This reference provides the dimensional and weight data for 3 inch Schedule STD pipe, also identified as NPS 3 and DN80. Use the values below when coordinating pipe layouts, material take-offs, supports, fittings, flanges, and fabrication documents.
The page also explains how nominal pipe size, outside diameter, inside diameter, wall thickness, and unit weight relate to practical piping work. The downloadable DWG resource can support drafting and layout coordination, but project-specific design checks remain necessary.
Schedule STD Pipe 3 Inch (DN80) is a steel pipe size commonly used in industrial and utility piping systems where standard dimensions, structural reliability, and dependable flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 88.9 mm, an inside diameter of 77.92 mm, a wall thickness of 5.49 mm, and a pipe weight of 11.29 kg/m.
3 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 3 Schedule STD pipe, which corresponds to DN80 in metric designation.
- Pipe Size: NPS 3 Inch
- DN Size: DN80
- Outside Diameter (OD): 88.9 mm
- Inside Diameter (ID): 77.92 mm
- Wall Thickness: 5.49 mm
- Pipe Weight: 11.29 kg/m
- Pipe Weight Including Water: 16.05 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 3 Inch (DN80) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 3 Inch | 80 | 88.9 | 77.92 | 5.49 | 11.29 |
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 3 Inch Schedule STD Pipe
3 inch Schedule STD pipe is commonly used in industrial and utility piping systems where good flow capacity and standard steel pipe dimensions are required. This size is often selected for water, cooling, transmission, and plant services where reliable dimensional data is important for design, fabrication, and construction.
- Water transmission lines for plant and utility service
- Cooling water systems in industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in process plants
- Pump suction and discharge lines where larger diameter piping is needed
- Municipal and public works projects requiring 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 3 inch DN80, accurate weight data is useful for support design, material planning, and installation review. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 3 and DN80 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 3 and DN80, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 3 Inch (DN80) is listed on the current page with 88.9 mm OD, 77.92 mm ID, 5.49 mm wall thickness, and 11.29 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for piping systems and project coordination.
How to Use This Pipe Reference
Start with the dimensional table when checking whether a pipe is compatible with a drawing, specification, fitting arrangement, or procurement description. Outside diameter is especially important for fitting interfaces, clamps, supports, sleeves, and clearance checks. Inside diameter is used when reviewing flow area and hydraulic calculations.
Wall thickness helps identify the pipe section represented by the Schedule STD designation and is relevant to fabrication, welding preparation, corrosion review, and mechanical checks. The listed weight per unit length supports material take-offs, handling plans, transportation estimates, and preliminary support-loading reviews.
Schedule Designation Is Not a Complete Design Specification
Schedule STD identifies a dimensional wall designation; it does not by itself establish the pipe material grade, allowable pressure, operating temperature, corrosion allowance, joining method, or inspection requirements. Those items must be confirmed from the project specification and applicable design documents.
For a complete piping review, compare this reference with the selected pipe fittings, flange dimensions, valves, gaskets, supports, and connection details. The NPS and DN labels help coordinate documents, but the dimensional values should be checked before fabrication or purchase.
Related Drafting and Piping References
This page is most useful alongside references for pipe schedules, NPS and DN terminology, steel pipe fittings, flanges, and piping CAD/DWG files. Linking those resources from this section can help readers move from dimensional lookup to layout, connection, and procurement decisions without confusing nominal size with actual measured diameter.
Frequently Asked Questions
What does Schedule STD mean for 3 inch pipe?
Schedule STD means Standard Weight in the inch-based IPS pipe system. For this page, it identifies the dimensional pipe section associated with NPS 3 and DN80.
Are NPS 3 and DN80 the same pipe size?
They are the inch-based and metric nominal designations used for the pipe covered by this reference. The designations are nominal labels, so the actual outside and inside diameters should be taken from the listed dimensional data.
Why are both outside diameter and inside diameter listed?
Outside diameter is used for interfaces, supports, clearances, and fabrication coordination. Inside diameter is used for flow-area review and hydraulic calculations. Their relationship also reflects the listed wall thickness.
What is the listed pipe weight used for?
The pipe weight supports material take-offs, transport and handling planning, and preliminary support-load review. The page also lists a separate value for pipe weight including water, which should be used only when that service condition applies.
Does Schedule STD determine the allowable pressure?
No. Allowable pressure depends on additional factors such as material, temperature, corrosion allowance, joining details, design code, and project requirements. Schedule information alone is not a pressure-rating calculation.
Is a DWG file available for this pipe?
Yes. The page includes a downloadable DWG resource for Schedule STD Pipe 3 Inch DN80. Review the drawing against the current dimensional table and project drafting standards before using it for fabrication or construction.