Pipe & Tube Properties

Nom.
Pipe		 
O.D.		Schedule Number
Sizeinch102030406080100120140160XXH
1/8".405"wall in.0.0490.0570.0680.095
lbs./ft.0.190.210.240.31
1/4".540"wall in.0.0650.0730.0880.119
lbs./ft.0.330.360.430.54
3/8".675"wall in.0.0650.0730.0910.126
lbs./ft.0.420.470.570.74
1/2".840"wall in.0.0830.0950.1090.1470.1880.294
lbs./ft.0.670.760.851.091.311.72
3/4"1.050"wall in.0.0830.0950.1130.1540.2190.308
lbs./ft.0.860.971.131.481.952.44
1"1.315"wall in.0.1090.1140.1330.1790.2500.358
lbs./ft.1.411.461.682.172.853.66
1-1/4"1.660"wall in.0.1090.1170.1400.1910.2500.382
lbs./ft.1.811.932.273.003.775.22
1-1/2"1.900"wall in.0.1090.1250.1450.2000.2810.400
lbs./ft.2.092.372.723.634.866.41
2"2.375"wall in.0.1090.1250.1540.2180.3440.436
lbs./ft.2.643.013.665.037.479.04
2-1/2"2.875"wall in.0.120.1880.2030.2760.3750.552
lbs./ft.3.535.405.807.6710.0213.71
3"3.5"wall (in.)0.1200.1880.2160.3000.4380.600
lbs./ft.4.346.667.5810.2614.3418.6
3-1/2"4.0"wall (in.)0.1200.1880.2260.3180.636
lbs./ft.4.987.669.1212.5222.87
4"4.50"wall (in.)0.1200.1880.2370.3370.4380.5310.674
lbs./ft.5.628.6710.8015.0019.0222.5327.57
5"5.563"wall (in.)0.1340.2580.3750.5000.6250.750
lbs./ft.7.7814.6320.8027.0632.9938.59
6"6.625"wall (in.)0.1340.2800.4320.5620.7190.864
lbs./ft.9.3018.9928.6036.4345.3953.21
8"8.625"wall (in.)0.1480.2500.2770.3220.4060.5000.5940.7190.8120.9060.875
lbs./ft.13.4122.3824.7228.5835.6743.4351.0060.7767.8274.7672.49
10"10.75"wall (in.)0.1650.2500.3070.3650.5000.5940.7190.8441.001.1251.000
lbs./ft.18.6728.0634.2740.5254.7964.4977.1089.38104.23115.75104.23
12"12.75"wall (in.)0.1800.2500.3300.4060.5620.6880.8441.0001.1251.3121.000
lbs./ft.24.1933.4143.8153.5773.2288.71107.42125.61139.81160.42125.61
14"14"wall (in.)0.2500.3120.3750.4380.5940.7500.9381.0941.2501.406
lbs./ft.36.7545.6554.6263.5085.13106.23130.98150.93170.37189.29
16"16"wall (in.)0.2500.3120.3750.5000.6560.8441.0311.2191.4381.594
lbs./ft.42.0952.3262.6482.85107.60136.74164.98192.61223.85245.48
18"18"wall (in.)0.2500.3120.4380.5620.7500.9381.1561.3751.5621.781
lbs./ft.47.4458.9982.23104.76138.30171.08208.15244.37274.48308.79
20"20"wall (in.)0.2500.3750.5000.5940.8121.0311.2811.5001.7501.969
lbs./ft.52.7878.67104.23123.23166.56209.06256.34296.65341.41379.53
22"22"wall (in.)0.2500.3750.5000.8751.1251.3751.6251.8752.125
lbs./ft.58.1386.69114.92197.60251.05303.16353.94403.38451.49

Standard Corner Radius
for Mechanical Tube*

Tube
Diameter		 
Wall Thickness		Radius
Tolerance
inchesBWGinchesinches
1/2"to 1-1/2"220.028"1/32" to 1/16"
1/2" to 2-1/2"200.035"1/32" to 1/16"
1/2" to 4"180.049"3/64" to 5/64"
1/2" to 4-1/8"160.065"1/16" to 7/64"
3/4" to 4-1/8"140.083"5/64" to 1/8"
> 4-1/8 to 6"140.083"3/16" to 5/16"
1" to 4-1/8"130.095"3/32" to 5/32"
> 4-1/8" to 6"130.095"3/16" to 5/16"
1-1/4" to 4"120.109"1/8" to 13/64"
> 4" to 6"120.109"3/16" to 5/16"
1-1/4" to 4"110.120"1/8" to 7/32"
> 4" to 6"110.120"7/32" to 7/16"
2" to 4"100.134"5/32" to 9/32"
> 4" to 6"100.134"7/32" to 7/16"
2" to 4"90.148"3/16" to 5/16"
> 4 to 8"90.148"7/32" to 7/16"
2" to 8"80.165"1/4" to 1/2"
2" to 8"70.180"1/4" to 1/2"
2-1/2" to 4"60.203"5/16" to 9/16"
> 4" to 8"60.203"5/16" to 9/16"
2-1/2 to 8"50.220"3/8" to 5/8"
2-1/2" to 8"40.238"3/8" to 5/8"
2-1/2" to 8"30.259"3/8" to 5/8"

* For Structural Tube:
Max. Corner Radius = 3 X wall thickness

Straightness Tolerances

Mechanical Sizes:Max. 1/16" in 3 feet
Structural Sizes:Max. 1/8" x Number of feet
of total length divided by 5

Squareness of Sides

Mechanical Sizes:Max: ± b = c x 0.006"
b = Tolerance for out-of-square
c = Largest OD across flats
Structural Sizes:Adjacent sides may deviate from 90 ° by ± 2 °

Wall Thickness

Mechanical Sizes: ± 10% Nominal Wall Thickness
Structural Sizes: ± 10% Nominal Wall Thickness

Structural Tubing A 500 Requirements

RequirementGrade BGrade C
Max. Carbon0.26%0.23%
Max. Manganese--1.35%
Max. Phosphorus0.04"0.04"
Max. Sulfur0.05"0.05"
Min. Copper, when copper steel specified0.20%0.20%
Min. Tensile Strength58,000 psi.62,000 psi.
Min Yield Strength46,000 psi.50,000 psi.
Min. Elongation in 2" section23%21%

Outside Dimensions
for Mechanical Tube †

Largest
Nominal
Outside Dimension		 
 
Wall Thickness		Outside Tolerance:
all Sides at Corners
3/16" to 5/8"0.020" to 0.083"+/- 0.004"
>5/8" to 1-1/8"0.025" to 0.156"+/- 0.005"
>1-1/8" to 1-1/2"0.025" to 0.192"+/- 0.006"
>1-1/2" to 2"0.032" to 0.192"+/- 0.008'
>2" to 3"0.035" to 0.259"+/- 0.010"
>3" to 4"0.049" to 0.259"+/- 0.020"
>4" to 6"0.065" to 0.259"+/- 0.020"
>6" to 8"0.185" to 0.259"+/- 0.025"

† Measured at corner at least 2 inches from the cut end.

Outside Dimensions
for Structural Tube

Largest Outside
Dimension Across Flats
Tolerance††
2-1/2" and under+/- 0.020"
>2-1/2" to 3-1/2"+/- 0.025"
>3-1/2" to 5-1/2"+/- 0.030"
>5-1/2"+/- 1%

†† Includes allowance for convexity or concavity. For rectangular sections, tolerance calculated for the larger flat dimension applies to smaller flat dimension, but is increased 50% if the ratio of the cross-sectional dimension is 1.5 to 3.0, and 100% if the ratio exceeds 3.0

Maximum Twist – Mechanical
and Structural Tube

Largest DimensionMax. Twist in 3 ft. section
>1/2" to 1-1/2"0.050"
>1-1/2" to 2-1/2"0.062"
>2-1/2" to 4"0.075"
>4" to 6"0.087"
>6" to 8"0.100"

Convexity & Concavity
of Mechanical** Tube

Largest Nominal ODTolerance
< 2-1/2"± 0.010"
> 2-1/2" to 4"± 0.015"
> 4" to 8"± 0.025"

** For Structural Tube, Convexity/Concavity Tolerance is included in the OD tolerance.