Hereunder we're making available to our visitors some of the most common calculations and conversion tables used in the industries which we work with. We hope you find them of use.



Pipe Wall Thicknesses, Weights and Recommended Pressure Ratings

Pipe Size
(Inches)		 Wall ASA
Schedule		 Weight Recomm.
Max. WP.
Nominal O.D. Inch   Lbs/FT psi
2 2.375 0.154 40/STD 3.65 1250
2 2.375 0.218 80/XH 5.02 1250
2 1/2 2.875 0.203 40/STD 5.79 1250
2 1/2 2.875 0.276 80/XH 7.66 1250
3 3.500 0.216 40/STD 7.58 1250
4 4.500 0.188 -- 8.66 875
4 4.500 0.219 -- 10.01 1020
4 4.500 0.237 40/STD 10.79 1105
6 6.625 0.188 -- 12.92 595
6 6.625 0.219 -- 14.98 695
6 6.625 0.250 -- 17.02 790
6 6.625 0.280 40/STD 18.97 890
8 8.625 0.188 -- 16.94 460
8 8.625 0.219 -- 19.66 535
8 8.625 0.250 20 22.36 610
8 8.625 0.277 30 24.70 675
8 8.625 0.322 40/STD 28.55 785
10 10.750 0.219 -- 24.63 430
10 10.750 0.250 20 28.04 490
10 10.750 0.307 30 34.24 600
10 10.750 0.365 40/STD 40.48 715
12 12.750 0.219 -- 29.31 360
12 12.750 0.250 20 33.38 410
12 12.750 0.281 -- 37.42 465
12 12.750 0.375 STD 49.56 620
14 14.000 0.312 20 45.61 470
14 14.000 0.375 30/STD 54.57 560
16 16.000 0.312 20 52.27 410
16 16.000 0.375 30/STD 62.58 490
18 18.000 0.312 20 58.94 365
18 18.000 0.375 STD 70.59 440
Notes:
1) Recommended working pressure ratings are for reference only. Actual pressure ratings should be verified by by a qualified engineer for specific job conditions.
2) Consider wall thickness corrosion allowance when studying WP ratings.
3) For higher working pressure ratings at reduced wall thickness, Grade X-42 steel pipe or better could be an option.

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