This reference brings together the key dimensional and weight information for 3 inch Schedule 5 pipe, also identified as DN80. Use it when checking piping layouts, material takeoffs, fabrication drawings, or procurement descriptions.
The dimensional table below separates nominal size from measured pipe geometry. That distinction is important when coordinating the pipe with fittings, supports, clamps, sleeves, and other piping components. For related reference work, pair this page with resources covering pipe schedules, pipe fittings, flanges, and pipe CAD/DWG files.
Schedule 5 Pipe 3 Inch (DN80) is a steel pipe size commonly used in industrial piping systems that require good flow capacity with a relatively light wall thickness. This pipe size is often used in utility piping, water systems, low-pressure industrial service, and general steel pipe fabrication work.
This dimension data is based on ANSI/ASME B36.10, which is the standard commonly used for carbon steel pipe dimensions.
3 Inch Schedule 5 Pipe Dimensions
- Pipe Schedule: 5
- Nominal Pipe Size: 3 Inch
- DN Size: DN80
- Outside Diameter (OD): 88.9 mm
- Inside Diameter (ID): 84.68 mm
- Wall Thickness: 2.11 mm
- Pipe Weight: 4.52 kg/m
- Pipe Weight Including Water: 10.14 kg/m
- Standard: ANSI/ASME B36.10
Schedule 5 Pipe 3 Inch Dimension Table
| Pipe Schedule | NPS (Inch) | DN (mm) | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 5 | 3 | 80 | 88.9 | 84.68 | 2.11 | 4.52 |
What Is 3 Inch Schedule 5 Pipe?
A 3 inch Schedule 5 pipe is a steel pipe with a nominal size of 3 inches and a relatively thin wall thickness compared with heavier schedules. For this size, the outside diameter is fixed at 88.9 mm, while the inside diameter is 84.68 mm based on a wall thickness of 2.11 mm.
Schedule 5 pipe is often selected when a project needs good flow capacity, reduced pipe weight, and easier handling compared with thicker wall pipes. It is commonly referenced in steel piping design, drafting, fabrication, and material takeoff work.
Where Is Schedule 5 Pipe 3 Inch Used?
This pipe size is commonly used in applications that need good flow capacity with relatively light wall thickness. Typical uses include:
- Water transfer and distribution systems
- Utility and low-pressure industrial piping
- Process and service lines
- Pipe spool fabrication and layout work
- General steel piping projects
Why Pipe Dimensions Matter
Accurate 3 inch Schedule 5 pipe dimensions are important for piping layout, fabrication, transport planning, support design, and installation work. Engineers and designers often check OD, ID, wall thickness, and weight before selecting supports, fittings, welding details, and handling methods.
The outside diameter is important for matching supports, clamps, and pipe accessories. The inside diameter helps estimate internal flow area and system capacity. The wall thickness affects mechanical strength and specification compliance, while the pipe weight per meter is useful for lifting plans, transport, and structural loading calculations.
3 Inch Schedule 5 Pipe Weight Information
The nominal weight of this pipe size is 4.52 kg/m. When filled with water, the combined weight becomes approximately 10.14 kg/m. This information is useful for pipe support design, structural coordination, and lifting preparation in piping systems.
Difference Between NPS 3 and DN80
NPS 3 is the inch-based nominal pipe size, while DN80 is the metric designation used in international drawings and specifications. Both terms refer to the same nominal pipe size, and users may search by either inch size or DN format depending on project standards.
Common Search Terms for This Pipe Size
Users may also search for this pipe using related keywords such as 3 inch Schedule 5 pipe dimensions, DN80 Schedule 5 pipe dimensions, 3 inch pipe weight per meter, DN80 pipe dimensions, or DN80 sch 5 pipe dimensions.
Conclusion
Schedule 5 Pipe 3 Inch (DN80) has an outside diameter of 88.9 mm, an inside diameter of 84.68 mm, a wall thickness of 2.11 mm, and a weight of 4.52 kg/m. It is a useful steel pipe reference size for design, drafting, fabrication, and procurement work.
This page provides a quick reference for engineers, drafters, fabricators, and buyers who need reliable 3 inch Schedule 5 pipe dimensions and DN80 pipe dimensions in one place.
How to Use This Pipe Reference
Start with the nominal designations: NPS 3 and DN80 identify the same nominal pipe size in inch-based and metric-style terminology. For physical coordination, use the listed outside diameter rather than the nominal size. The outside diameter is the controlling reference for many supports, clamps, sleeves, and connection details.
The listed inside diameter describes the available internal passage for flow-related checks. The wall thickness is useful when reviewing fabrication details and specification compliance. These dimensions should be checked against the project piping specification and the selected material before fabrication or installation.
Design and Drafting Considerations
- Use the outside diameter when coordinating supports, clamps, penetrations, and clearance zones.
- Use the inside diameter when preparing preliminary flow-area or internal-clearance checks.
- Use the pipe weight for material takeoffs, handling planning, and coordination with supports.
- Use the water-filled weight only where the operating or test condition requires the pipe contents to be included.
- Confirm material grade, joining method, corrosion allowance, service conditions, and governing project requirements before making a final engineering selection.
Related Pipe Reference Topics
Readers comparing this size with alternatives may also need a pipe schedule comparison, a DN80 pipe dimensions reference, a pipe weight guide, or a steel pipe fittings and flanges guide. A downloadable DWG reference can support drafting, but the drawing should be checked against the project specification before release for fabrication.
Frequently Asked Questions
What does 3 inch Schedule 5 pipe mean?
It identifies a steel pipe with the nominal pipe size NPS 3 and the Schedule 5 dimensional designation. The page table provides the corresponding DN designation, diameter values, wall thickness, and weight.
Is NPS 3 the same as DN80?
Yes. NPS 3 is the inch-based nominal designation, while DN80 is the metric-style designation used for the same nominal pipe size.
Which dimension should I use for a pipe support or clamp?
Use the listed outside diameter when coordinating supports, clamps, sleeves, and similar external components. Do not select these components from the nominal size alone.
Why are both pipe weight and water-filled weight shown?
Pipe weight supports planning for dry material handling and structural coordination. Water-filled weight helps with load checks when the pipe contents must be included in the relevant operating or test condition.
Can the schedule designation alone confirm that the pipe is suitable for service?
No. A schedule designation describes the dimensional configuration, but final selection also depends on material, joining details, service conditions, design requirements, and the applicable project specification. Engineering verification is required before use in a specific system.