Pipe12XXS 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.

Pipe12XXS has a 12 3/4 in. outside diameter and a 1 in. nominal wall.

Also known as NPS 12 pipe (12 in. nominal), double-extra strong (XXS) wall.

At 126 lb per foot it is the heaviest of the 3 Pipe12 sizes, which run from 49.6 to 126 lb/ft.

For strong-axis bending its section modulus is Sx = 97.6 in³ and its moment of inertia Ix = 625 in⁴, with a plastic modulus Zx = 134 in³.

Detailing dimensions

Outside diameter12 3/4"
Nominal wall (t)1"

Section properties

Weight126 lb/ft
Area (A)35.4 in²
Ix625 in⁴
Sx97.6 in³
Zx134 in³
rx4.2 in
Iy625 in⁴
Sy97.6 in³
Zy134 in³
ry4.2 in
J1250 in⁴

Other Pipe12 sizes

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

Pipe12STDPipe12XS

Similar weight pipe sizes

Comparable 126 lb/ft sections in other pipe sizes.

Pipe24XS126 lb/ft · Sx 192 in³Pipe26XS136 lb/ft · Sx 227 in³Pipe20XS104 lb/ft · Sx 132 in³Pipe10XXS104 lb/ft · Sx 65.6 in³Pipe26STD103 lb/ft · Sx 178 in³Pipe24STD94.7 lb/ft · Sx 152 in³Pipe18XS93.5 lb/ft · Sx 106 in³Pipe16XS82.9 lb/ft · Sx 83.1 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 Pipe12XXS cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Pipe · Steel Beam Size Chart

Interactive drawing