Pipe3-1/2STD 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.

Pipe3-1/2STD has a 4 in. outside diameter and a 1/4 in. nominal wall.

Also known as NPS 3-1/2 pipe (3-1/2 in. nominal), Schedule 40 (STD) wall.

At 9.12 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 = 2.26 in³ and its moment of inertia Ix = 4.52 in⁴, with a plastic modulus Zx = 3.03 in³.

Detailing dimensions

Outside diameter4"
Nominal wall (t)1/4"

Section properties

Weight9.12 lb/ft
Area (A)2.5 in²
Ix4.52 in⁴
Sx2.26 in³
Zx3.03 in³
rx1.34 in
Iy4.52 in⁴
Sy2.26 in³
Zy3.03 in³
ry1.34 in
J9.04 in⁴

Other Pipe3 sizes

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

Pipe3/4STDPipe3/4XSPipe3STDPipe3XSPipe3-1/2XSPipe3XXS

Similar weight pipe sizes

Comparable 9.12 lb/ft sections in other pipe sizes.

Pipe2XXS9.04 lb/ft · Sx 1.07 in³Pipe2-1/2XS7.67 lb/ft · Sx 1.27 in³Pipe4STD10.8 lb/ft · Sx 3.03 in³Pipe2-1/2STD5.8 lb/ft · Sx 1.01 in³Pipe2XS5.03 lb/ft · Sx 0.696 in³Pipe2-1/2XXS13.7 lb/ft · Sx 1.94 in³Pipe2STD3.66 lb/ft · Sx 0.528 in³Pipe5STD14.6 lb/ft · Sx 5.14 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 Pipe3-1/2STD cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing