| Type: | Seamless |
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| Technique: | Hot Rolled |
| Material: | Carbon Steel |
| Surface Treatment: | Customer Requirements |
| Usage: | Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose |
| Section Shape: | Round |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier Seamless carbon steel tube is made of steel ingot or solid tube billet perforated into wool tube, and then hot rolled, cold rolled or cold drawn.
The raw material of seamless carbon steel pipe is round tube billet, round tube billet to be cut by the cutting machine, the length of the billet is about 1 meter, and sent to the furnace by the conveyor belt heating. The billet is fed into a furnace and heated to about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is the key problem. After the round tube billet comes out, it is perforated by the pressure punch. After perforation, the round tube billet is successively rolled by three high diagonal, continuous rolling or extrusion. After extrusion, the pipe should be removed for sizing. The caliper rotates into the steel embryo through a conical drill at high speed to punch holes and form steel pipes. The inner diameter of the steel pipe is determined by the outer diameter length of the caliper drill bit. After sizing the steel pipe, it enters the cooling tower and is cooled by spraying water. After cooling the steel pipe, it will be straightened. After straightening, the steel pipe is sent by conveyor belt to the metal inspection machine (or hydraulic test) for internal inspection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. Steel pipe quality inspection after the strict hand selection. After the steel pipe is inspected, the number, specification and production lot number are sprayed with paint. And by the crane into the warehouse.
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Standard
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API, ASTM, BS, DIN, GB, JIS
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Outside Diameter
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21.3-1420mm
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Wall Thickness
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2.11-300mm
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Materials |
10#,20#,45#,Q235,Q345,Q195,Q215,Q345C,Q345A
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ASTM A53A/A53B/ A178C/A106B API5L
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ST37,ST37-2,DIN 1629 ST35, ST45,DIN 17175 ST35.8,DIN 17175 19Mn5
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16Mn,Q345B,T1,T2,T5,T9,T11,T12,T22,T91,T92,P1,P2,P5,P9,P11,P12,P22,P91,P92,15CrMO,Cr5Mo,10CrMo910,12CrMo,13CrMo44,30CrMo,A333
GR.1,GR.3,GR.6,GR.7 |
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Gr.B,X42,X46,X52,X60,X65,X70,X80,X100
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| Certification |
ISO,BV,SGS,MTC
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Packing
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Steel strip packed. Standard Export Seaworthy Package.Suit forall kinds of transport,or as required
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Application
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Widely used in Structure, Accessorize,Construction,
Fluid transportation,machinery parts,the stress parts of the automobile tractor parts and so on |
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MOQ
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1 ton,sample order accepted
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Shipment time
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Within 7-10 workdays after receiving deposit or L/C
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| Standard of carbon seamless steel pipe | |
| ASTM A53 Gr.B | Black and hot-dipped zinc-coated steel pipes welded and seamless |
| ASTM A106 Gr.B | Seamless carbon steel for high temperature service |
| ASTM SA179 | Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes |
| ASTM SA192 | Seamless carbon steel boiler tubes for high pressure |
| ASTM SA210 | Seamless Medium-carbon boiler and superheater tubes |
| ASTM A213 | Seamless alloy-steel boiler, superheater, and heat-exchanger tubes |
| ASTM A333 GR.6 | seamless and welded carbon and alloy steel pipe intended for use at low temperatures. |
| ASTM A335 P9,P11,T22,T91 | Seamless ferritic alloy-steel pipe for high-temperature service |
| ASTM A336 | Alloy steel forgings for pressure and high-temperature parts |
| ASTM SA519 4140/4130 | Seamless carbon for mechanical tubing |
| API Spec 5CT J55/K55/N80/L80/P110/K55 | Seamless steel pipe for casing |
| API Spec 5L PSL1/PSL2 Gr.b, X42/46/52/56/65/70 | Seamless steel pipe for line pipe |
| DIN 17175 | Seamless steel tube for elevated temperture |
| DN2391 | Cold drawn seamless prevision pipe |
| DIN 1629 | Seamless circular unalloyed steel tubes subject to special requirements |
| Classfication of carbon seamless steel pipe | |
| Types | Application |
| Structure Purposes | General structure and mechanical |
| Liquid Services | Petroleum, gas and other fluids conveying |
| Low and Medium Pressure Boiler Tube | Steam and boiler manufacturing |
| Hydraulic Pillar Service | Hydraulic support |
| Auto Semi-shaft Casing | Auto sem-shaft casing |
| Line Pipe | Oil and gas conveying |
| Tubing and Casing | Oil and gas conveying |
| Drill Pipes | Well drilling |
| Geological Drilling Pipe | Geological drilling |
| Furnace tubes, heat exchangers tubes | Furnace tubes, heat exchangers |
| Tolerances of carbon seamless steel pipe | ||
| Pipe types | Pipe sizes(mm) | Tolerances |
| Hot rolled | OD<50 | ±0.50mm |
| OD≥50 | ±1% | |
| WT<4 | ±12.5% | |
| WT 4~20 | +15%, -12.5% | |
| WT>20 | ±12.5% | |
| Cold drawn | OD 6~10 | ±0.20mm |
| OD 10~30 | ±0.40mm | |
| OD 30~50 | ±0.45 | |
| OD>50 | ±1% | |
| WT≤1 | ±0.15mm | |
| WT 1~3 | +15%, -10% | |
| WT >3 | +12.5%, -10% | |
Packing: For 1/2" to 8" seamless steel tube, packaging always be in bundles with steel strip, 9'' and upper size will be in loose.
Coating type: bare, varnish painting(anti-rusted painting), hot dipped galvanized, 3LPE, 3PP End protect: plastic ends cap, end protector.
Shandong Renai Iron&Steel Co.,Ltd.
Located in Liaocheng city, Shandong province,which is a picturesque city be crowned as "the Oriental Venice". In order to meetcustomer request of product variety,we established long term friendly cooperation with famous domestic mill plants. With goodreputation in Europe, Southeast Asia, Middle East, South America and Africa,our annual export volume twenty-five milliondollars,about forty percentage of total sales,especially our Wear Resistant Steel Plate, Weathering Steel Plate, High Strength Carbon Steel Plate are popular with Southeast Asia, Middle East customer .
Suppliers with verified business licenses
Audited Supplier 
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