3603, BS3604, PSL1, PSL2, DNV-OS-F101, CSA-Z245 |
API SPEC 5L, ISO 3183, GB/T 9711 | 60-630*1.5-40 | Carrying gas,water or oil in the industries of petroleum and natural gas |
| Alloy steel pipe | 4140, 42CrMo, 32CrMo, 15CrMo, Cr5Mo, 13CrMo44, 12Cr1MoV P22 T91,P91,P9, T9, Wb36 | GB5310-95, GB9948-88, ASTM A335/A335M, ASTM A213/213M, DIN17175-79, JISG3467-88, JISG3458-88 |
16-824*2-100 | The seamless steal pipes features resistance to high presure,high/low temperature and corrosion ano is used in the industries of petroleum, chemical engineering and. Electric pwer as well as boiler |
| Hydraulic prop pipe | 20#, 45#, 27SiMn, 30CrMoSiA | GB/T17396-2009 | 70-377*9-40 | Coal mine hydraulic support and pillar cylinder, column, can also be used for other hydraulic cylinder, column |
