This reference page is intended for engineers, piping designers, fabricators, estimators, and CAD users who need a quick check of 26 inch Schedule 10 pipe data. It brings together the nominal size, DN designation, outside diameter, wall thickness, inside diameter, and weight values used in the local reference table.
Use the dimensional data when checking layouts, preparing takeoffs, reviewing fabrication drawings, or comparing pipe schedules. For related work, readers may also benefit from a pipe schedule chart, an NPS and DN reference, a pipe weight calculation guide, and other steel pipe dimension references.
Schedule 10 pipe 26 inch (DN650) is a large-diameter steel pipe size commonly used as a reference in piping design, fabrication, drafting, and estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 26 Schedule 10 pipe based on ASME B36.10.
26 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 26 inch
- Diameter Nominal (DN): DN650
- Outside Diameter (OD): 660 mm
- Wall Thickness: 7.92 mm
- Inside Diameter (ID): 644.16 mm
- Pipe Weight: 127.36 kg/m
- Pipe Weight Filled With Water: 453.08 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 26 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 26 inch | 650 | 660 | 7.92 | 644.16 | 127.36 |
What Does Schedule 10 Mean?
Schedule 10 refers to the wall thickness series of the pipe. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes depending on the schedule. A thicker wall generally increases pipe weight and reduces the inside diameter.
Typical Uses of 26 Inch Schedule 10 Pipe
NPS 26 Schedule 10 pipe is commonly used where large flow capacity is needed with relatively lighter wall thickness than heavier schedules. It may be used in water transfer lines, utility systems, low-pressure process piping, drainage applications, and general plant layout or fabrication reference work.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, support design, structural loading, fabrication estimates, and lifting calculations. In large-diameter piping systems, total line weight can significantly affect support spacing, installation methods, and project cost.
26 Inch Schedule 10 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimension data using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material grade, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 26 inch Schedule 10 pipe?
The outside diameter is 660 mm.
What is the wall thickness of DN650 Schedule 10 pipe?
The wall thickness is 7.92 mm.
What is the inside diameter of NPS 26 Schedule 10 pipe?
The inside diameter is 644.16 mm.
How much does 26 inch Schedule 10 pipe weigh?
The approximate weight is 127.36 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for welded and seamless wrought steel pipe.
Conclusion
Schedule 10 pipe 26 inch (DN650) has an outside diameter of 660 mm, wall thickness of 7.92 mm, inside diameter of 644.16 mm, and a weight of 127.36 kg/m. It is a useful reference for piping design, drafting, estimating, and fabrication work.
How to Read This 26 Inch Pipe Reference
The page uses three common ways to identify the same pipe size: NPS 26, 26 inch, and DN650. These labels support communication between design, procurement, fabrication, and drafting teams, while the outside diameter and wall thickness provide the dimensional basis for checking the pipe section.
Using the Dimensions in Design and Drafting
The outside diameter is useful when checking clearances, supports, clamps, sleeves, branch connections, and equipment interfaces. The inside diameter is relevant to flow-area checks and internal clearance. Wall thickness and weight are commonly reviewed during material takeoffs, support assessments, lifting planning, and fabrication coordination.
For CAD work, the supplied DWG reference can help establish the pipe geometry in a drawing or layout. Always confirm how the model represents end conditions, connection details, coatings, tolerances, and adjoining components before using it for fabrication or construction documentation.
Schedule Selection and Engineering Review
Schedule 10 identifies a wall-thickness series for the nominal pipe size; it is not, by itself, a complete statement of allowable pressure, temperature, corrosion allowance, material grade, or design suitability. Those items require project specifications and engineering review. The listed weight is a reference value, so procurement and structural calculations should account for the applicable product specification, manufacturing tolerances, contents, insulation, valves, fittings, and support arrangement.
Additional Reference Questions
Why are both NPS and DN shown?
NPS and DN are standard designation systems used to identify pipe size. Showing both labels makes the reference easier to use across drawings, specifications, supplier documents, and international project teams.
Can the listed pipe weight be used directly for support design?
It can serve as a preliminary reference, but support design should include the complete installed condition, including contents, fittings, valves, insulation, operating effects, and project-specific load requirements.
What should be checked before ordering this pipe?
Confirm the required material grade, product specification, manufacturing method, dimensional tolerance, end preparation, corrosion allowance, coating, and applicable project requirements with the responsible engineer or supplier.