This reference is intended for engineers, detailers, fabricators, estimators, and students checking NPS 3 1/2 Schedule 10S stainless steel pipe. Use the dimension table as the source for drawing preparation, material takeoffs, fit-up checks, and preliminary weight estimates.
For related reference work, compare this page with the site’s guides to pipe schedules, stainless steel pipe, and pipe fittings. These subjects help connect straight-pipe dimensions with the fittings, flanges, and terminology used in a complete piping model.
Schedule 10S pipe 3 1/2 inch (DN90) 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 1/2 Schedule 10S pipe based on ASME B36.19.
3 1/2 Inch Schedule 10S Pipe Dimensions
- Nominal Pipe Size (NPS): 3 1/2 inch
- Diameter Nominal (DN): DN90
- Outside Diameter (OD): 101.6 mm
- Wall Thickness: 3.05 mm
- Inside Diameter (ID): 95.5 mm
- Pipe Weight: 7.41 kg/m
- Pipe Weight Filled With Water: 14.56 kg/m
- Reference Standard: ASME B36.19
- Pipe Type: Stainless Steel Pipe
Schedule 10S Pipe 3 1/2 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 3 1/2 inch | 90 | 101.6 | 3.05 | 95.5 | 7.41 |
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 1/2 Inch Schedule 10S Pipe
NPS 3 1/2 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 1/2 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 1/2 inch Schedule 10S pipe?
The outside diameter is 101.6 mm.
What is the wall thickness of DN90 Schedule 10S pipe?
The wall thickness is 3.05 mm.
What is the inside diameter of NPS 3 1/2 Schedule 10S pipe?
The inside diameter is 95.5 mm.
How much does 3 1/2 inch Schedule 10S pipe weigh?
The approximate weight is 7.41 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 1/2 inch (DN90) has an outside diameter of 101.6 mm, wall thickness of 3.05 mm, inside diameter of 95.5 mm, and a weight of 7.41 kg/m. It is a useful reference for piping design, drafting, estimating, and stainless steel fabrication work.
How to Use This Pipe Reference
Begin with the nominal designation, then verify the outside diameter and wall thickness against the project drawing or material specification. The nominal size is a standardized identification, so it should not be treated as a direct measurement of the pipe’s inside diameter.
The listed inside diameter is useful when checking layout clearances, flow-area assumptions, and connections to compatible components. For detailed hydraulic, process, or mechanical calculations, confirm the actual product condition, tolerances, surface requirements, and material specification with the applicable project documents.
Schedule, Grade, and Design Checks
Schedule 10S identifies a dimensional wall-thickness designation for stainless steel pipe. It does not, by itself, define every material, corrosion, fabrication, testing, or service requirement. A complete design review may also require the material grade, joining method, temperature, pressure, corrosion allowance, and governing project code.
Do not use the tabulated pipe weight as a substitute for a verified support or structural calculation. The weight-per-meter value is useful for estimating and coordination, while filled-pipe loading, insulation, valves, fittings, supports, and operating conditions may need to be considered separately.
Using the CAD Download
The downloadable DWG can support drafting and layout coordination. Before incorporating it into a production drawing, check the file units, layer conventions, insertion point, end conditions, and compatibility with the project template. Confirm that the modeled dimensions agree with the authoritative table on this page before using the geometry for fabrication or procurement.
For connected components, continue to the site’s references for pipe flanges, butt-weld fittings, and pipe dimensions. Those references can help maintain consistent nominal-size terminology across piping plans, isometrics, spool drawings, and equipment connections.
Practical Questions About This Reference
Is the nominal size the same as the measured inside diameter?
No. The nominal size is a standardized pipe designation. Use the listed outside diameter, wall thickness, and inside diameter when a drawing or calculation requires dimensional information.
Does Schedule 10S specify the stainless steel grade?
No. The schedule describes the pipe’s dimensional designation. The material grade and other procurement requirements must be confirmed separately in the project specification or purchase documents.
Can the listed weight be used for support design?
It can support preliminary estimating and coordination, but a final support or structural review should also consider contents, insulation, fittings, valves, operating conditions, support arrangement, and applicable design requirements.
What should be checked before using the DWG file?
Check units, scale, layers, insertion settings, connection details, and the project CAD standard. Compare the drawing geometry with the dimension table before relying on it for fabrication or procurement.