Use this reference when you need to check the dimensional relationship between nominal pipe size, schedule, wall thickness, and usable bore for NPS 2 1/2 Schedule 160 steel pipe. The page brings the key data together for piping designers, estimators, fabricators, and CAD users while keeping the distinction between nominal size and measured geometry clear.
For related work, connect this reference with the site’s pipe schedule tables, steel pipe dimensions, flange references, pipe fittings, and DWG resources. Those cross-references help users move from a straight-pipe dimension check to a complete drafting or piping layout review.
Schedule 160 pipe 2 1/2 inch (DN65) is an extra heavy-wall steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 2 1/2 Schedule 160 pipe based on ASME B36.10.
2 1/2 Inch Schedule 160 Pipe Dimensions
- Nominal Pipe Size (NPS): 2 1/2 inch
- Diameter Nominal (DN): DN65
- Outside Diameter (OD): 73 mm
- Wall Thickness: 9.53 mm
- Inside Diameter (ID): 53.94 mm
- Pipe Weight: 14.92 kg/m
- Pipe Weight Filled With Water: 17.2 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 160 Pipe 2 1/2 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 2 1/2 inch | 65 | 73 | 9.53 | 53.94 | 14.92 |
What Does Schedule 160 Mean?
Schedule 160 refers to an extra heavy wall thickness series used for steel pipe under ASME B36.10. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness increases according to the schedule. A much thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 2 1/2 Inch Schedule 160 Pipe
NPS 2 1/2 Schedule 160 pipe is commonly referenced for very heavy-duty industrial piping systems where extremely high wall thickness is required. It may be used in process piping, plant utility systems, structural loading checks, fabrication work, and engineering applications where pipe strength and wall thickness are more critical than maximum flow area.
Why Pipe Weight Matters
Pipe weight per meter is essential for transport planning, lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 2 1/2 inch Schedule 160 pipe, the extra heavy wall thickness results in much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
2 1/2 Inch Schedule 160 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material specification, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 2 1/2 inch Schedule 160 pipe?
The outside diameter is 73 mm.
What is the wall thickness of DN65 Schedule 160 pipe?
The wall thickness is 9.53 mm.
What is the inside diameter of NPS 2 1/2 Schedule 160 pipe?
The inside diameter is 53.94 mm.
How much does 2 1/2 inch Schedule 160 pipe weigh?
The approximate weight is 14.92 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 160 pipe 2 1/2 inch (DN65) has an outside diameter of 73 mm, wall thickness of 9.53 mm, inside diameter of 53.94 mm, and a weight of 14.92 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This Pipe Reference
Start with the outside diameter when coordinating pipe with fittings, clamps, supports, sleeves, or connection details. Use wall thickness and inside diameter when checking available bore, clearance, fabrication details, or the relationship between the pipe and connected components.
The schedule identifies a wall-thickness series for a nominal pipe size; it is not a direct statement of allowable pressure or design suitability. Final selection should also account for the applicable material specification, temperature, corrosion allowance, manufacturing tolerance, joining method, code requirements, and project design basis.
Drafting and Estimating Considerations
- Use the listed outside diameter for layout and interference checks.
- Use the inside diameter when a drawing or calculation depends on the pipe opening rather than the nominal size.
- Use the listed mass per meter for preliminary material takeoffs, support-load coordination, handling studies, and installation planning.
- Confirm whether a project drawing requires nominal dimensions, actual dimensions, or supplier-certified product data.
The accompanying DWG resource can support preliminary drafting and coordination. Before issuing fabrication or construction documents, verify units, layer conventions, end conditions, tolerances, and the project’s approved material and piping specifications.
Related PipeSTD References
This page is a useful starting point for internal links to the broader pipe dimensions collection, pipe schedule comparison guides, ASME B36.10 references, pipe weight resources, and piping CAD/DWG downloads. Linking these topics gives readers a clear path from dimensional lookup to design coordination without duplicating the authoritative table.
Practical Questions About Using the Data
Is NPS the same as the measured inside diameter?
No. NPS is a nominal designation. The actual outside diameter, wall thickness, and inside diameter are the dimensions used for physical coordination and calculations.
Can the listed dimensions be used for a pressure design?
They are dimensional reference data only. Pressure design also requires the applicable material, temperature, code rules, manufacturing requirements, corrosion considerations, and project-specific verification.
Why should the pipe weight be checked during layout?
Pipe mass affects supports, lifting, handling, transport, installation planning, and structural coordination. The pipe should be considered together with fittings, valves, fluid contents, insulation, and other attached items where applicable.
What should be verified before using the DWG file?
Check the drawing units, scale, geometry, layer information, end representation, and revision status against the project’s drafting requirements before using it in issued documents.