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Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing.
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Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
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This stainless steel pipe size and weight chart provides reference data for common NPS and DN sizes, outside diameters, wall thicknesses, and theoretical weights. The dimensional data is based on ASME B36.19M, covering standard stainless steel pipe sizes and schedules, while weight values are calculated using a stainless steel density of 7.93 g/cm³.
The chart below lists stainless steel pipe sizes and wall thicknesses by NPS, DN, and Schedule, based on ASME B36.19M-2018. All dimensions are in millimeters (mm); “—” indicates no listed standard wall thickness.
| NPS | DN | Outside Diameter (mm) | Sch 5S Wall Thickness (mm) | Sch 10S Wall Thickness (mm) | Sch 40S Wall Thickness (mm) | Sch 80S Wall Thickness (mm |
|---|---|---|---|---|---|---|
| 1/8" | 6 | 10.3 | — | 1.24 | 1.73 | 2.41 |
| 1/4" | 8 | 13.7 | — | 1.65 | 2.24 | 3.02 |
| 3/8" | 10 | 17.1 | — | 1.65 | 2.31 | 3.20 |
| 1/2" | 15 | 21.3 | 1.65 | 2.11 | 2.77 | 3.75 |
| 3/4" | 20 | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 |
| 1" | 25 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 1-1/4" | 32 | 42.2 | 1.65 | 2.77 | 3.56 | 4.85 |
| 1-1/2" | 40 | 48.3 | 1.65 | 2.77 | 3.68 | 5.08 |
| 2" | 50 | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 |
| 2-1/2" | 65 | 73.0 | 2.11 | 3.05 | 5.16 | 7.01 |
| 3" | 80 | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
| 3-1/2" | 90 | 101.6 | 2.11 | 3.05 | 5.74 | 8.08 |
| 4" | 100 | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
| 5" | 125 | 141.3 | 2.77 | 3.40 | 6.55 | 9.53 |
| 6" | 150 | 168.3 | 2.77 | 3.40 | 7.11 | 10.97 |
| 8" | 200 | 219.1 | 2.77 | 3.76 | 8.18 | 12.70 |
| 10" | 250 | 273.1 | 3.40 | 4.19 | 9.27 | 12.70 |
| 12" | 300 | 323.9 | 3.96 | 4.57 | 9.53 | 12.70 |
| 14" | 350 | 355.6 | 3.96 | 4.78 | 9.53 | 12.70 |
| 16" | 400 | 406.4 | 4.19 | 4.78 | 9.53 | 12.70 |
| 18" | 450 | 457.2 | 4.19 | 4.78 | 9.53 | 12.70 |
| 20" | 500 | 508.0 | 4.78 | 5.54 | 9.53 | 12.70 |
| 24" | 600 | 609.6 | 5.54 | 6.35 | 9.53 | 12.70 |
The following chart shows the theoretical weight of stainless steel pipes in kg/m, calculated using a density of 7.93 g/cm³.
| NPS | DN | Sch 5S (kg/m) | Sch 10S (kg/m) | Sch 40S (kg/m) | Sch 80S (kg/m) |
|---|---|---|---|---|---|
| 1/8" | 6 | — | 0.28 | 0.37 | 0.51 |
| 1/4" | 8 | — | 0.49 | 0.64 | 0.84 |
| 3/8" | 10 | — | 0.63 | 0.85 | 1.12 |
| 1/2" | 15 | 0.81 | 1.01 | 1.28 | 1.68 |
| 3/4" | 20 | 1.03 | 1.29 | 1.70 | 2.24 |
| 1" | 25 | 1.30 | 2.11 | 2.51 | 3.25 |
| 1-1/4" | 32 | 1.66 | 2.72 | 3.40 | 4.48 |
| 1-1/2" | 40 | 1.91 | 3.12 | 4.07 | 5.43 |
| 2" | 50 | 2.40 | 3.94 | 5.49 | 7.50 |
| 2-1/2" | 65 | 3.69 | 5.27 | 8.66 | 11.44 |
| 3" | 80 | 4.52 | 6.47 | 11.32 | 15.30 |
| 3-1/2" | 90 | 5.18 | 7.42 | 13.58 | 18.66 |
| 4" | 100 | 5.84 | 8.37 | 16.09 | 22.34 |
| 5" | 125 | 9.47 | 11.57 | 21.80 | 30.99 |
| 6" | 150 | 11.32 | 13.84 | 28.28 | 42.59 |
| 8" | 200 | 14.80 | 19.98 | 42.63 | 64.67 |
| 10" | 250 | 22.66 | 27.81 | 60.92 | 83.27 |
| 12" | 300 | 31.28 | 36.03 | 74.07 | 97.55 |
| 14" | 350 | 34.39 | 41.33 | 81.38 | 105.88 |
| 16" | 400 | 41.60 | 47.33 | 93.33 | 121.72 |
| 18" | 450 | 46.85 | 53.48 | 105.42 | 137.56 |
| 20" | 500 | 59.32 | 68.79 | 117.51 | 153.40 |
| 24" | 600 | 82.57 | 94.57 | 142.61 | 185.08 |
Stainless steel pipe dimensions are commonly specified using NPS, DN, OD, WT, and Schedule. Each term describes a different aspect of the pipe.
Note: Data is for general reference. Dimensional values are based on ASME B36.19M; verify against the applicable specification before ordering. Theoretical weights assume a stainless steel density of 7.93 g/cm³ (for other grades such as Type 316, see Section 4).
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