Comprehensive Pipe Schedule Chart in mm and inch
Use the interactive tool for quick lookups, then reference the full NPS 1/8 to 24 chart below for SCH 10, 20, 40, 80, 160, and XXS wall thickness data based on ASME B36.10M and ASME B36.19M conventions.
Chọn kích thước ống và schedule
STD = Sch 40 (NPS <= 10"), XS = Sch 80 (NPS <= 8"), XXS ~ Sch 160 (NPS <= 8")
2" Pipe - Sch 40
Đường kính ngoài (OD)
2.374 in
Độ dày thành
0.154 in
Đường kính trong (ID)
2.066 in
Trọng lượng/ft
3.65 lb/ft
Bảng tham chiếu Sch 40
| NPS | OD (in) | Độ dày (in) | ID (in) | Trọng lượng (lb/ft) |
|---|---|---|---|---|
| 1/8" | 0.406 | 0.068 | 0.269 | 0.25 |
| 1/4" | 0.539 | 0.088 | 0.363 | 0.43 |
| 3/8" | 0.673 | 0.091 | 0.491 | 0.57 |
| 1/2" | 0.839 | 0.109 | 0.620 | 0.85 |
| 3/4" | 1.051 | 0.113 | 0.825 | 1.13 |
| 1" | 1.315 | 0.133 | 1.049 | 1.68 |
| 1-1/4" | 1.661 | 0.140 | 1.381 | 2.28 |
| 1-1/2" | 1.902 | 0.145 | 1.612 | 2.72 |
| 2" | 2.374 | 0.154 | 2.066 | 3.65 |
| 2-1/2" | 2.874 | 0.203 | 2.468 | 5.80 |
| 3" | 3.500 | 0.216 | 3.068 | 7.59 |
| 4" | 4.500 | 0.237 | 4.026 | 10.80 |
| 6" | 6.626 | 0.280 | 6.066 | 18.99 |
| 8" | 8.626 | 0.322 | 7.982 | 28.59 |
| 10" | 10.748 | 0.365 | 10.018 | 40.51 |
| 12" | 12.748 | 0.406 | 11.936 | 53.55 |
| 14" | 14.000 | 0.438 | 13.124 | 63.53 |
| 16" | 16.000 | 0.500 | 15.000 | 82.85 |
| 18" | 17.992 | 0.562 | 16.869 | 104.68 |
| 20" | 20.000 | 0.594 | 18.812 | 123.24 |
| 24" | 24.016 | 0.688 | 22.639 | 171.61 |
* Kích thước theo ASME B36.10M/B36.19M. Trọng lượng tính với mật độ 0.283 lb/in^3.
Complete Pipe Schedule Chart Reference
This reference table is designed for engineers, buyers, and estimators who need to compare outside diameter and common wall-thickness series in one place. XXS is shown where commonly referenced in project and procurement practice. Always confirm mill tolerance and project specification before release for fabrication.
| NPS | OD (in) | OD (mm) | SCH 10 | SCH 20 | SCH 40 | SCH 80 | SCH 160 | XXS |
|---|---|---|---|---|---|---|---|---|
| 1/8" | 0.406 | 10.31 | 0.049 in / 1.24 mm | — | 0.068 in / 1.73 mm | 0.095 in / 2.41 mm | — | — |
| 1/4" | 0.539 | 13.69 | 0.065 in / 1.65 mm | — | 0.088 in / 2.24 mm | 0.119 in / 3.02 mm | — | — |
| 3/8" | 0.673 | 17.09 | 0.065 in / 1.65 mm | — | 0.091 in / 2.31 mm | 0.126 in / 3.20 mm | — | — |
| 1/2" | 0.839 | 21.31 | 0.083 in / 2.11 mm | — | 0.109 in / 2.77 mm | 0.147 in / 3.73 mm | 0.188 in / 4.78 mm | 0.188 in / 4.78 mm |
| 3/4" | 1.051 | 26.70 | 0.083 in / 2.11 mm | — | 0.113 in / 2.87 mm | 0.154 in / 3.91 mm | 0.219 in / 5.56 mm | 0.219 in / 5.56 mm |
| 1" | 1.315 | 33.40 | 0.109 in / 2.77 mm | — | 0.133 in / 3.38 mm | 0.179 in / 4.55 mm | 0.250 in / 6.35 mm | 0.250 in / 6.35 mm |
| 1-1/4" | 1.661 | 42.19 | 0.109 in / 2.77 mm | — | 0.140 in / 3.56 mm | 0.191 in / 4.85 mm | 0.250 in / 6.35 mm | 0.250 in / 6.35 mm |
| 1-1/2" | 1.902 | 48.31 | 0.109 in / 2.77 mm | — | 0.145 in / 3.68 mm | 0.200 in / 5.08 mm | 0.281 in / 7.14 mm | 0.281 in / 7.14 mm |
| 2" | 2.374 | 60.30 | 0.109 in / 2.77 mm | — | 0.154 in / 3.91 mm | 0.218 in / 5.54 mm | 0.344 in / 8.74 mm | 0.344 in / 8.74 mm |
| 2-1/2" | 2.874 | 73.00 | 0.120 in / 3.05 mm | — | 0.203 in / 5.16 mm | 0.276 in / 7.01 mm | 0.375 in / 9.52 mm | 0.375 in / 9.52 mm |
| 3" | 3.500 | 88.90 | 0.120 in / 3.05 mm | — | 0.216 in / 5.49 mm | 0.300 in / 7.62 mm | 0.438 in / 11.13 mm | 0.438 in / 11.13 mm |
| 4" | 4.500 | 114.30 | 0.120 in / 3.05 mm | — | 0.237 in / 6.02 mm | 0.337 in / 8.56 mm | 0.531 in / 13.49 mm | 0.531 in / 13.49 mm |
| 6" | 6.626 | 168.30 | 0.134 in / 3.40 mm | — | 0.280 in / 7.11 mm | 0.432 in / 10.97 mm | 0.719 in / 18.26 mm | 0.719 in / 18.26 mm |
| 8" | 8.626 | 219.10 | 0.148 in / 3.76 mm | 0.250 in / 6.35 mm | 0.322 in / 8.18 mm | 0.500 in / 12.70 mm | 0.906 in / 23.01 mm | 0.906 in / 23.01 mm |
| 10" | 10.748 | 273.00 | 0.165 in / 4.19 mm | 0.250 in / 6.35 mm | 0.365 in / 9.27 mm | 0.594 in / 15.09 mm | 1.125 in / 28.57 mm | — |
| 12" | 12.748 | 323.80 | 0.180 in / 4.57 mm | 0.250 in / 6.35 mm | 0.406 in / 10.31 mm | 0.688 in / 17.48 mm | 1.312 in / 33.32 mm | — |
| 14" | 14.000 | 355.60 | 0.250 in / 6.35 mm | 0.312 in / 7.92 mm | 0.438 in / 11.13 mm | 0.750 in / 19.05 mm | 1.406 in / 35.71 mm | — |
| 16" | 16.000 | 406.40 | 0.250 in / 6.35 mm | 0.312 in / 7.92 mm | 0.500 in / 12.70 mm | 0.844 in / 21.44 mm | 1.594 in / 40.49 mm | — |
| 18" | 17.992 | 457.00 | 0.250 in / 6.35 mm | 0.312 in / 7.92 mm | 0.562 in / 14.27 mm | 0.938 in / 23.83 mm | 1.781 in / 45.24 mm | — |
| 20" | 20.000 | 508.00 | 0.250 in / 6.35 mm | 0.375 in / 9.52 mm | 0.594 in / 15.09 mm | 1.031 in / 26.19 mm | 1.969 in / 50.01 mm | — |
| 24" | 24.016 | 610.01 | 0.250 in / 6.35 mm | 0.375 in / 9.52 mm | 0.688 in / 17.48 mm | 1.219 in / 30.96 mm | 2.344 in / 59.54 mm | — |
What is pipe schedule?
Pipe schedule is the standardized wall-thickness designation paired with nominal pipe size. ASME B36.10M covers common carbon steel and alloy steel dimensional series, while ASME B36.19M covers stainless steel S-series dimensions. Because outside diameter stays fixed for a given NPS, increasing schedule makes the wall thicker and the inside diameter smaller.
How to read the chart
- Pick the NPS row that matches the line size on your isometric or datasheet.
- Confirm the fixed outside diameter in inch or mm.
- Move across to the required schedule column to read wall thickness.
- Use wall thickness to verify fit-up with fittings, pressure capability, and approximate weight.
Pipe Schedule vs Pipe Class
| Term | What it means | Typical example |
|---|---|---|
| Pipe schedule | Wall thickness for a specific NPS | SCH 40, SCH 80, SCH 160 |
| Pipe class | Project-level piping specification | Material, rating, temperature, NDE, corrosion allowance |
| Standards link | Dimensional standards | ASME B36.10M / B36.19M |
| Procurement impact | Affects fit-up and weight | Affects the full piping bill of materials |
Carbon Steel vs Stainless Steel Schedule Differences
Carbon steel pipe is usually referenced by plain schedule numbers such as SCH 40 or SCH 80 under ASME B36.10M. Stainless steel pipe often uses S-series designations such as 10S, 40S, and 80S under ASME B36.19M. Some dimensions overlap closely, but they are not interchangeable by assumption. When sourcing stainless pipe and butt-weld fittings together, confirm both the schedule designation and the governing standard before issuing an RFQ.
Pipe Schedule Chart FAQ
What does pipe schedule mean?
Pipe schedule is a wall-thickness designation used with NPS pipe sizes. A higher schedule generally means a thicker wall, smaller inside diameter, and higher pressure capability for the same outside diameter.
What standards define carbon steel and stainless steel pipe schedules?
ASME B36.10M is commonly used for carbon steel and alloy steel welded or seamless pipe, while ASME B36.19M is used for stainless steel pipe dimensions such as 10S, 40S, and 80S.
How do I read a pipe schedule chart in mm?
Start with the NPS row, confirm the outside diameter in inch or mm, then move across to the required schedule column. The chart wall thickness determines the inside diameter, weight, and fitting compatibility.
Is pipe schedule the same as pipe class?
No. Pipe schedule describes wall thickness for a given NPS. Pipe class is a broader engineering specification that may include pressure rating, material grade, corrosion allowance, temperature limits, branch reinforcement, and testing requirements.
Why do stainless steel schedules use 10S, 40S, and 80S?
The S-series comes from ASME B36.19M for stainless steel pipe. Many sizes align closely with carbon steel schedules, but buyers should still verify the exact schedule designation before matching pipe, fittings, and flanges.
Lưu ý: Bảng này là dữ liệu tham khảo theo ASME B36.10M/B36.19M. Luôn kiểm tra kích thước và trọng lượng với tiêu chuẩn mới nhất và datasheet của nhà sản xuất.