Pipe20STD 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.

Pipe20STD has a 20 in. outside diameter and a 3/8 in. nominal wall.

Also known as NPS 20 pipe (20 in. nominal), standard weight (STD) wall.

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

For strong-axis bending its section modulus is Sx = 104 in³ and its moment of inertia Ix = 1040 in⁴, with a plastic modulus Zx = 135 in³.

Detailing dimensions

Outside diameter20"
Nominal wall (t)3/8"

Section properties

Weight78.7 lb/ft
Area (A)21.6 in²
Ix1040 in⁴
Sx104 in³
Zx135 in³
rx6.95 in
Iy1040 in⁴
Sy104 in³
Zy135 in³
ry6.95 in
J2090 in⁴

Other Pipe20 sizes

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

Pipe20XS

Similar weight pipe sizes

Comparable 78.7 lb/ft sections in other pipe sizes.

Pipe16XS82.9 lb/ft · Sx 83.1 in³Pipe8XXS72.5 lb/ft · Sx 35.8 in³Pipe14XS72.2 lb/ft · Sx 62.9 in³Pipe18STD70.7 lb/ft · Sx 84 in³Pipe12XS65.5 lb/ft · Sx 53.2 in³Pipe18XS93.5 lb/ft · Sx 106 in³Pipe24STD94.7 lb/ft · Sx 152 in³Pipe16STD62.6 lb/ft · Sx 65.9 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 Pipe20STD cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing