| 
 外径公差  | 
 壁厚公差  |  
| 
 不高于B级   | 
 不低于X42  |  
| 
 D<60.3   | 
 +0.41/-0.40mm   | 
 D<73   | 
 +20/-12.5%   | 
 D≥73   | 
 +15/-12.5%   |  
| 
 D≥60.3   | 
 +0.75/-0.40mm   | 
 D≥73   | 
 +15/-12.5%   | 
 D>73   | 
 +15/-12.5%   |   
| 
 产品规范水平  | 
 钢级  | 
 抗拉强度(MPa)  | 
 屈服强度(MPa)  | 
 延伸率(%)  |  
| 
 Min   | 
 Min   |  
| 
 PSL1   | 
 A25   | 
 310   | 
 172   | 
 查API SPEC 5L  |  
| 
 A   | 
 331   | 
 207   |  
| 
 B   | 
 414   | 
 241   |  
| 
 X42   | 
 414   | 
 290   |  
| 
 X46   | 
 434   | 
 317   |  
| 
 X52   | 
 455   | 
 359   |  
| 
 X56   | 
 490   | 
 386   |  
| 
 X60   | 
 517   | 
 414   |  
| 
 X65   | 
 531   | 
 448   |  
| 
 X70   | 
 565   | 
 483   |    
| 
 产品规范水平  | 
 钢级  | 
 抗拉强度(MPa)  | 
 屈服强度(MPa)  | 
 延伸率(%)  |  
| 
 Min   | 
 Max   | 
 Min   | 
 Max   |  
| 
 PLS2   | 
 B   | 
 414   | 
 758   | 
 241   | 
 448   | 
 查API SPEC 5L  |  
| 
 X42   | 
 414   | 
 758   | 
 290   | 
 496   |  
| 
 X46   | 
 434   | 
 758   | 
 317   | 
 524   |  
| 
 X52   | 
 455   | 
 758   | 
 359   | 
 531   |  
| 
 X56   | 
 490   | 
 758   | 
 386   | 
 544   |  
| 
 X60   | 
 517   | 
 758   | 
 414   | 
 565   |  
| 
 X65   | 
 531   | 
 758   | 
 448   | 
 600   |  
| 
 X70   | 
 565   | 
 758   | 
 483   | 
 621   |  
| 
 X80   | 
 621   | 
 827   | 
 552   | 
 690   |    
| 
 产品规范水平  | 
 钢级  | 
 C≤   | 
 Mn≤   | 
 P≤   | 
 S≤   |  
| 
 PSL1   | 
 A25   | 
 0.21   | 
 0.60   | 
 0.030   | 
 0.030   |  
| 
 A   | 
 0.22   | 
 0.90   | 
 0.030   | 
 0.030   |  
| 
 B   | 
 0.28   | 
 1.20   | 
 0.030   | 
 0.030   |  
| 
 X42   | 
 0.28   | 
 1.30   | 
 0.030   | 
 0.030   |  
| 
 X46、X52、X56   | 
 0.28   | 
 1.40   | 
 0.030   | 
 0.030   |  
| 
 X60、X65、X70   | 
 0.28   | 
 1.40   | 
 0.030   | 
 0.030   |  
| 
 PSL2   | 
 B   | 
 0.24   | 
 1.20   | 
 0.025   | 
 0.015   |  
| 
 X42   | 
 0.24   | 
 1.30   | 
 0.025   | 
 0.015   |  
| 
 X46、X52、X56   | 
 0.24   | 
 1.40   | 
 0.025   | 
 0.015   |  
| 
 X60、X65、X70、X80   | 
 0.24   | 
 1.40   | 
 0.025   | 
 0.015  |    |