Pipe20XS pipe

Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.

Pipe20XS has a 20 in. outside diameter and a 1/2 in. nominal wall.

Also known as NPS 20 pipe (20 in. nominal), extra strong (XS) wall.

At 104 lb per foot it is the heaviest of the 2 Pipe20 sizes, which run from 78.7 to 104 lb/ft.

For strong-axis bending its section modulus is Sx = 132 in³ and its moment of inertia Ix = 1320 in⁴, with a plastic modulus Zx = 172 in³.

Detailing dimensions

Outside diameter20"
Nominal wall (t)1/2"

Section properties

Weight104 lb/ft
Area (A)27.6 in²
Ix1320 in⁴
Sx132 in³
Zx172 in³
rx6.91 in
Iy1320 in⁴
Sy132 in³
Zy172 in³
ry6.91 in
J2640 in⁴

Other Pipe20 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

Pipe20STD

Similar weight pipe sizes

Comparable 104 lb/ft sections in other pipe sizes.

Pipe10XXS104 lb/ft · Sx 65.6 in³Pipe26STD103 lb/ft · Sx 178 in³Pipe24STD94.7 lb/ft · Sx 152 in³Pipe18XS93.5 lb/ft · Sx 106 in³Pipe16XS82.9 lb/ft · Sx 83.1 in³Pipe24XS126 lb/ft · Sx 192 in³Pipe12XXS126 lb/ft · Sx 97.6 in³Pipe8XXS72.5 lb/ft · Sx 35.8 in³

Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need Pipe20XS cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing