Schedule 40 pipe 1/4 inch (DN8) is a standard small-bore steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions and weight data for NPS 1/4 Schedule 40 pipe based on ANSI / ASME B36.10, including outside diameter, inside diameter, wall thickness, and weight per meter.
This size is often used in small utility lines, instrumentation piping, low-volume service connections, and fabrication work where accurate dimensional data is important for routing, support selection, material takeoff, and installation planning.
1/4 Inch Schedule 40 Pipe Dimensions
- Nominal Pipe Size (NPS): 1/4 inch
- Diameter Nominal (DN): DN8
- Pipe Schedule: Schedule 40
- Outside Diameter (OD): 13.7 mm
- Wall Thickness: 2.24 mm
- Inside Diameter (ID): 9.22 mm
- Pipe Weight: 0.63 kg/m
- Pipe Weight Including Water: 0.69 kg/m
- Reference Standard: ANSI / ASME B36.10
Schedule 40 Pipe 1/4 Inch (DN8) Data Table
| NPS | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 1/4 inch | DN8 | 13.7 | 2.24 | 9.22 | 0.63 |
What Is 1/4 Inch Schedule 40 Pipe Used For?
1/4 inch Schedule 40 pipe is commonly used in small-bore industrial and utility piping systems where a standardized steel pipe size is required. Engineers, designers, and fabricators often use this size in instrumentation connections, utility piping, compressed air lines, small process piping systems, and light fabrication work.
Because this is a compact pipe size, accurate dimensions and weight data are useful for installation work, support selection, material estimation, and field coordination.
Why These Dimensions Matter in Engineering
In piping and mechanical design, standard pipe dimensions are important for more than simple identification. The outside diameter is used for supports, clamps, and connection layouts. The inside diameter affects internal flow area and small-bore hydraulic calculations. The wall thickness is important for fabrication, welding preparation, and pipe strength, while the pipe weight per meter is useful for support load checks and installation planning.
Using the correct DN8 Schedule 40 pipe dimensions helps reduce drafting errors, procurement mistakes, and field fit-up problems during construction and fabrication work.
1/4 Inch DN8 Schedule 40 Pipe for CAD and Drafting Work
For CAD, BIM, and piping drafting work, this size is commonly listed as NPS 1/4 or DN8. The standard OD of 13.7 mm is especially useful for routing clearance, support detailing, and nozzle or equipment connection references in both 2D drawings and 3D models.
This page can be used as a quick reference for 1/4 inch Schedule 40 pipe dimensions, DN8 pipe dimensions, and Schedule 40 steel pipe weight per meter during design, drafting, and estimation work.
Frequently Asked Questions
What is the outside diameter of 1/4 inch Schedule 40 pipe?
The outside diameter of 1/4 inch Schedule 40 pipe is 13.7 mm.
What is the wall thickness of DN8 Schedule 40 pipe?
The wall thickness is 2.24 mm.
What is the inside diameter of Schedule 40 pipe 1/4 inch?
The inside diameter is 9.22 mm.
How much does 1/4 inch Schedule 40 pipe weigh?
The pipe weight is 0.63 kg/m. The weight including water is 0.69 kg/m.
Which standard covers these dimensions?
These dimensions are based on ANSI / ASME B36.10.
Conclusion
Schedule 40 pipe 1/4 inch (DN8) is an important reference size for small-bore piping, drafting, fabrication, and engineering calculations. With an OD of 13.7 mm, ID of 9.22 mm, wall thickness of 2.24 mm, and weight of 0.63 kg/m, it is a useful standard pipe size for engineers, designers, and estimators working with steel piping systems.
For more pipe schedule data, compare this size with nearby standard sizes such as 3/8 inch and 1/2 inch Schedule 40 pipe pages.