Use this page as a practical reference when checking 10 inch Schedule 20 pipe in piping layouts, CAD drawings, material takeoffs, and preliminary weight reviews. The source table provides the dimensional and weight data for the NPS 10 and DN250 designation, while the notes below explain how to apply each value without confusing nominal size, actual diameter, and schedule.
For drawing coordination, the outside diameter is typically the key envelope dimension. The inside diameter is more useful for flow-area references, while wall thickness and unit weight support fabrication, estimating, transport, and support-load discussions. Confirm project-specific material, design, and code requirements before using the data for a final engineering decision.
Schedule 20 pipe 10 inch (DN250) is a standard steel pipe size commonly used in piping design, drafting, fabrication, estimation, and industrial layout work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 10 Schedule 20 pipe based on ASME B36.10.
For engineers, designers, estimators, and CAD users, quick access to accurate pipe data helps improve piping layout, support planning, weight checks, material takeoff, and fabrication coordination during project development.
10 Inch Schedule 20 Pipe Dimensions
- Nominal Pipe Size (NPS): 10 inch
- Diameter Nominal (DN): DN250
- Outside Diameter (OD): 273.1 mm
- Wall Thickness: 6.35 mm
- Inside Diameter (ID): 260.3 mm
- Pipe Weight: 41.76 kg/m
- Pipe Weight Including Water: 94.94 kg/m
- Standard: ASME B36.10
Schedule 20 Pipe 10 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 10 inch | DN250 | 273.1 mm | 6.35 mm | 260.3 mm | 41.76 kg/m |
Understanding 10 Inch Schedule 20 Pipe
10 inch Schedule 20 pipe is a standard steel pipe size used as a reference in industrial piping layouts, utility lines, water systems, process design studies, and CAD drafting. With an outside diameter of 273.1 mm and a wall thickness of 6.35 mm, this pipe size is useful where a practical flow path is needed while keeping the wall lighter than heavier schedules.
What Does Schedule 20 Mean?
Schedule 20 refers to the wall thickness series of the pipe. For NPS 10, Schedule 20 gives a wall thickness of 6.35 mm. The schedule affects the inside diameter, pipe weight, fabrication requirements, and dimensional coordination with fittings, supports, and layout clearances.
Why These Pipe Dimensions Matter
Accurate pipe dimension data is important for piping layouts, spool drawings, support design, structural load review, and material takeoff. Knowing that this pipe weighs 41.76 kg/m helps with transport estimates, lifting plans, and support loading. If the pipe is filled with water, the total weight increases to 94.94 kg/m, which is also useful for operating load calculations.
Common Uses of DN250 Schedule 20 Pipe
DN250 Schedule 20 pipe may be referenced in industrial utility systems, water transfer lines, plant layout studies, process piping documentation, and engineering design work. It is also commonly used by piping designers, CAD users, estimators, and procurement teams who need fast access to standard steel pipe dimensions.
Difference Between NPS 10 and DN250
NPS 10 is the inch-based nominal pipe size designation, while DN250 is the metric nominal diameter reference. Both refer to the same pipe size category on this page. The actual standard outside diameter for this size is 273.1 mm.
How to Use This Data
You can use this page to quickly check:
- pipe outside diameter for layout and clearance
- inside diameter for flow reference
- wall thickness for schedule comparison
- weight per meter for estimation and transport planning
- water-filled weight for support and structural load review
Quick Reference for Schedule 20 Pipe 10 Inch
- Pipe Size: 10 inch
- DN: DN250
- OD: 273.1 mm
- ID: 260.3 mm
- Wall Thickness: 6.35 mm
- Weight: 41.76 kg/m
- Weight Including Water: 94.94 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 20 Pipe 10 Inch (DN250) is an important steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 273.1 mm outside diameter, 6.35 mm wall thickness, and 41.76 kg/m pipe weight, it provides useful dimensional data for engineers and designers who need fast and accurate pipe information.
Note: NPS = Nominal Pipe Size, DN = Diameter Nominal. Dimensions and weights shown here are based on ASME B36.10 steel pipe data.
How to Read the 10 Inch DN250 Pipe Data
NPS 10 and DN250 are two designation systems for the same nominal pipe size category shown on this page. Neither designation should be read as the measured outside or inside diameter. For dimensional coordination, use the listed 273.1 mm outside diameter, 260.3 mm inside diameter, and 6.35 mm wall thickness rather than estimating dimensions from the nominal name.
Using the Data in Drawings and Layouts
- Use the outside diameter when checking pipe envelopes, clearances, clamps, sleeves, and routing space.
- Use the inside diameter as a reference for flow-area discussions and preliminary line sizing checks.
- Use wall thickness when coordinating section details, weld preparation information, and schedule comparisons.
- Use the pipe weight per meter for material estimates, handling discussions, and preliminary support-load reviews.
- Use the water-filled weight when reviewing an operating condition that includes water inside the pipe.
The listed pipe weight and water-filled weight describe different conditions. They should not be combined or substituted without checking what the calculation is intended to represent. A complete support or structural review may also need to consider fittings, valves, insulation, lining, contents other than water, test conditions, and applicable project requirements.
Schedule, Nominal Size, and Design Verification
In this reference, Schedule 20 identifies the wall-thickness series associated with NPS 10. It is not, by itself, a complete pressure-design qualification. Final selection and service evaluation require project information such as pipe material, fluid, temperature, pressure, corrosion allowance, joining method, supports, and the governing design requirements.
For CAD and drafting work, the downloadable DWG can help establish the pipe representation in a drawing workflow. Check the downloaded geometry against the authoritative dimensions on this page and coordinate it with the project’s fitting, flange, valve, and support models. Related size references are available for 8 inch DN200 Schedule 20 pipe and 12 inch DN300 Schedule 20 pipe.
What to Confirm Before Reusing the Reference
Before transferring these values into a specification, bill of materials, stress model, or fabrication document, confirm that the required pipe standard, material grade, manufacturing requirements, dimensional tolerances, and project revision match the intended application. This page is a dimensional reference; it does not replace the project design basis or an engineer’s verification.
Frequently Asked Questions
What are the listed dimensions for 10 inch Schedule 20 pipe?
The listed NPS 10 DN250 pipe has a 273.1 mm outside diameter, 6.35 mm wall thickness, and 260.3 mm inside diameter. Its listed pipe weight is 41.76 kg/m.
Are NPS 10 and DN250 the same pipe size?
On this page, NPS 10 and DN250 identify the same nominal pipe size category. The actual dimensional reference is the listed outside diameter, not the nominal designation itself.
Does Schedule 20 define the pipe pressure rating?
No. Schedule 20 describes the pipe wall-thickness series for this size. Pressure design also depends on material, temperature, fluid, corrosion allowance, joining details, design rules, and project requirements.
Which weight should be used for a support review?
Use the listed dry pipe weight when the review concerns the pipe alone. Use the listed water-filled weight when the operating condition includes water. Add other relevant loads, such as fittings, valves, insulation, and supports, according to the project calculation basis.
Can the inside diameter be used for final flow design?
The listed inside diameter is useful as a dimensional and preliminary flow reference. Final flow design should also account for the fluid, operating conditions, roughness, fittings, elevation, and the applicable engineering method.
Is a CAD file available for this pipe size?
Yes. The page includes a downloadable DWG reference for Schedule 20 Pipe 10 Inch DN250. Review the file together with the listed dimensions before incorporating it into project drawings.