ASME/ANSI B36.10/19 – Carbon, Alloy and Stainless Steel Pipes – Dimensions

Pipe sizes, inside and outside diameters, wall thickness, schedules, moment of inertia, transverse area, weight of pipe filled with water-U.S. Customary Units

The steel pipe data chart below can be used to find pipe sizes, diameters, wall thickness, working pressures and more The chart is based on ASME/ANSI B 36.10 Welded and Seamless Wrought Steel Pipe and ASME/ANSI B36.19 Stainless Steel Pipe.

SSAW Steel Pipe ASME B36.10

Regardless of schedule number, pipes of a particular size all have the same outside diameter (not withstanding manufacturing tolerances). As the schedule number increases, the wall thickness increases, and the actual bore is reduced. For example:

• A 4 inches (100 mm) Schedule 40 pipe has an outside diameter of 500 inches (114.30 mm), a wall thickness of 0.237 inches (6.02 mm), giving a bore of 4.026 inches (102.26 mm)
• A 4 inches (100 mm)Schedule 80 pipe has an outside diameter of 500 inches ( 114.30 mm), a wall thickness of 0.337 inches (8.56 mm), giving a bore of 3.826 inches (97.18 mm)
• Carbon, Alloy and Stainless Steel Pipes – ASME/ANSI B36.10/19 – Metric Units

 Outside Diameter, Identification, Wall Thickness, Inside Diameter

• 1 lb_m= 0.4536 kg
• 1 ft (foot) = 0.3048 m
• 1 ft²= 0.0929 m²
• 1 in²= 645.2 mm² = 6.452 cm² = 6.452×10^-4 m²
• 1 cm⁴= 10^-8 m = 10⁴ mm
• 1 in⁴= 4.16×10⁵ mm⁴ = 41.6 cm⁴
• 1 in³= 0.000016387 m³ = 16.38 cm³ = 5.78 10^-4 ft³

STD, XS and XXS

To distinguish different weights of pipe, three long standing traditional designations are used:

• standard wall – STD
• extra strong wall – XS
• double extra strong wall – XXS

The last two designations are sometimes referred to as extra heavy wall (XH), and double extra heavy wall (XXH).

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