Pipe3-1/2XS 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.

Pipe3-1/2XS has a 4 in. outside diameter and a 5/16 in. nominal wall.

Also known as NPS 3-1/2 pipe (3-1/2 in. nominal), Schedule 80 (XS) wall.

At 12.5 lb per foot it is one of the 7 Pipe3 sizes, which run from 1.13 to 18.6 lb/ft.

For strong-axis bending its section modulus is Sx = 2.97 in³ and its moment of inertia Ix = 5.94 in⁴, with a plastic modulus Zx = 4.07 in³.

Detailing dimensions

Outside diameter4"
Nominal wall (t)5/16"

Section properties

Weight12.5 lb/ft
Area (A)3.43 in²
Ix5.94 in⁴
Sx2.97 in³
Zx4.07 in³
rx1.31 in
Iy5.94 in⁴
Sy2.97 in³
Zy4.07 in³
ry1.31 in
J11.9 in⁴

Other Pipe3 sizes

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

Pipe3/4STDPipe3/4XSPipe3STDPipe3-1/2STDPipe3XSPipe3XXS

Similar weight pipe sizes

Comparable 12.5 lb/ft sections in other pipe sizes.

Pipe2-1/2XXS13.7 lb/ft · Sx 1.94 in³Pipe4STD10.8 lb/ft · Sx 3.03 in³Pipe5STD14.6 lb/ft · Sx 5.14 in³Pipe4XS15 lb/ft · Sx 4.05 in³Pipe2XXS9.04 lb/ft · Sx 1.07 in³Pipe2-1/2XS7.67 lb/ft · Sx 1.27 in³Pipe6STD19 lb/ft · Sx 7.99 in³Pipe2-1/2STD5.8 lb/ft · Sx 1.01 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 Pipe3-1/2XS cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing