Use this reference when you need a quick dimensional check for 4 inch Schedule 160 pipe in a piping layout, material takeoff, fabrication drawing, or engineering estimate. The page distinguishes nominal pipe size from measured outside and inside dimensions, while the source table provides the authoritative local values for NPS 4 Schedule 160 steel pipe.
For drafting and coordination work, compare these dimensions with the selected fittings, flanges, valves, supports, and connection details before finalizing a model or fabrication document. The downloadable DWG at the end of the page can also support CAD-based reference work.
Schedule 160 pipe 4 inch (DN100) 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 4 Schedule 160 pipe based on ASME B36.10.
4 Inch Schedule 160 Pipe Dimensions
- Nominal Pipe Size (NPS): 4 inch
- Diameter Nominal (DN): DN100
- Outside Diameter (OD): 114.3 mm
- Wall Thickness: 13.49 mm
- Inside Diameter (ID): 87.32 mm
- Pipe Weight: 33.54 kg/m
- Pipe Weight Filled With Water: 39.52 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 160 Pipe 4 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 4 inch | 100 | 114.3 | 13.49 | 87.32 | 33.54 |
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 4 Inch Schedule 160 Pipe
NPS 4 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, support design, 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, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 4 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.
4 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 4 inch Schedule 160 pipe?
The outside diameter is 114.3 mm.
What is the wall thickness of DN100 Schedule 160 pipe?
The wall thickness is 13.49 mm.
What is the inside diameter of NPS 4 Schedule 160 pipe?
The inside diameter is 87.32 mm.
How much does 4 inch Schedule 160 pipe weigh?
The approximate weight is 33.54 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 160 pipe 4 inch (DN100) has an outside diameter of 114.3 mm, wall thickness of 13.49 mm, inside diameter of 87.32 mm, and a weight of 33.54 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This Schedule 160 Pipe Reference
NPS 4 and DN100 identify the same nominal pipe size in different sizing conventions. They are nominal designations rather than direct statements of the measured inside diameter. For layout and fabrication checks, the outside diameter, wall thickness, and inside diameter in the table are the dimensions to coordinate with adjoining components.
Schedule, wall thickness, and bore
The schedule identifies a wall-thickness series for a given nominal pipe size. In this case, Schedule 160 represents a heavier wall than lighter schedule designations for the same nominal size. Because the outside diameter remains associated with the nominal size while the wall becomes thicker, the available inside passage is reduced and the pipe-only mass increases.
Weight data and project coordination
Use the listed pipe weight when preparing material estimates, handling plans, support reactions, lifting studies, and installation logistics. The filled-with-water value is a separate loading reference from the empty pipe weight and should not be confused with the pipe-only mass. Actual delivered mass can vary with manufacturing tolerances, material requirements, coating, and supplier documentation.
Design and drafting checks
- Confirm that connected fittings and flanges use the compatible nominal size and pressure-class requirements.
- Use the inside diameter when checking clearance or flow-path geometry, rather than relying on the nominal designation.
- Coordinate the heavier wall and resulting mass with pipe supports, structural attachments, lifting plans, and installation access.
- Use the cited dimensional standard for geometry, but verify material, manufacturing, corrosion allowance, temperature, pressure, and code-design requirements separately.
Related PipeSTD resources can add value here by linking this page to the pipe schedule chart, NPS-to-DN terminology guide, steel pipe fitting dimensions, flange reference pages, and CAD/DWG resources.
Additional Questions About 4 Inch Schedule 160 Pipe
Is Schedule 160 a pressure rating?
No. Schedule 160 describes a pipe wall-thickness series. The allowable pressure for a piping component depends on the applicable design code, material specification, temperature, manufacturing requirements, corrosion considerations, and the complete piping system.
Why is the inside diameter important in a piping drawing?
The inside diameter helps establish the available flow passage and supports clearance, connection, and layout checks. It is especially important when coordinating pipe with valves, fittings, instruments, and other components.
Can the DWG file be used as final fabrication documentation?
The downloadable DWG is useful as a dimensional reference and drafting starting point. Review it against the project specification, approved component data, fabrication tolerances, and the applicable design requirements before issuing construction or fabrication documents.