ASME B36.10 Carbon Steel Pipe Dimensions: Schedule 40, 80 & Weight Chart

Standard ASME B36.10M carbon steel pipe dimensions: nominal pipe size (NPS), outside diameter (OD), Schedule 10 to XXS wall thickness, and weight calculation formulas.

• Nominal pipe size (NPS), outside diameter, wall thickness schedule (SCH 10 to XXS), and weight calculation guide per ASME B36.10M.
• Key figure: NPS coverage: NPS 1/8 (10.3 mm OD) to NPS 80 (2032 mm OD)
• Key figure: Schedules: SCH 10, 20, 30, STD, 40, 60, XS, 80, 100, 120, 140, 160, XXS
• Key figure: Theoretical weight formula: W (kg/m) = 0.02466 × (D − t) × t
• Key figure: Standard export lengths: 6 m (19.7 ft) and 12 m (39.4 ft) with beveled ends
• Understanding ASME B36.10M Standard: ASME B36.10M is the global engineering standard covering the dimensions, outside diameters, wall thicknesses, and theoretical weights of welded and seamless wrought steel pipes. Whether ordering ASTM A106 Gr.B, ASTM A53, or API 5L line pipe, ASME B36.10 establishes the universal sizing nomenclature used by engineers, fabricators, and procurement teams worldwide.
• NPS, DN, and Actual Outside Diameter: Nominal Pipe Size (NPS in inches) and Diameter Nominal (DN in millimeters) designate pipe diameter without specifying exact OD. For NPS 1/8 through NPS 12, the actual OD is larger than the nominal size (e.g., NPS 4 has an actual OD of 4.500 inches / 114.3 mm; NPS 8 has an OD of 8.625 inches / 219.1 mm). For NPS 14 (DN 350) and larger, the actual outside diameter equals the nominal size in inches (e.g., NPS 24 has an OD of exactly 24.000 inches / 610.0 mm).
• Pipe Schedules Explained: STD, XS, SCH 40, and SCH 80: The term "Schedule" (SCH) defines wall thickness. Higher schedule numbers indicate thicker walls for higher pressure containment. Schedule 40 is standard wall (STD) up to NPS 10; Schedule 80 is extra strong (XS) up to NPS 8. For large diameter pipes (NPS 14 to NPS 80), STD wall is standardized at 0.375 in (9.53 mm) and XS is 0.500 in (12.70 mm).