Sizes:
Maximum diameter: 36" (914.4mm) minimum diameter: 1/2" (21.3mm)
Maximum thickness: 60mm mininmum thickness: 2.11mm
SCH: SCH10,SCH20,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120,SCH160,XXS
Uses:
| Chilled water pipe | Steam/condensate pipe | Heat exchanger pipe | Marine/offshore pipe | Dredging pipe | Industrial pipe |
| Oil and gas pipe | Fire fighting pipe | Construction/structure pipe | Irrigation pipe | Drain/sewage pipe | Boiler tube |
Coating
| 3PE Coating | 3PP Coating | FBE Coating | Epoxy Coating | Special Painting |
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 |
Chemical components & mechanical properties
| Standard | Grade | Chemical Components (%)
| Mechanical Properties
|
| ASTM A53 | C
| Si
| Mn
| P
| S
| Tensile STrength(Mpa)
| Yield STrength(Mpa)
|
|
| A | ≤0.25
| - | ≤0.95
| ≤0.05
| ≤0.06
| ≥330
| ≥205
|
|
| B | ≤0.30
| - | ≤1.2
| ≤0.05
| ≤0.06
| ≥415
| ≥240
|
|
| ASTM A106 | A
| ≤0.30
| ≥0.10
| 0.29-1.06
| ≤0.035
| ≤0.035
| ≥415
| ≥240
|
|
B
| ≤0.35
| ≥0.10
| 0.29-1.06
| ≤0.035
| ≤0.035
| ≥485
| ≥275
|
|
| ASTM SA179 | A179 | 0.06-0.18
| - | 0.27-0.63
| ≤0.035
| ≤0.035
| ≥325 | ≥180
|
|
| ASTM SA192 | A192 | 0.06-0.18
| ≤0.25
| 0.27-0.63
| ≤0.035
| ≤0.035
| ≥325
| ≥180
|
|
| API 5L PSL1 | A | 0.22
| - | 0.90
| 0.030
| 0.030
| ≥331
| ≥207
|
|
B
| 0.28
| - | 1.20 | 0.030
| 0.030
| ≥414
| ≥241
|
|
X42
| 0.28
| - | 1.30 | 0.030
| 0.030
| ≥414
| ≥290
|
|
X46
| 0.28
| - | 1.40 | 0.030
| 0.030
| ≥434
| ≥317
|
|
X52
| 0.28
| - | 1.40
| 0.030
| 0.030
| ≥455
| ≥359
|
|
X56
| 0.28
| - | 1.40
| 0.030
| 0.030
| ≥490
| ≥386 |
|
X60
| 0.28
| - | 1.40
| 0.030
| 0.030
| ≥517
| ≥448 |
|
X65
| 0.28
| - | 1.40
| 0.030
| 0.030
| ≥531
| ≥448 |
|
X70
| 0.28
| - | 1.40
| 0.030
| 0.030
| ≥565
| ≥483
|
|
| API 5L PSL2 | B
| 0.24
| - | 1.20
| 0.025
| 0.015
| ≥414
| ≥241
|
|
X42
| 0.24
| - | 1.30
| 0.025
| 0.015
| ≥414
| ≥290
|
|
X46
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥434
| ≥317
|
|
X52
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥455
| ≥359
|
|
X56
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥490
| ≥386
|
|
X60
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥517
| ≥414
|
|
X65
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥531
| ≥448
|
|
X70
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥565
| ≥483
|
|
X80
| 0.24
| - | 1.40
| 0.025
| 0.015
| ≥621
| ≥552
|
|
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%
|
Production of seamless pipe
The process begins with solid steel rounds, or billets, being cut to a specified length and sent through a walking-beam reheat furnace, where temperatures reach nearly 2,300°F. After exiting the reheat furnace, the preheated rounds are turned into a tube shell in the rotary piercing mill as the billets are cross-rolled between two barrel-shaped rolls at a high speed. The seamless shells enter mandrel mill, where they are rolled over a retained mandrel to provide the needed OD size and wall thickness for the next process. The process is carefully monitored using a state-of-the-art hot-wall measuring system. The shells are then reheated for final forming in a 24-stand stretch-reducing mill, where outside diameters are formed to customers’ exacting specifications. Wall thickness is again verified using a hot-wall measuring system. After being rotated and advanced on the walking-beam cooling bed, the pipes are batch cut and transferred to an in-process storage area, where they are handled by computer-controlled gantry cranes.