Steel Pipe Size Chart and Schedules

This steel pipe size chart provides a quick reference for nominal pipe sizes, schedules, wall thickness, and weight per foot. It supports specification checks, quoting accuracy, and day‑to‑day distributor use. A printable PDF version is available below.

VIEW PIPE CHART (PDF)

Commonly Stocked Steel Pipe Sizes and Schedules

Reference dimensions for nominal pipe sizes 1/2″ through 8″ across commonly stocked schedules. Wall thickness and weight per foot are shown for quick comparison.

For the complete grid with expanded schedules and sizes through 36″, download the printable pipe chart.

Understanding Steel Pipe Sizes and Schedules

Nominal Pipe Size (NPS)

Nominal Pipe Size is a standard naming system. NPS does not equal the actual outside diameter, which allows fittings to remain consistent across schedules.

Outside Diameter and Schedule

Outside diameter stays the same for a given NPS. As schedule increases, wall thickness increases and inside diameter decreases.

What Pipe Schedule Means

Pipe schedule is the standard designation that defines wall thickness for a given nominal pipe size. As schedule increases, wall thickness increases while outside diameter remains constant.

Schedule 40 vs Schedule 80

Schedule 40 is common for structural and low‑pressure use. Schedule 80 has a thicker wall and higher weight per foot for higher pressure applications.

Why Weight per Foot Matters

Weight per foot affects freight cost, handling, and branch storage. Comparing weights helps distributors estimate landed cost and plan mixed loads.

Manufacturer and Standards References

Industry specifications and manufacturer documentation support pipe schedule definitions.

• Wheatland Tube – ASTM A53 Grade B Type F technical reference (PDF)

Related Steel Pipe Resources

• Our steel pipe products
• Our standards and specifications guide