Pipe2-1/2XXS 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.

Pipe2-1/2XXS has a 2 7/8 in. outside diameter and a 9/16 in. nominal wall.

Also known as NPS 2-1/2 pipe (2-1/2 in. nominal), double-extra strong (XXS) wall.

At 13.7 lb per foot it is the heaviest of the 6 Pipe2 sizes, which run from 3.66 to 13.7 lb/ft.

For strong-axis bending its section modulus is Sx = 1.94 in³ and its moment of inertia Ix = 2.78 in⁴, with a plastic modulus Zx = 2.91 in³.

Detailing dimensions

Outside diameter2 7/8"
Nominal wall (t)9/16"

Section properties

Weight13.7 lb/ft
Area (A)3.83 in²
Ix2.78 in⁴
Sx1.94 in³
Zx2.91 in³
rx0.854 in
Iy2.78 in⁴
Sy1.94 in³
Zy2.91 in³
ry0.854 in
J5.56 in⁴

Other Pipe2 sizes

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

Pipe2STDPipe2XSPipe2-1/2STDPipe2-1/2XSPipe2XXS

Similar weight pipe sizes

Comparable 13.7 lb/ft sections in other pipe sizes.

Pipe5STD14.6 lb/ft · Sx 5.14 in³Pipe3-1/2XS12.5 lb/ft · Sx 2.97 in³Pipe4XS15 lb/ft · Sx 4.05 in³Pipe4STD10.8 lb/ft · Sx 3.03 in³Pipe3XS10.3 lb/ft · Sx 2.11 in³Pipe3-1/2STD9.12 lb/ft · Sx 2.26 in³Pipe3XXS18.6 lb/ft · Sx 3.31 in³Pipe6STD19 lb/ft · Sx 7.99 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 Pipe2-1/2XXS cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing