Pipe8XXS 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.

Pipe8XXS has a 8 5/8 in. outside diameter and a 7/8 in. nominal wall.

Also known as NPS 8 pipe (8 in. nominal), double-extra strong (XXS) wall.

At 72.5 lb per foot it is the heaviest of the 3 Pipe8 sizes, which run from 28.6 to 72.5 lb/ft.

For strong-axis bending its section modulus is Sx = 35.8 in³ and its moment of inertia Ix = 154 in⁴, with a plastic modulus Zx = 49.9 in³.

Detailing dimensions

Outside diameter8 5/8"
Nominal wall (t)7/8"

Section properties

Weight72.5 lb/ft
Area (A)20 in²
Ix154 in⁴
Sx35.8 in³
Zx49.9 in³
rx2.78 in
Iy154 in⁴
Sy35.8 in³
Zy49.9 in³
ry2.78 in
J308 in⁴

Other Pipe8 sizes

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

Pipe8STDPipe8XS

Similar weight pipe sizes

Comparable 72.5 lb/ft sections in other pipe sizes.

Pipe14XS72.2 lb/ft · Sx 62.9 in³Pipe18STD70.7 lb/ft · Sx 84 in³Pipe20STD78.7 lb/ft · Sx 104 in³Pipe12XS65.5 lb/ft · Sx 53.2 in³Pipe16STD62.6 lb/ft · Sx 65.9 in³Pipe16XS82.9 lb/ft · Sx 83.1 in³Pipe10XS54.8 lb/ft · Sx 37 in³Pipe14STD54.6 lb/ft · Sx 50 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 Pipe8XXS cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing