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The ASTM A53 standard covers seamless and welded black and hot-dipped galvanized steel pipes. Below is a typical dimensional table for ASTM A53 seamless steel pipes.
| 
 NB  | 
 Grade B Size  | 
 OD  | 
 SCH 40S  | 
 SCH 5S  | 
 SCH 10S  | 
 SCH S10  | 
 SCH S20  | 
 SCH S40  | 
 SCH S60  | 
 SCH XS/80S  | 
 SCH S80  | 
 SCH S100  | 
 SCH S120  | 
 SCH S140  | 
 SCH S160  | 
 SCH XXS  | 
| 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
 mm  | 
||
| 
 
  | 
 1/8”  | 
 10.029  | 
 
  | 
 
  | 
 1.02  | 
 
  | 
 
  | 
 1.073  | 
 
  | 
 
  | 
 2.041  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 
  | 
 1/4”  | 
 13.072  | 
 
  | 
 
  | 
 1.07  | 
 
  | 
 
  | 
 2.024  | 
 
  | 
 
  | 
 3.002  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 
  | 
 3/8”  | 
 17.015  | 
 
  | 
 
  | 
 1.07  | 
 
  | 
 
  | 
 2.031  | 
 
  | 
 
  | 
 3.02  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 15  | 
 1/2”  | 
 21.034  | 
 2.08  | 
 1.07  | 
 2.01  | 
 
  | 
 
  | 
 2.077  | 
 
  | 
 3.073  | 
 3.073  | 
 
  | 
 
  | 
 
  | 
 4.078  | 
 7.047  | 
| 
 20  | 
 3/4”  | 
 26.067  | 
 2.09  | 
 1.07  | 
 2.01  | 
 
  | 
 
  | 
 2.087  | 
 
  | 
 3.091  | 
 3.091  | 
 
  | 
 
  | 
 
  | 
 5.056  | 
 7.082  | 
| 
 25  | 
 1”  | 
 33.04  | 
 3.04  | 
 1.07  | 
 2.08  | 
 
  | 
 
  | 
 3.038  | 
 
  | 
 4.055  | 
 4.055  | 
 
  | 
 
  | 
 
  | 
 6.035  | 
 9.009  | 
| 
 32  | 
 1 1/4”  | 
 42.016  | 
 3.06  | 
 1.07  | 
 2.08  | 
 
  | 
 
  | 
 3.056  | 
 
  | 
 4.085  | 
 4.085  | 
 
  | 
 
  | 
 
  | 
 6.035  | 
 9.07  | 
| 
 40  | 
 1 1/2”  | 
 48.026  | 
 3.07  | 
 1.07  | 
 2.08  | 
 
  | 
 
  | 
 3.068  | 
 
  | 
 5.008  | 
 5.008  | 
 
  | 
 
  | 
 
  | 
 7.014  | 
 10.02  | 
| 
 50  | 
 2”  | 
 60.033  | 
 3.09  | 
 1.07  | 
 2.08  | 
 
  | 
 
  | 
 3.091  | 
 
  | 
 5.054  | 
 5.054  | 
 
  | 
 
  | 
 
  | 
 9.074  | 
 11.01  | 
| 
 65  | 
 2 1/2”  | 
 73.003  | 
 5.02  | 
 2.01  | 
 3.01  | 
 
  | 
 
  | 
 5.016  | 
 
  | 
 7.001  | 
 7.001  | 
 
  | 
 
  | 
 
  | 
 9.053  | 
 14  | 
| 
 80  | 
 3”  | 
 88.09  | 
 5.05  | 
 2.01  | 
 3.01  | 
 
  | 
 
  | 
 5.049  | 
 
  | 
 7.062  | 
 7.062  | 
 
  | 
 
  | 
 
  | 
 11.01  | 
 15.02  | 
| 
 90  | 
 3 1/2”  | 
 101.06  | 
 5.07  | 
 2.01  | 
 3.01  | 
 
  | 
 
  | 
 5.074  | 
 
  | 
 8.008  | 
 8.008  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 100  | 
 4”  | 
 114.03  | 
 6  | 
 2.01  | 
 3.01  | 
 
  | 
 
  | 
 6.002  | 
 
  | 
 8.056  | 
 8.056  | 
 
  | 
 11.01  | 
 
  | 
 13.05  | 
 17.01  | 
| 
 125  | 
 5”  | 
 141.03  | 
 6.06  | 
 2.08  | 
 3.04  | 
 
  | 
 
  | 
 6.055  | 
 
  | 
 9.053  | 
 9.053  | 
 
  | 
 12.07  | 
 
  | 
 15.09  | 
 19.01  | 
| 
 150  | 
 6”  | 
 168.03  | 
 7.01  | 
 2.08  | 
 3.04  | 
 
  | 
 
  | 
 7.011  | 
 
  | 
 10.097  | 
 11  | 
 
  | 
 14.03  | 
 
  | 
 18.03  | 
 22  | 
| 
 200  | 
 8”  | 
 219.01  | 
 8.02  | 
 2.08  | 
 3.08  | 
 
  | 
 6.04  | 
 8.018  | 
 10.03  | 
 12.07  | 
 12.07  | 
 15.01  | 
 19.03  | 
 20.06  | 
 23  | 
 22.02  | 
| 
 250  | 
 10”  | 
 273.01  | 
 9.03  | 
 3.04  | 
 4.02  | 
 
  | 
 6.04  | 
 9.027  | 
 12.07  | 
 12.07  | 
 15.01  | 
 19.03  | 
 21.04  | 
 25.04  | 
 28.06  | 
 25.04  | 
| 
 300  | 
 12”  | 
 323.09  | 
 9.05  | 
 4  | 
 4.06  | 
 
  | 
 6.04  | 
 10.03  | 
 14.03  | 
 12.07  | 
 17.05  | 
 21.04  | 
 25.04  | 
 28.06  | 
 33.03  | 
 25.04  | 
| 
 350  | 
 14”  | 
 355.06  | 
 9.05  | 
 4  | 
 4.08  | 
 6.04  | 
 7.09  | 
 11.01  | 
 15.01  | 
 12.07  | 
 19.01  | 
 23.08  | 
 27.08  | 
 31.08  | 
 35.07  | 
 
  | 
| 
 400  | 
 16”  | 
 406.04  | 
 9.05  | 
 4.02  | 
 4.08  | 
 6.04  | 
 7.09  | 
 12.07  | 
 16.07  | 
 12.07  | 
 21.04  | 
 26.02  | 
 31  | 
 36.05  | 
 40.05  | 
 
  | 
| 
 450  | 
 18”  | 
 457.02  | 
 9.05  | 
 4.02  | 
 4.08  | 
 6.04  | 
 7.09  | 
 14.03  | 
 19.01  | 
 12.07  | 
 23.08  | 
 29.04  | 
 34.09  | 
 39.07  | 
 45.02  | 
 
  | 
| 
 500  | 
 20”  | 
 508  | 
 9.05  | 
 4.08  | 
 5.05  | 
 6.04  | 
 9.05  | 
 15.01  | 
 20.06  | 
 12.07  | 
 26.02  | 
 32.05  | 
 38.01  | 
 44.05  | 
 50  | 
 
  | 
| 
 550  | 
 22”  | 
 558.08  | 
 9.05  | 
 4.08  | 
 5.05  | 
 6.04  | 
 9.05  | 
 
  | 
 22.02  | 
 12.07  | 
 28.06  | 
 34.09  | 
 41.03  | 
 47.06  | 
 54  | 
 
  | 
| 
 600  | 
 24”  | 
 609.06  | 
 9.05  | 
 5.05  | 
 6.04  | 
 6.04  | 
 9.05  | 
 17.05  | 
 24.06  | 
 12.07  | 
 31  | 
 38.09  | 
 46  | 
 52.04  | 
 59.05  | 
 
  | 
| 
 650  | 
 26”  | 
 660.04  | 
 9.05  | 
 
  | 
 
  | 
 7.09  | 
 13  | 
 
  | 
 
  | 
 12.07  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 700  | 
 28”  | 
 711.02  | 
 9.05  | 
 
  | 
 
  | 
 7.09  | 
 13  | 
 
  | 
 
  | 
 12.07  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 750  | 
 30”  | 
 762  | 
 9.05  | 
 6.04  | 
 7.09  | 
 7.09  | 
 13  | 
 
  | 
 
  | 
 12.07  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 800  | 
 32”  | 
 812.08  | 
 9.05  | 
 
  | 
 
  | 
 7.09  | 
 13  | 
 17.05  | 
 
  | 
 12.07  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 850  | 
 34”  | 
 863.06  | 
 9.05  | 
 
  | 
 
  | 
 7.09  | 
 13  | 
 17.05  | 
 
  | 
 12.07  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
| 
 900  | 
 36”  | 
 914.04  | 
 9.05  | 
 
  | 
 
  | 
 7.09  | 
 13  | 
 19.01  | 
 
  | 
 12.07  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  | 
 
  |