This reference page explains the dimensional and weight data for 3 inch Schedule 10 pipe, also identified as NPS 3 and DN80. Use the listed values when checking piping layouts, preparing material takeoffs, reviewing fabrication drawings, or comparing pipe data during procurement.
The most useful distinction is between nominal size and measured geometry. The nominal designation identifies the pipe size, while the outside diameter, wall thickness, and inside diameter describe the physical section used for drafting, fit-up, flow-area review, and weight estimates. The source table below is the controlling local reference for this page.
Schedule 10 pipe 3 inch (DN80) is a standard steel pipe size commonly used in piping design, fabrication, drafting, and estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 3 Schedule 10 pipe based on ASME B36.10.
3 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 3 inch
- Diameter Nominal (DN): DN80
- Outside Diameter (OD): 88.9 mm
- Wall Thickness: 3.05 mm
- Inside Diameter (ID): 82.8 mm
- Pipe Weight: 6.46 kg/m
- Pipe Weight Filled With Water: 11.84 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 3 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 3 inch | 80 | 88.9 | 3.05 | 82.8 | 6.46 |
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 3 Inch Schedule 10 Pipe
NPS 3 Schedule 10 pipe is commonly used in utility systems, water transfer lines, low-pressure process piping, drainage applications, and general fabrication work where a lighter wall thickness is suitable. It is also a practical reference size for material takeoff, support planning, and piping layout.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, support design, structural loading, fabrication estimates, and lifting calculations. Even in smaller piping systems, installed weight can affect support spacing, handling methods, and project cost.
3 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 3 inch Schedule 10 pipe?
The outside diameter is 88.9 mm.
What is the wall thickness of DN80 Schedule 10 pipe?
The wall thickness is 3.05 mm.
What is the inside diameter of NPS 3 Schedule 10 pipe?
The inside diameter is 82.8 mm.
How much does 3 inch Schedule 10 pipe weigh?
The approximate weight is 6.46 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 3 inch (DN80) has an outside diameter of 88.9 mm, wall thickness of 3.05 mm, inside diameter of 82.8 mm, and a weight of 6.46 kg/m. It is a useful reference for piping design, drafting, estimating, and fabrication work.
How to Read the 3 Inch Schedule 10 Pipe Data
For a piping drawing, the outside diameter is important when checking clearances, clamps, guides, sleeves, and connections to fittings. The wall thickness describes the pipe section used for fabrication and helps distinguish this schedule from other wall series within the same nominal size. The resulting inside diameter is the dimension most relevant when reviewing the available flow passage.
The weight figures serve a different purpose from the dimensional values. Weight per meter supports material takeoffs, transport planning, support-load estimates, and handling reviews. The filled-with-water value should be treated as an installed-load reference for the condition described in the source data; project calculations may also need to consider insulation, valves, fittings, contents, and support reactions.
Drafting and Procurement Checks
- Use the nominal designation and DN designation together when coordinating piping documents across U.S. and metric terminology.
- Check the outside diameter when coordinating pipe with clamps, sleeves, supports, fittings, and equipment connections.
- Use the wall thickness and inside diameter from the table rather than inferring geometry from the nominal size alone.
- Confirm the material grade, manufacturing requirements, end preparation, coating, and applicable project specification separately; the schedule designation does not provide all procurement information.
- For design approval, verify pressure, temperature, corrosion allowance, joining method, and code requirements with the responsible engineer.
Related Pipe Reference Topics
This page can be used alongside references for pipe schedules, NPS and DN terminology, pipe fittings, flanges, and pipe support design. Those related topics help connect the dimensional table to layout coordination, connection selection, and installation planning without replacing project specifications or engineering review.
Additional Questions About 3 Inch Schedule 10 Pipe
Is DN80 the same nominal size as 3 inch pipe?
Yes. In this reference, DN80 is the metric designation associated with the 3 inch nominal pipe size. The nominal designation should not be confused with a direct measurement of the pipe’s outside or inside diameter.
Does Schedule 10 identify the pipe material grade?
No. Schedule 10 describes a wall-thickness series for the nominal pipe size. Material grade, manufacturing requirements, corrosion allowance, and service limitations must be confirmed from the project specification and procurement documents.
Which dimension should be checked for pipe supports and clearances?
The outside diameter is the primary dimensional check for many supports, clamps, sleeves, and physical-clearance reviews. Fittings, insulation, coatings, and the support detail may require additional project-specific checks.
Can the listed pipe weight be used as the complete installed load?
No. The listed pipe weight is a reference for the pipe itself, while an installed-load review may also include contents, fittings, valves, insulation, coatings, and other attached items.