Use this reference when you need to identify, check, or document 3/4 inch Schedule 10S stainless steel pipe in a piping layout, material takeoff, fabrication drawing, or CAD model. The table below separates nominal size from the actual outside diameter, wall thickness, inside diameter, and linear weight so each value can be used for the right design or drafting task.
For broader comparison work, pair this page with the site’s references on pipe schedules, NPS and DN pipe sizing, stainless steel pipe dimensions, and pipe weight calculations. Those topics help explain how this individual size fits into a complete piping specification.
Schedule 10S pipe 3/4 inch (DN20) is a stainless steel pipe size commonly used in piping design, fabrication, drafting, and engineering reference work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 3/4 Schedule 10S pipe based on ASME B36.19.
3/4 Inch Schedule 10S Pipe Dimensions
- Nominal Pipe Size (NPS): 3/4 inch
- Diameter Nominal (DN): DN20
- Outside Diameter (OD): 26.7 mm
- Wall Thickness: 2.11 mm
- Inside Diameter (ID): 22.48 mm
- Pipe Weight: 1.28 kg/m
- Pipe Weight Filled With Water: 1.67 kg/m
- Reference Standard: ASME B36.19
- Pipe Type: Stainless Steel Pipe
Schedule 10S Pipe 3/4 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 3/4 inch | 20 | 26.7 | 2.11 | 22.48 | 1.28 |
What Does Schedule 10S Mean?
Schedule 10S is a stainless steel pipe schedule covered by ASME B36.19. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes with the schedule. The āSā designation is commonly used for stainless steel pipe schedules.
Typical Uses of 3/4 Inch Schedule 10S Pipe
NPS 3/4 Schedule 10S pipe is commonly used in stainless steel piping systems for industrial plants, utility services, food and beverage facilities, water-related systems, and fabrication work where corrosion resistance and dimensional accuracy are important.
Why Pipe Weight Matters
Pipe weight per meter is useful for transport planning, lifting studies, support design, structural loading, fabrication estimates, and installation planning. In stainless steel piping systems, accurate weight data helps improve material handling, support spacing, and total project cost estimation.
3/4 Inch Schedule 10S Pipe Calculation Notes
The listed weight is based on standard stainless steel pipe dimensions 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 3/4 inch Schedule 10S pipe?
The outside diameter is 26.7 mm.
What is the wall thickness of DN20 Schedule 10S pipe?
The wall thickness is 2.11 mm.
What is the inside diameter of NPS 3/4 Schedule 10S pipe?
The inside diameter is 22.48 mm.
How much does 3/4 inch Schedule 10S pipe weigh?
The approximate weight is 1.28 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.19 for stainless steel pipe.
Conclusion
Schedule 10S pipe 3/4 inch (DN20) has an outside diameter of 26.7 mm, wall thickness of 2.11 mm, inside diameter of 22.48 mm, and a weight of 1.28 kg/m. It is a useful reference for piping design, drafting, estimating, and stainless steel fabrication work.
How to Use This Pipe Reference
The nominal designation identifies the size convention used for ordering and specifying the pipe; it is not a direct measurement of the pipe’s outside or inside diameter. For fabrication and CAD work, use the listed outside diameter when modeling the pipe envelope, and use the wall thickness and inside diameter when checking clearances, connections, or flow passages.
Schedule describes a wall-thickness designation within the applicable stainless steel pipe dimension standard. It should not be treated as a standalone pressure rating. Pressure capability also depends on factors such as material grade, temperature, design code, manufacturing requirements, joining method, corrosion allowance, and the engineering basis of the piping system.
Drafting and Procurement Notes
- Keep the NPS, DN, schedule, material specification, and applicable standard together in the pipe description so the item is not confused with a similarly named size.
- Use the outside diameter for layout envelopes, support interfaces, clamps, sleeves, and connection coordination.
- Use the inside diameter for clearance and process-side checks, while recognizing that fittings, welds, tolerances, and internal components may affect the usable passage.
- Use the listed linear weight for preliminary takeoffs and handling studies. Final support and structural checks should include the complete installed condition, including contents, fittings, valves, insulation, and other attached loads where applicable.
- Before fabrication, confirm that the selected product, material grade, end condition, dimensional tolerance, and supplier documentation match the project specification.
CAD and Related Reference Work
The downloadable DWG is useful for starting a layout or checking the dimensional envelope in a drawing. A CAD block does not replace the project specification: verify units, insertion scale, connection details, and the required level of fabrication definition before issuing a model or drawing.
Useful related internal references include stainless steel pipe schedules, pipe flange dimensions, butt-weld fitting dimensions, pipe support design considerations, and pipe terminology. Linking these topics from this page gives readers a practical path from a single pipe size to complete piping-system coordination.
Additional Practical Questions
Is Schedule 10S the same as a pressure class?
No. Schedule 10S identifies a stainless steel pipe wall-thickness designation in the referenced dimensional system. It does not by itself establish an allowable pressure for every service condition.
Why are both NPS and DN shown?
NPS and DN are related nominal size designations used in different measurement conventions and project documents. Showing both helps users match drawings, specifications, catalogs, and procurement records.
Which dimension should be used for a CAD pipe outline?
Use the listed outside diameter for the external pipe envelope. Add fittings, welds, flanges, supports, and clearances separately when developing a coordinated model.
Can the listed weight be used as the final installed pipe load?
It is a reference for the pipe itself. Final installed-load calculations should account for the actual product, contents, fittings, valves, insulation, supports, and project-specific design requirements.
What should be checked before ordering?
Confirm the nominal size, schedule, material grade, applicable standard, product form, end preparation, dimensional tolerances, documentation, and supplier requirements against the project specification.