Use this reference when checking NPS 10 Schedule 120 pipe in piping layouts, material takeoffs, fabrication drawings, and preliminary weight estimates. The table below distinguishes nominal size from measured outside and inside dimensions so the data can be applied consistently in design and drafting workflows.
Schedule 120 pipe 10 inch (DN250) is a heavy-wall steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 10 Schedule 120 pipe based on ASME B36.10.
10 Inch Schedule 120 Pipe Dimensions
- Nominal Pipe Size (NPS): 10 inch
- Diameter Nominal (DN): DN250
- Outside Diameter (OD): 273.1 mm
- Wall Thickness: 21.44 mm
- Inside Diameter (ID): 230.12 mm
- Pipe Weight: 133.01 kg/m
- Pipe Weight Filled With Water: 174.57 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 120 Pipe 10 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 10 inch | 250 | 273.1 | 21.44 | 230.12 | 133.01 |
What Does Schedule 120 Mean?
Schedule 120 refers to a heavy wall thickness series used for steel pipe under ASME B36.10. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness increases according to the schedule. A thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 10 Inch Schedule 120 Pipe
NPS 10 Schedule 120 pipe is commonly referenced for heavy-duty industrial piping systems where high wall thickness is required. It may be used in process piping, plant utility systems, structural loading checks, fabrication work, and engineering applications where pipe strength and wall thickness are more critical than maximum flow area.
Why Pipe Weight Matters
Pipe weight per meter is essential for transport planning, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 10 inch Schedule 120 pipe, the heavy wall thickness results in much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
10 Inch Schedule 120 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material specification, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 10 inch Schedule 120 pipe?
The outside diameter is 273.1 mm.
What is the wall thickness of DN250 Schedule 120 pipe?
The wall thickness is 21.44 mm.
What is the inside diameter of NPS 10 Schedule 120 pipe?
The inside diameter is 230.12 mm.
How much does 10 inch Schedule 120 pipe weigh?
The approximate weight is 133.01 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 120 pipe 10 inch (DN250) has an outside diameter of 273.1 mm, wall thickness of 21.44 mm, inside diameter of 230.12 mm, and a weight of 133.01 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Read the 10 Inch Schedule 120 Data
NPS 10 and DN250 are nominal size designations used to identify the pipe size across drawings, specifications, and procurement documents. They should not be treated as a direct substitute for the measured outside diameter. For connection, layout, and clearance work, use the listed outside diameter; for flow-area and internal-clearance checks, use the listed inside diameter.
The schedule identifies a wall-thickness series for the nominal pipe size. In this case, the heavier wall reduces the available internal diameter and increases the mass per unit length. That distinction is useful when comparing pipe schedules, selecting supports, preparing spool drawings, or estimating lifting and transport requirements.
Design and Drafting Checks
- Use the outside diameter when checking clearances, clamps, guides, sleeves, and branch connections.
- Use the wall thickness when preparing fabrication details and reviewing the relationship between the pipe bore and outside profile.
- Use the dry pipe weight for preliminary support, handling, and material estimates, while recognizing that final calculations may require additional contents, insulation, lining, fittings, and structural attachments.
- Confirm the material specification, manufacturing tolerance, corrosion allowance, temperature, pressure, and applicable design code before using the dimensions in a final engineering calculation.
For broader comparisons, this page can be read alongside the site’s pipe dimensions and schedules, NPS and DN pipe size guide, steel pipe weight reference, and pipe fitting and flange dimensions resources. Those related references help connect straight-pipe data with layout, connection, and estimating work.
Practical Questions About 10 Inch Schedule 120 Pipe
Is Schedule 120 a pressure rating?
No. Schedule 120 identifies a pipe wall-thickness series. A pressure design decision also depends on material, temperature, joining method, corrosion allowance, manufacturing requirements, and the governing design code.
Should the nominal size be used for CAD clearance checks?
No. Use the listed outside diameter for external clearance and connection-layout checks. The nominal NPS or DN designation is primarily an identification system.
Why is the filled-pipe weight different from the pipe-only weight?
The filled value includes the weight of water inside the listed pipe bore. Actual operating loads can differ when the pipe contains another fluid or when insulation, lining, valves, fittings, and supports are included.
Can this table replace a project piping specification?
No. It is a dimensional reference. Project specifications and procurement documents should still define material, end preparation, length, tolerances, testing, coating, and other requirements applicable to the service.
What should be checked before downloading the CAD reference?
Confirm the nominal size, schedule, outside profile, wall thickness, units, and drawing orientation against the project model and the authoritative table on this page. The DWG should support drafting; it should not replace a project-specific design review.