Dimensions of Steel Pipes ASME B36.10 and B36.19 suffix (S)

OTHER DIMENSIONS

6-14
NPS 6 8 10 12 14
OD 168.3 219 273 323.9 355.6
  Wall Thickness
Sch 5 2.77 2.77 3.40 3.96 3.96
Sch 5S 2.77 2.77 3.40 3.96 3.96
Sch 10 3.40 3.76 4.19 4.57 6.35
Sch 10S 3.40 3.76 4.19 4.57 4.78
Sch 20   6.35 6.35 6.35 7.92
Sch 30   7.04 7.80 8.38 9.53
STD 7.11 8.18 9.27 9.53 9.53
Sch 40 7.11 8.18 9.27 10.31 11.13
Sch 40S 7.11 8.18 9.27 9.53 9.53
Sch 60   10.31 12.70 14.27 15.06
XS 10.97 12.70 12.70 12.70 12.70
Sch 80 10.97 12.70 15.09 17.48 19.05
Sch 80S 10.97 12.70 12.70 12.70 12.70
Sch 100   15.09 18.26 21.44 23.83
Sch 120 14.27 18.26 21.44 25.40 27.79
Sch 140   20.62 25.40 28.58 31.75
XXS 21.95 22.23 25.40 25.40  
Sch 160 18.26 23.01 28.58 33.32 35.71

NPS = Nominal Pipe Size   O.D. = Outside Diameter
Dimensions are in millimeters unless otherwise indicated.



Dimensional Tolerances for Seamless and Welded Pipes ASTM A530

Nominal pipe size

up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / - 0.79 mm

10 thru 18 = + 2.37 mm / - 0.79 mm | 20 thru 24 = + 3.18 mm / - 0.79 mm

Wall Thickness

All Diameters = - 12.5%

+ tolerance not specified

Length

+ 6.40 mm / - 0 mm

Weight

+ 10% / - 1.5%



Dimensions and Dimensional Tolerances

Units of Measure
American pipe standards use imperial and metric (SI) units for measurement. It is important not to combine the use of these units since rounding of dimensions has resulted in an incompatibility between some values.

Dimensions
Standard dimensions for welded and seamless wrought steel pipe for high or low temperatures and pressures are described in ASME B36.10. Standard dimensions for welded and seamless wrought stainless steel pipe are described in ASME B36.19. The suffix "S" in the Schedule Number is used to differentiate B36.19 pipe from B36.10 pipe. ASME B36.10 includes other pipe thicknesses which are also commercially available with stainless steel material.

Dimensional tolerances
The basic permissible variations, including pipe length and straightness requirements, are defined in ASTM A530, this standard being referenced by all ASTM pipe standards.



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