This reference page brings together the dimensional, weight, and terminology information needed to review Schedule STD Pipe 26 Inch (DN650). Use the table as the primary source for the listed pipe data, then apply the explanatory guidance below when checking drawings, material take-offs, procurement documents, and installation planning.
For related work, readers may also want to compare this entry with resources covering pipe schedules, large-diameter pipe dimensions, pipe fittings and flanges, pipe support loads, and DWG pipe references.
Schedule STD Pipe 26 Inch (DN650) is a steel pipe size commonly used in large industrial and utility piping systems where standard dimensions, structural reliability, and high flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 660 mm, an inside diameter of 640.94 mm, a wall thickness of 9.53 mm, and a pipe weight of 152.88 kg/m.
26 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 26 Schedule STD pipe, which corresponds to DN650 in metric designation.
- Pipe Size: NPS 26 Inch
- DN Size: DN650
- Outside Diameter (OD): 660 mm
- Inside Diameter (ID): 640.94 mm
- Wall Thickness: 9.53 mm
- Pipe Weight: 152.88 kg/m
- Pipe Weight Including Water: 475.36 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 26 Inch (DN650) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 26 Inch | 650 | 660 | 640.94 | 9.53 | 152.88 |
What Is Schedule STD Pipe?
Schedule STD means Standard Weight in the IPS pipe system and is commonly referenced for carbon steel and steel pipe dimensions under ASME B36.10. In practical piping work, Schedule STD is used as a standard wall thickness designation for many nominal pipe sizes. It helps engineers, fabricators, and buyers confirm dimensional compatibility, estimate weight, and coordinate with fittings, flanges, supports, and structural loads.
Common Uses of 26 Inch Schedule STD Pipe
26 inch Schedule STD pipe is commonly used in large piping systems where high flow capacity and standard steel pipe dimensions are required. This size is often selected for utility, transmission, and industrial services where large-volume flow and reliable dimensional data are important for design and construction.
- Large water transmission lines for plant and utility service
- Cooling water systems in power plants and industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in large process plants
- Pump suction and discharge lines where large diameter piping is needed
- Municipal and public works projects requiring large steel pipe sizes
- Replacement and upgrade projects where standard pipe dimensions are required
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, handling requirements, and installation planning. Final pipe selection should always be verified against project pressure, temperature, fluid type, corrosion allowance, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for support design, material take-off, transport planning, lifting studies, welding preparation, and installation work. For a pipe as large as 26 inch DN650, accurate weight data is especially useful for crane selection, support design, and logistics planning. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 26 and DN650 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. The current page identifies this pipe as NPS 26 and DN650, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 26 Inch (DN650) is listed on the current page with 660 mm OD, 640.94 mm ID, 9.53 mm wall thickness, and 152.88 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for large piping systems and project coordination.
How to Read This Pipe Reference
The page identifies the pipe by both its inch-based nominal designation, NPS 26, and its metric designation, DN650. These labels support communication between engineering, drafting, fabrication, and purchasing teams, but they should not be treated as a direct statement of the measured inside diameter.
For dimensional coordination, start with the listed outside diameter because it affects fittings, flanges, clamps, supports, penetrations, and layout clearances. Use the listed inside diameter when reviewing hydraulic calculations or clearance through the pipe. The stated wall thickness is relevant to fabrication, welding preparation, corrosion review, and mass calculations.
Design and Procurement Checks
- Confirm that the schedule designation in the piping specification matches the schedule shown on the drawing and purchase documentation.
- Coordinate the pipe outside diameter with compatible fittings, flanges, valves, gaskets, and connection details.
- Use the listed pipe weight for preliminary material take-offs, handling reviews, transport planning, and support-load coordination.
- Review the separate water-filled weight when considering installation or operating conditions involving water, while keeping project-specific contents and load cases under review.
- Verify pressure, temperature, fluid service, corrosion allowance, material grade, joining method, and applicable project requirements before final selection.
Why the DWG Reference Is Useful
The downloadable DWG can support drafting and layout workflows where a consistent pipe representation is needed. Before using a CAD reference for fabrication or construction, check the drawing units, insertion scale, layer conventions, centerline assumptions, and connection details against the project model and specification.
Related Pipe Reference Topics
This page can serve as a starting point for internal research into pipe schedule comparisons, NPS and DN conversion terminology, pipe weight calculations, steel pipe fittings, flange dimensions, and piping support design. These related topics help connect dimensional data with the coordination tasks that follow selection of a nominal pipe size.
Frequently Asked Questions
What does Schedule STD mean for this pipe?
Schedule STD means Standard Weight in the inch-based IPS pipe system. It identifies a standard wall designation used for dimensional coordination; it does not by itself establish the complete pressure capability of a piping system.
Are NPS 26 and DN650 the same designation?
They are the inch-based and metric nominal designations used for the pipe listed on this page. The nominal labels help identify the size across drawings and specifications, while the OD and ID provide the dimensional information needed for coordination and analysis.
Why are both pipe weight and water-filled weight shown?
Pipe weight supports material take-offs, transport, lifting, and support coordination. The water-filled value provides an additional reference for situations where the pipe contents contribute to handling or load review. Actual project load cases should account for the specified contents and operating conditions.
Can the listed dimensions be used as a complete design basis?
No. The listed dimensions are useful for reference and coordination, but final selection requires review of pressure, temperature, fluid type, corrosion allowance, material specifications, connections, supports, and applicable project requirements.
What should be checked before using the DWG file?
Check the CAD file units, scale, layer setup, dimensional assumptions, and connection interfaces against the project standard. The DWG should complement, not replace, the governing project drawings and specifications.