Use this page as a quick reference when checking Schedule 10S pipe 1 1/4 inch (DN32) dimensions for piping layouts, fabrication documents, material estimates, and CAD work. The table below keeps the nominal size, outside diameter, wall thickness, inside diameter, and weight together so the data can be reviewed without confusing nominal pipe size with measured diameter.
For related design checks, compare this entry with the site’s pipe schedule reference, stainless steel pipe dimensions, and NPS-to-DN conversion guide. When documenting a connection, the pipe fittings dimension reference and flange dimensions guide can help keep adjoining components consistent.
Schedule 10S pipe 1 1/4 inch (DN32) 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 1 1/4 Schedule 10S pipe based on ASME B36.19.
1 1/4 Inch Schedule 10S Pipe Dimensions
- Nominal Pipe Size (NPS): 1 1/4 inch
- Diameter Nominal (DN): DN32
- Outside Diameter (OD): 42.2 mm
- Wall Thickness: 2.77 mm
- Inside Diameter (ID): 36.66 mm
- Pipe Weight: 2.69 kg/m
- Pipe Weight Filled With Water: 3.74 kg/m
- Reference Standard: ASME B36.19
- Pipe Type: Stainless Steel Pipe
Schedule 10S Pipe 1 1/4 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 1 1/4 inch | 32 | 42.2 | 2.77 | 36.66 | 2.69 |
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 “S” designation is commonly used for stainless steel pipe schedules.
Typical Uses of 1 1/4 Inch Schedule 10S Pipe
NPS 1 1/4 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.
1 1/4 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 1 1/4 inch Schedule 10S pipe?
The outside diameter is 42.2 mm.
What is the wall thickness of DN32 Schedule 10S pipe?
The wall thickness is 2.77 mm.
What is the inside diameter of NPS 1 1/4 Schedule 10S pipe?
The inside diameter is 36.66 mm.
How much does 1 1/4 inch Schedule 10S pipe weigh?
The approximate weight is 2.69 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 1 1/4 inch (DN32) has an outside diameter of 42.2 mm, wall thickness of 2.77 mm, inside diameter of 36.66 mm, and a weight of 2.69 kg/m. It is a useful reference for piping design, drafting, estimating, and stainless steel fabrication work.
How to Read This Schedule 10S Reference
NPS 1 1/4 and DN32 identify the nominal pipe size; they are not interchangeable with the measured outside or inside diameter. For layout and drafting, the outside diameter is the key envelope dimension. The wall thickness helps describe the pipe section, while the inside diameter is the useful opening dimension shown in the source data.
The schedule designation identifies a stainless steel pipe wall-thickness series under the referenced dimensional standard. It should not be treated as a complete material, pressure, or service specification. Final selection still requires checking the project specification, material grade, applicable product requirements, joining method, and engineering conditions.
Using the Dimensions in Design and Drafting
- Use the outside diameter when coordinating clearances, clamps, sleeves, supports, and fitting interfaces.
- Use the inside diameter when reviewing the available flow passage or checking compatibility with internal components.
- Use the weight per meter for preliminary handling, transport, support, and material takeoff work; verify final values against the purchased product and project requirements.
- Use the downloadable Schedule 10S pipe DWG reference when a CAD starting point is more useful than a text-only dimension check.
Related Pipe Reference Topics
Readers comparing nearby sizes can continue to the pipe dimensions reference or review pipe wall thickness terminology. For a complete piping document, pair dimensional data with the applicable pipe support reference, piping terminology guide, and project-specific specifications.
Additional Questions About This Reference
Are NPS 1 1/4 and DN32 the same measured diameter?
No. They are nominal size designations used to identify the pipe size. The measured outside and inside diameters are the separate dimensions listed in the table.
Can the Schedule 10S designation alone establish allowable pressure?
No. A schedule identifies a dimensional wall series, but allowable pressure depends on additional engineering and product factors. Confirm the complete design basis before using the pipe in a pressure-containing system.
Which dimension should be used for a CAD clearance check?
Use the outside diameter for the pipe’s external envelope. Include any fittings, welds, insulation, coatings, supports, or other project-specific additions that affect the final clearance.
Does the listed weight replace a procurement value?
No. The listed value is a reference for the stated dimensions. Confirm the supplier’s product data, tolerances, material grade, and purchasing basis for final procurement or detailed fabrication calculations.
Where can I find the CAD file for this pipe reference?
The downloadable DWG associated with this page provides a starting point for drafting. Check the drawing against the project’s required units, tolerances, connection details, and document-control requirements before issuing it for construction.