Need a quick reference for small-bore steel pipe dimensions? This page brings together the key dimensional and weight data for NPS 3/8 Schedule 30 pipe, also identified as DN10. Use the table and summary values for piping layouts, CAD drawings, material takeoffs, and preliminary load reviews.
When using the data in a project, distinguish between nominal size and measured geometry. The nominal designations identify the pipe size category, while the listed outside diameter, inside diameter, and wall thickness support layout and coordination work. The downloadable DWG can also help CAD users begin a drawing or check clearances before detailed design review.
Schedule 30 pipe 3/8 inch (DN10) is a small steel pipe size commonly used in piping design, drafting, fabrication, estimation, and utility layout work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 3/8 Schedule 30 pipe based on ASME B36.10.
For engineers, designers, estimators, and CAD users, quick access to accurate pipe data helps improve piping layout, support planning, weight checks, material takeoff, and fabrication coordination during project development.
3/8 Inch Schedule 30 Pipe Dimensions
- Nominal Pipe Size (NPS): 3/8 inch
- Diameter Nominal (DN): DN10
- Outside Diameter (OD): 17.1 mm
- Wall Thickness: 1.85 mm
- Inside Diameter (ID): 13.4 mm
- Pipe Weight: 0.7 kg/m
- Pipe Weight Including Water: 0.84 kg/m
- Standard: ASME B36.10
Schedule 30 Pipe 3/8 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 3/8 inch | DN10 | 17.1 mm | 1.85 mm | 13.4 mm | 0.7 kg/m |
Understanding 3/8 Inch Schedule 30 Pipe
3/8 inch Schedule 30 pipe is a standard steel pipe size used as a reference in industrial piping layouts, utility systems, small water lines, process design studies, and CAD drafting. With an outside diameter of 17.1 mm and a wall thickness of 1.85 mm, this pipe size is suitable for light piping applications where compact dimensions and standard wall thickness data are important.
What Does Schedule 30 Mean?
Schedule 30 refers to the wall thickness series of the pipe. For NPS 3/8, Schedule 30 gives a wall thickness of 1.85 mm. The schedule affects the inside diameter, total pipe weight, fabrication planning, and compatibility with supports, fittings, and installation requirements.
Why These Pipe Dimensions Matter
Accurate pipe dimension data is important for piping layouts, spool drawings, support design, structural load review, and material takeoff. Knowing that this pipe weighs 0.7 kg/m helps with transport estimates, support planning, and quantity calculations. If the pipe is filled with water, the total weight increases to 0.84 kg/m, which is useful for operating load checks.
Common Uses of DN10 Schedule 30 Pipe
DN10 Schedule 30 pipe may be referenced in utility systems, small process lines, plant layout studies, piping documentation, and engineering design work. It is also useful for piping designers, CAD users, estimators, and procurement teams who need standard steel pipe dimensions for small-bore piping systems.
Difference Between NPS 3/8 and DN10
NPS 3/8 is the inch-based nominal pipe size designation, while DN10 is the metric nominal diameter reference. Both refer to the same pipe size category on this page. The actual standard outside diameter for this size is 17.1 mm.
How to Use This Data
You can use this page to quickly check:
- pipe outside diameter for layout and clearance
- inside diameter for flow reference
- wall thickness for schedule comparison
- weight per meter for estimation and transport planning
- water-filled weight for support and structural load review
Quick Reference for Schedule 30 Pipe 3/8 Inch
- Pipe Size: 3/8 inch
- DN: DN10
- OD: 17.1 mm
- ID: 13.4 mm
- Wall Thickness: 1.85 mm
- Weight: 0.7 kg/m
- Weight Including Water: 0.84 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 30 Pipe 3/8 Inch (DN10) is an important small steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 17.1 mm outside diameter, 1.85 mm wall thickness, and 0.7 kg/m pipe weight, it provides useful dimensional data for engineers and designers who need fast and accurate pipe information.
Note: NPS = Nominal Pipe Size, DN = Diameter Nominal. Dimensions and weights shown here are based on ASME B36.10 steel pipe data.
How to Read This Pipe Reference
The most useful dimensions depend on the task. Use the outside diameter when checking physical clearances, pipe penetrations, clamps, and fitting interfaces. Use the inside diameter as a dimensional reference for bore and flow-related discussions. The wall thickness identifies the Schedule 30 configuration and helps distinguish it from other schedule selections for the same nominal size.
Dimensions, Weight, and Design Coordination
Pipe weight is relevant to material estimates, handling, support coordination, and preliminary structural review. The water-filled weight is a separate operating-condition reference; it should not be confused with the empty pipe weight. Actual design checks may also require consideration of insulation, coatings, valves, fittings, contents other than water, supports, thermal effects, and project-specific requirements.
Nominal Size Versus Actual Size
NPS 3/8 and DN10 are nominal designations rather than direct statements of the pipe’s measured outside diameter. For drafting and layout, use the listed OD and ID instead of treating the nominal label as a measured dimension. This distinction is particularly important when coordinating small-bore pipe with fittings, equipment connections, supports, and nearby services.
Using the DWG Resource
The attached DWG is useful as a drafting reference for a Schedule 30 Pipe 3/8 Inch (DN10) layout. Confirm units, drawing scale, layer conventions, connection details, and project modeling requirements before incorporating downloaded geometry into production documents. The dimensional table on this page remains the controlling local reference for the values presented here.
Related Size Comparisons
For nearby nominal sizes, compare this page with the Schedule 30 Pipe 1/4 Inch (DN8) and Schedule 30 Pipe 1/2 Inch (DN15) references. Comparing adjacent entries can help with preliminary routing, space checks, and material takeoff organization, but final selection should follow the applicable project design basis.
Frequently Asked Questions
What is the outside diameter of 3/8 inch Schedule 30 pipe?
The listed outside diameter is 17.1 mm.
What is the inside diameter of DN10 Schedule 30 pipe?
The listed inside diameter is 13.4 mm.
What wall thickness does Schedule 30 provide for NPS 3/8?
For the pipe size covered on this page, Schedule 30 has a listed wall thickness of 1.85 mm.
How much does this pipe weigh?
The listed pipe weight is 0.7 kg/m. The listed weight including water is 0.84 kg/m, which is useful as a reference for a water-filled condition.
Are NPS 3/8 and DN10 the same designation?
They are the inch-based and metric nominal references for the same pipe size category shown here. Use the listed actual dimensions for layout and coordination.
Can this data be used for final pipe design?
This page is a dimensional and weight reference. Final pipe selection and design checks should also address the service, material, pressure and temperature requirements, joining method, supports, loads, and applicable project specifications.