1/2 in · DN15 · Schedule 40
- Calculated nominal ID
- 15.799 mm
- Outside diameter
- 21.336 mm
- Wall thickness
- 2.769 mm
More dimensions
- DN designation
- 15
- Schedule
- 40
- Bore area
- 196.037 mm²
- Volume per metre
- 0.196 L/m
- Material
- Steel
- NPS numeric designation
- 0.5
VALICALC · TECHNICAL REFERENCE
Pipe Size & Schedule Chart
Look up selected steel NPS/DN Schedule 40 and 80 dimensions, calculated inside diameter and bore volume. Use the bore in hydraulic calculators.
ValiCalc · Pipe Size & Schedule Chart
https://www.valicalc.com/pipe-size-chart
Dataset v1.2.0 · verified 2026-10-06
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SELECTED REFERENCE
2 in · DN50 · Schedule 40
- Calculated nominal ID
- 52.502 mm
- Outside diameter
- 60.325 mm
- Wall thickness
- 3.912 mm
All fields & cell provenance
- DN designation
- 50
- Schedule
- 40
- Bore area
- 2,164.902 mm²
- Volume per metre
- 2.165 L/m
- Material
- Steel
- NPS numeric designation
- 2
- Pipe designation: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value 2 in · DN50 · Schedule 40.
- Calculated nominal ID: Steel Schedule 40 and 80 dimensional product sheet — Derived from source inch OD and wall; actual bore tolerance not inferred · verified 2026-10-06.
- Outside diameter: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value 2.375 in.
- Wall thickness: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value 0.154 in.
- DN designation: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value 50.
- Schedule: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value 40.
- Bore area: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06.
- Volume per metre: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06.
- Material: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value Steel.
- NPS numeric designation: Steel Schedule 40 and 80 dimensional product sheet — Selected Steel product row: NPS 2 schedule 40; ID=OD−2wall from nominal/minimum dimensions · verified 2026-10-06 · source value 2.
v1.2.0 · verified 2026-10-06
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Use inside diameter for flow / velocity →Use inside diameter in Hazen-Williams →Use inside diameter in Pump TDH →Use reviewed values in pipe pressure drop →Use reviewed values in reynolds number →Use reviewed values in pipe volume →2 in · DN50 · Schedule 4052.502 mmBack to answer ↑
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18 matching rows · 18 in this subset
| Pipe designation | Calculated nominal ID | Outside diameter | Wall thickness | Actions |
|---|---|---|---|---|
| 1/2 in · DN15 · Schedule 40 | 15.799 mm | 21.336 mm | 2.769 mm | |
| 1/2 in · DN15 · Schedule 80 | 13.868 mm | 21.336 mm | 3.734 mm | |
| 3/4 in · DN20 · Schedule 40 | 20.93 mm | 26.67 mm | 2.87 mm | |
| 3/4 in · DN20 · Schedule 80 | 18.847 mm | 26.67 mm | 3.912 mm | |
| 1 in · DN25 · Schedule 40 | 26.645 mm | 33.401 mm | 3.378 mm | |
| 1 in · DN25 · Schedule 80 | 24.308 mm | 33.401 mm | 4.547 mm | |
| 1 1/4 in · DN32 · Schedule 40 | 35.052 mm | 42.164 mm | 3.556 mm | |
| 1 1/4 in · DN32 · Schedule 80 | 32.461 mm | 42.164 mm | 4.851 mm | |
| 1 1/2 in · DN40 · Schedule 40 | 40.894 mm | 48.26 mm | 3.683 mm | |
| 1 1/2 in · DN40 · Schedule 80 | 38.1 mm | 48.26 mm | 5.08 mm | |
| 2 in · DN50 · Schedule 40 | 52.502 mm | 60.325 mm | 3.912 mm | |
| 2 in · DN50 · Schedule 80 | 49.251 mm | 60.325 mm | 5.537 mm | |
| 2 1/2 in · DN65 · Schedule 40 | 62.713 mm | 73.025 mm | 5.156 mm | |
| 2 1/2 in · DN65 · Schedule 80 | 59.004 mm | 73.025 mm | 7.01 mm | |
| 3 in · DN80 · Schedule 40 | 77.927 mm | 88.9 mm | 5.486 mm | |
| 3 in · DN80 · Schedule 80 | 73.66 mm | 88.9 mm | 7.62 mm | |
| 4 in · DN100 · Schedule 40 | 102.26 mm | 114.3 mm | 6.02 mm | |
| 4 in · DN100 · Schedule 80 | 97.18 mm | 114.3 mm | 8.56 mm |
1/2 in · DN15 · Schedule 80
- Calculated nominal ID
- 13.868 mm
- Outside diameter
- 21.336 mm
- Wall thickness
- 3.734 mm
More dimensions
- DN designation
- 15
- Schedule
- 80
- Bore area
- 151.058 mm²
- Volume per metre
- 0.151 L/m
- Material
- Steel
- NPS numeric designation
- 0.5
3/4 in · DN20 · Schedule 40
- Calculated nominal ID
- 20.93 mm
- Outside diameter
- 26.67 mm
- Wall thickness
- 2.87 mm
More dimensions
- DN designation
- 20
- Schedule
- 40
- Bore area
- 344.042 mm²
- Volume per metre
- 0.344 L/m
- Material
- Steel
- NPS numeric designation
- 0.75
3/4 in · DN20 · Schedule 80
- Calculated nominal ID
- 18.847 mm
- Outside diameter
- 26.67 mm
- Wall thickness
- 3.912 mm
More dimensions
- DN designation
- 20
- Schedule
- 80
- Bore area
- 278.975 mm²
- Volume per metre
- 0.279 L/m
- Material
- Steel
- NPS numeric designation
- 0.75
1 in · DN25 · Schedule 40
- Calculated nominal ID
- 26.645 mm
- Outside diameter
- 33.401 mm
- Wall thickness
- 3.378 mm
More dimensions
- DN designation
- 25
- Schedule
- 40
- Bore area
- 557.581 mm²
- Volume per metre
- 0.558 L/m
- Material
- Steel
- NPS numeric designation
- 1
1 in · DN25 · Schedule 80
- Calculated nominal ID
- 24.308 mm
- Outside diameter
- 33.401 mm
- Wall thickness
- 4.547 mm
More dimensions
- DN designation
- 25
- Schedule
- 80
- Bore area
- 464.068 mm²
- Volume per metre
- 0.464 L/m
- Material
- Steel
- NPS numeric designation
- 1
1 1/4 in · DN32 · Schedule 40
- Calculated nominal ID
- 35.052 mm
- Outside diameter
- 42.164 mm
- Wall thickness
- 3.556 mm
More dimensions
- DN designation
- 32
- Schedule
- 40
- Bore area
- 964.974 mm²
- Volume per metre
- 0.965 L/m
- Material
- Steel
- NPS numeric designation
- 1.25
1 1/4 in · DN32 · Schedule 80
- Calculated nominal ID
- 32.461 mm
- Outside diameter
- 42.164 mm
- Wall thickness
- 4.851 mm
More dimensions
- DN designation
- 32
- Schedule
- 80
- Bore area
- 827.597 mm²
- Volume per metre
- 0.828 L/m
- Material
- Steel
- NPS numeric designation
- 1.25
1 1/2 in · DN40 · Schedule 40
- Calculated nominal ID
- 40.894 mm
- Outside diameter
- 48.26 mm
- Wall thickness
- 3.683 mm
More dimensions
- DN designation
- 40
- Schedule
- 40
- Bore area
- 1,313.436 mm²
- Volume per metre
- 1.313 L/m
- Material
- Steel
- NPS numeric designation
- 1.5
1 1/2 in · DN40 · Schedule 80
- Calculated nominal ID
- 38.1 mm
- Outside diameter
- 48.26 mm
- Wall thickness
- 5.08 mm
More dimensions
- DN designation
- 40
- Schedule
- 80
- Bore area
- 1,140.092 mm²
- Volume per metre
- 1.14 L/m
- Material
- Steel
- NPS numeric designation
- 1.5
2 in · DN50 · Schedule 40
- Calculated nominal ID
- 52.502 mm
- Outside diameter
- 60.325 mm
- Wall thickness
- 3.912 mm
More dimensions
- DN designation
- 50
- Schedule
- 40
- Bore area
- 2,164.902 mm²
- Volume per metre
- 2.165 L/m
- Material
- Steel
- NPS numeric designation
- 2
2 in · DN50 · Schedule 80
- Calculated nominal ID
- 49.251 mm
- Outside diameter
- 60.325 mm
- Wall thickness
- 5.537 mm
More dimensions
- DN designation
- 50
- Schedule
- 80
- Bore area
- 1,905.079 mm²
- Volume per metre
- 1.905 L/m
- Material
- Steel
- NPS numeric designation
- 2
2 1/2 in · DN65 · Schedule 40
- Calculated nominal ID
- 62.713 mm
- Outside diameter
- 73.025 mm
- Wall thickness
- 5.156 mm
More dimensions
- DN designation
- 65
- Schedule
- 40
- Bore area
- 3,088.869 mm²
- Volume per metre
- 3.089 L/m
- Material
- Steel
- NPS numeric designation
- 2.5
2 1/2 in · DN65 · Schedule 80
- Calculated nominal ID
- 59.004 mm
- Outside diameter
- 73.025 mm
- Wall thickness
- 7.01 mm
More dimensions
- DN designation
- 65
- Schedule
- 80
- Bore area
- 2,734.36 mm²
- Volume per metre
- 2.734 L/m
- Material
- Steel
- NPS numeric designation
- 2.5
3 in · DN80 · Schedule 40
- Calculated nominal ID
- 77.927 mm
- Outside diameter
- 88.9 mm
- Wall thickness
- 5.486 mm
More dimensions
- DN designation
- 80
- Schedule
- 40
- Bore area
- 4,769.447 mm²
- Volume per metre
- 4.769 L/m
- Material
- Steel
- NPS numeric designation
- 3
3 in · DN80 · Schedule 80
- Calculated nominal ID
- 73.66 mm
- Outside diameter
- 88.9 mm
- Wall thickness
- 7.62 mm
More dimensions
- DN designation
- 80
- Schedule
- 80
- Bore area
- 4,261.41 mm²
- Volume per metre
- 4.261 L/m
- Material
- Steel
- NPS numeric designation
- 3
4 in · DN100 · Schedule 40
- Calculated nominal ID
- 102.26 mm
- Outside diameter
- 114.3 mm
- Wall thickness
- 6.02 mm
More dimensions
- DN designation
- 100
- Schedule
- 40
- Bore area
- 8,213.057 mm²
- Volume per metre
- 8.213 L/m
- Material
- Steel
- NPS numeric designation
- 4
4 in · DN100 · Schedule 80
- Calculated nominal ID
- 97.18 mm
- Outside diameter
- 114.3 mm
- Wall thickness
- 8.56 mm
More dimensions
- DN designation
- 100
- Schedule
- 80
- Bore area
- 7,417.324 mm²
- Volume per metre
- 7.417 L/m
- Material
- Steel
- NPS numeric designation
- 4
KEEP THE JOB MOVING
Where does this result go next?
How to use this data
Preserve NPS/DN designation mappings; convert source inch OD and wall exactly to mm. Calculated ID = OD−2wall, bore area = πID²/4 and L/m = area[mm²]/1000. Schedule 40/80 are filters on this page, not duplicate URLs.
CHECK THE METHOD
Worked example
2 in Schedule 40: OD 2.375 in, wall 0.154 in, calculated ID 2.067 in = 52.5018 mm. Schedule 80 at the same NPS has a smaller bore.
REAL INPUTS · CLEAR METHOD
Practical worked examples
Illustrative scenarios using this page’s calculation or verified reference model. Change the assumptions for your own job.
2 inch Schedule 40 nominal steel pipe ID
Given
- Selected row
- 2 in · DN50 · Schedule 40
Calculation / lookup method
Preserve NPS/DN designation mappings; convert source inch OD and wall exactly to mm. Calculated ID = OD−2wall, bore area = πID²/4 and L/m = area[mm²]/1000. Schedule 40/80 are filters on this page, not duplicate URLs.
Result
- Calculated nominal ID
- 52.502 mm
- Outside diameter
- 60.325 mm
- Wall thickness
- 3.912 mm
ID is derived from the bounded published OD/wall facts. NPS 2 is a designation, not an exact two-inch bore; confirm the supplied product.
Open this reference scenario ↑2 inch Schedule 80 with the same nominal OD
Given
- Selected row
- 2 in · DN50 · Schedule 80
Calculation / lookup method
Preserve NPS/DN designation mappings; convert source inch OD and wall exactly to mm. Calculated ID = OD−2wall, bore area = πID²/4 and L/m = area[mm²]/1000. Schedule 40/80 are filters on this page, not duplicate URLs.
Result
- Calculated nominal ID
- 49.251 mm
- Outside diameter
- 60.325 mm
- Wall thickness
- 5.537 mm
The thicker wall reduces bore at the same listed OD. That difference changes velocity and pressure loss at a fixed flow.
Open this reference scenario ↑1 inch Schedule 40 nominal steel pipe
Given
- Selected row
- 1 in · DN25 · Schedule 40
Calculation / lookup method
Preserve NPS/DN designation mappings; convert source inch OD and wall exactly to mm. Calculated ID = OD−2wall, bore area = πID²/4 and L/m = area[mm²]/1000. Schedule 40/80 are filters on this page, not duplicate URLs.
Result
- Calculated nominal ID
- 26.645 mm
- Outside diameter
- 33.401 mm
- Wall thickness
- 3.378 mm
Use the selected material/schedule facts rather than converting the nominal inch designation directly into a hydraulic diameter.
Open this reference scenario ↑Continue the reference workflow
Common lookup questions
Can I use these values as a universal specification?
Nominal ID is derived from nominal dimensions, not a guaranteed measured inside diameter. No pressure rating, corrosion allowance, tolerance or code compliance is established.
TRACEABLE DATA
Sources, scope & verification
Dataset v1.2.0
Last verified:
Nine selected NPS 1/2–4 sizes, two schedules, from the archived Wheatland A53 product sheet. NPS5 is excluded due to source inch/mm disagreement. DN is a designation, not measured bore.
Values are curated product facts or generated scenarios. Paid standards, complete catalogs and source diagrams are not reproduced. A verification date applies to this documented subset.
Steel Schedule 40 and 80 dimensional product sheet ↗
Type D · Wheatland Tube · Sch40&80_ASTM_A53_2007; archived manufacturer sheet
Selected product/model facts only; no copied catalog text, drawings or paid-standard tables.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- bounded-product-facts
- Artifact SHA-256
- 4005f04fca597fca617222671f3afdf3e2ace993478f750727578c45be565594
Schedule 40 sprinkler pipe product sheet ↗
Type D · Wheatland Tube · WFS-080823
Selected product/model facts only; no copied catalog text, drawings or paid-standard tables.
Full provenance & artifact record
- Source checked
- 2026-10-06
- Use basis
- bounded-product-facts
- Artifact SHA-256
- No retained source artifact hash; see the stated source and verification record.