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  | 
 公稱尺寸/mm  | 
 外徑/mm  | 
 外徑允許偏差/mm  | 
 壁  厚/mm  | 
 壁厚允許偏差/mm  | 
 理論質量(不計管接頭)/(kg/m)  | 
| 
 13  | 
 12.70  | 
 ±O.20  | 
 1.60  | 
 ±0.15  | 
 O.438  | 
| 
 16  | 
 15.88  | 
 ±O.20  | 
 1.60  | 
 ±O.15  | 
 O.581  | 
| 
 19  | 
 19.05  | 
 ±O.25  | 
 1.80  | 
 ±0.20  | 
 0.766  | 
| 
 25  | 
 25.40  | 
 ±O.25  | 
 1.80  | 
 ±0.20  | 
 1.O48  | 
| 
 32  | 
 31.75  | 
 ±O.25  | 
 1.80  | 
 ±0.20  | 
 1.329  | 
| 
 38  | 
 38.10  | 
 ±0.25  | 
 1.80  | 
 ±0.20  | 
 1.611  | 
| 
 51  | 
 50.80  | 
 ±O.30  | 
 2.00  | 
 ±0.24  | 
 2.407  | 
| 
 64  | 
 63.50  | 
 ±O.30  | 
 2.50  | 
 ±0.30  | 
 3.760  | 
| 
 76  | 
 76.20  | 
 ±O.30  | 
 3.20  | 
 士O.35  | 
 5.761  | 
						
  | ||