This reference page summarizes the key dimensional and weight information for Schedule 10 pipe 3/8 inch (DN10). It is intended for engineers, designers, fabricators, estimators, and CAD users who need a compact source for small-bore steel pipe data.
Use the dimensional data below when checking a piping layout, preparing a material takeoff, selecting compatible fittings, or creating a drawing. For related work, connect this reference with the site’s resources on pipe schedules, nominal pipe size, pipe fittings, flange dimensions, and piping isometric drafting.
Schedule 10 pipe 3/8 inch (DN10) is a small-size steel pipe 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 3/8 Schedule 10 pipe based on ASME B36.10.
3/8 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 3/8 inch
- Diameter Nominal (DN): DN10
- Outside Diameter (OD): 17.1 mm
- Wall Thickness: 1.65 mm
- Inside Diameter (ID): 13.8 mm
- Pipe Weight: 0.63 kg/m
- Pipe Weight Filled With Water: 0.77 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 3/8 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 3/8 inch | 10 | 17.1 | 1.65 | 13.8 | 0.63 |
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 3/8 Inch Schedule 10 Pipe
NPS 3/8 Schedule 10 pipe is commonly used in utility systems, instrument-related small-bore piping, low-pressure service lines, 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 small piping systems, installed weight can affect support spacing, handling methods, and total material cost.
3/8 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 3/8 inch Schedule 10 pipe?
The outside diameter is 17.1 mm.
What is the wall thickness of DN10 Schedule 10 pipe?
The wall thickness is 1.65 mm.
What is the inside diameter of NPS 3/8 Schedule 10 pipe?
The inside diameter is 13.8 mm.
How much does 3/8 inch Schedule 10 pipe weigh?
The approximate weight is 0.63 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 3/8 inch (DN10) has an outside diameter of 17.1 mm, wall thickness of 1.65 mm, inside diameter of 13.8 mm, and a weight of 0.63 kg/m. It is a useful reference for piping design, drafting, estimating, and fabrication work.
How to Read This Pipe Reference
The table separates the nominal designation from the physical dimensions. NPS 3/8 and DN10 identify the nominal size, while outside diameter, wall thickness, and inside diameter describe the actual pipe geometry listed for this schedule.
When checking a drawing, start with the outside diameter because it affects fit-up, clamps, supports, sleeves, and connections to fittings. Wall thickness is useful for fabrication review and for distinguishing this schedule from other wall series. Inside diameter is the practical flow-path dimension shown by the reference data, although the final usable bore can also depend on fittings, welds, coatings, and internal features.
Using the Data in Design and Drafting
- Use the outside diameter when coordinating pipe routing with supports, penetrations, and adjacent equipment.
- Use the wall thickness when reviewing fabrication details, end preparation, and compatibility with the selected pipe specification.
- Use the inside diameter when making a preliminary flow-area or clearance check; confirm the complete system geometry before final calculations.
- Use the listed mass per meter for material estimates and preliminary support or handling reviews.
The schedule designation is not, by itself, a pressure rating or a complete material specification. Final selection should also account for material grade, joining method, service conditions, corrosion allowance, applicable piping code, and supplier documentation. Confirm the project requirements with the responsible engineer before using this data for fabrication or pressure design.
Related Reference Topics
This page works well alongside a general pipe schedule chart, an NPS-to-DN size guide, a steel pipe weight reference, and dimensional pages for compatible small-bore fittings and flanges. These related references help keep nominal size, connection geometry, and estimated installed weight consistent across a piping model or drawing set.
Additional Questions About This Reference
Is DN10 the same as the measured outside diameter?
No. DN10 is a nominal designation, not a direct statement of the measured outside diameter. Use the listed outside diameter for layout, coordination, and connection checks.
Can this page be used to select a pipe for any service?
No. The dimensions are a reference for the stated pipe size and schedule. Service selection also requires review of material, temperature, pressure, corrosion, joining, code, and project specifications.
Why can supplier weight differ from the listed value?
The listed value is a reference weight based on the stated pipe dimensions. Actual supplied weight may vary because of manufacturing tolerances, material condition, product specification, and supplier practices.
What should be checked before ordering fittings?
Check the nominal size, outside diameter, wall thickness, connection type, material, end preparation, and the applicable fitting or component standard. Do not rely on nominal size alone when verifying fit-up.
Is the water-filled weight the same as the installed operating load?
No. The water-filled figure is a reference condition. An installed load review may also need to consider valves, fittings, insulation, supports, contents other than water, thermal effects, and other attached components.