The steel pipe data chart below can be used to find pipe sizes, diameters, wall thickness, working pressures and more The chart is based on ASME/ANSI B 36.10 Welded and Seamless Wrought Steel Pipe and ASME/ANSI B36.19 Stainless Steel Pipe.
Regardless of schedule number, pipes of a particular size all have the same outside diameter (not withstanding manufacturing tolerances). As the schedule number increases, the wall thickness increases, and the actual bore is reduced. For example:
A 4 inches (100 mm) Schedule 40 pipe has an outside diameter of 4.500 inches (114.30 mm), a wall thickness of 0.237 inches (6.02 mm), giving a bore of 4.026 inches (102.26 mm)
A 4 inches (100 mm) Schedule 80 pipe has an outside diameter of 4.500 inches ( 114.30 mm), a wall thickness of 0.337 inches (8.56 mm), giving a bore of 3.826 inches (97.18 mm)
Outside Diameter, Identification, Wall Thickness, Inside Diameter
Area of Metal, Transverse Internal Area, Moment of Inertia, Weight Pipe, Weight Water, External Surface, Elastic Section Modulus
Pipe Size (inches)Outside Diameter (inches)IdentificationWall Thickness – t – (inches)Inside Diameter – d – (inches)SteelStainless Steel Schedule No.Iron Pipe SizeSchedule No.1/80.405. STD XS. 40 8010S 40S 80S0.049 0.068 0.0950.307 0.269 0.2151/40.540. STD XS. 40 8010S 40S 80S0.065 0.088 0.1190.410 0.364 0.3023/80.675. STD XS. 40 8010S 40S 80S0.065 0.091 0.1260.545 0.493 0.4231/20.840. . STD XS . XXS. . 40 80 160 .5S 10S 40S 80S . .0.065 0.083 0.109 0.147 0.187 0.2940.710 0.674 0.622 0.546 0.466 0.2523/4 1.050. . STD XS . XXS. . 40 80 160 .5S 10S 40S 80S . .0.065 0.083 0.113 0.154 0.219 0.3080.920 0.884 0.824 0.742 0.612 0.43411.315. . STD XS . XXS. . 40 80 160 .5S 10S 40S 80S . .0.065 0.109 0.133 0.179 0.250 0.3581.185 1.097 1.049 0.957 0.815 0.5991 1/41.660. . STD XS . XXS. . 40 80 160 .5S 10S 40S 80S . .0.065 0.109 0.140 0.191 0.250 0.3821.530 1.442 1.380 1.278 1.160 0.8961 1/21.900. . STD XS . XXS. . 40 80 160 .5S 10S 40S 80S . .0.065 0.109 0.145 0.200 0.281 0.4001.770 1.682 1.610 1.500 1.338 1.10022.375. . STD XS . XXS. . 40 80 160 .5S 10S 40S 80S . .0.065 0.109 0.154 0.218 0.344 0.4362.245 2.157 2.067 1.939 1.687 1.503
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