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                      | ● 标准 Standard美国石油学会标准(API SPEC 5CT)
 ● 用途 Uses
 油管用于油井中抽取石油或天然气
 套管用于油气井的井壁
 ●尺寸偏差 Deviation
 外径、壁厚、重量允许偏差
 
 
| 项目 Item |   | 允许偏差 Tolerances |  
| 外径 Outside Diameter | 管体 Pipe Body | D ≤ 101.6mm ± 0.79mm |  
| D ≥ 114.3mm(-0.5 %D~+1.0%D)
 |  
| 接箍 Coupling | ± 1%D |  
| 壁厚 Wall Thickness | - 12.5% |  
| 重量 Weight | 单根 Single Lengths | +6.5%~-3.5% |  
| 车载量 Carload Lots≥18144kg车载重<18144kg
 | - 1.75%- 3.5%
 |  ● 规格表 Size注: P —平端; N —不加厚; U —外加厚; T&C —车螺纹带接箍油管规格 Size of Tubing
 
 
 
| 尺寸代码 Size Desination | 重量代码 Weight Desination | 外径 Outside Diameter | 壁厚 Wall Thickness | 端部加工形式 Type of End Finish |  
| 钢级 Grade |  
| 不加厚 T&C Non-Upset | 外加厚 T&C External Upset | in | mm | in | mm | J55 | L80-1 | N80 1 、Q 类 | C90 | P110 |  
| 1.900 | 2.75 | 2.90 | 1.900 | 48.3 | 0.145 | 3.68 | PNU | PNU | PNU | PNU |   |  
| 2 3/8 | 4.00 | - | 2.375 | 60.3 | 0.167 | 4.24 | PN | PN | PN | PN | - |  
| 4.00 | 4.70 | 0.190 | 4.83 | PNU | PNU | PNU | PNU | PNU |  
| 5.80 | 5.95 | 0.254 | 6.45 | - | PNU | PNU | PNU | PNU |  
| 6.60 | - | 0.259 | 7.49 | P | P | P | - | - |  
| 7.35 | 7.45 | 0.336 | 8.53 | PU | PU | PU | PU | - |  
| 2 7/8 | 6.40 | 6.50 | 2.875 | 73.02 | 0.217 | 5.51 | PNU | PNU | PNU | PNU | PNU |  
| 7.80 | 7.90 | 0.276 | 7.01 | - | PNU | PNU | PNU | PNU |  
| 8.60 | 8.70 | 0.308 | 7.82 | - | PNU | PNU | PNU | PNU |  
| 9.35 | 9.45 | 0.340 | 8.64 | - | PU | - | PU | - |  
| 10.50 | - | 0.392 | 9.96 | - | P | - | P | - |  
| 11.50 | - | 0.440 | 11.18 | - | P | - | P | - |  
| 3 1/2 | 7.70 | - | 3.500 | 88.9 | 0.216 | 5.49 | PN | PN | PN | PN | - |  
| 9.20 | 9.30 | 0.254 | 6.45 | PNU | PNU | PNU | PNU | PNU |  
| 10.20 | - | 0.289 | 7.34 | PN | PN | PN | PN | - |  
| 12.70 | 12.95 | 0.375 | 9.52 | - | PNU | PNU | PNU | PNU |  
| 14.30 | - | 0.430 | 10.92 | - | P | - | P | - |  
| 15.50 | - | 0.476 | 12.09 | - | P | - | P | - |  
| 17.00 | - | 0.530 | 13.46 | - | P | - | P | - |  
| 4 | 9.50 | - | 4.00 | 101.6 | 0.226 | 5.74 | PN | PN | PN | PN | PN |  
| 尺寸代码 Size Desination | 重量代码 Weight Desination | 外径 Outside Diameter | 壁厚 Wall Thickness | 端部加工形式 Type of End Finish |  
| 钢级 Grade |  
| 不加厚 T&C Non-Upset | 外加厚 T&C External Upset | in | mm | in | mm | J55 | L80-1 | N80 1 、Q 类 | C90 | P110 |  
| 4 | - | 11.00 | 4.00 | 101.6 | 0.262 | 6.65 | PU | PU | PU | PU | PU |  
| 4 1/2 | 12.60 | 12.75 | 4.500 | 114.3 | 0.271 | 6.88 | PNU | PNU | PNU | PNU | PNU |  
| 15.20 | - | 0.337 | 8.56 | - | P | - | P | - |  
| 17.00 | - | 0.380 | 9.65 | - | P | - | P | - |  
| 18.90 | - | 0.430 | 10.92 | - | P | - | P | - |  
| 21.50 | - | 0.500 | 12.70 | - | P | - | P | - |  
| 23.70 | - | 0.560 | 14.22 | - | P | - | - | - |  
| 26.10 | - | 0.630 | 16.00 | - | P | - | P | - |  Note: P-Plain end N-Non upset threaded and coupled U-External upset threaded and coupled
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