This reference page provides the dimensional and weight data used to identify Schedule 80S Pipe 1 1/4 Inch (DN32) in piping layouts, material take-offs, procurement documents, and fabrication work. Use the table as the primary dimensional reference, then confirm the project material specification, service conditions, and applicable purchasing requirements before placing an order.
The page also explains how NPS, DN, pipe schedule, outside diameter, inside diameter, and wall thickness relate to one another. For drawing and drafting workflows, the available DWG file can support layout development, subject to checking the downloaded geometry against the project’s design documents.
Schedule 80S Pipe 1 1/4 Inch (DN32) is a stainless steel pipe size commonly used in industrial piping systems where corrosion resistance, dimensional consistency, and dependable wall thickness are important. Based on the current page data under ANSI/ASME B36.19, this pipe size has an outside diameter of 42.2 mm, an inside diameter of 32.5 mm, a wall thickness of 4.85 mm, and a pipe weight of 4.47 kg/m.
1 1/4 Inch Schedule 80S Pipe Dimensions
The following values are listed for NPS 1 1/4 Schedule 80S pipe, which corresponds to DN32 in metric designation.
- Pipe Size: NPS 1 1/4 Inch
- DN Size: DN32
- Outside Diameter (OD): 42.2 mm
- Inside Diameter (ID): 32.5 mm
- Wall Thickness: 4.85 mm
- Pipe Weight: 4.47 kg/m
- Pipe Weight Including Water: 5.29 kg/m
- Reference Standard: ANSI/ASME B36.19
Schedule 80S Pipe 1 1/4 Inch (DN32) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 80S | 1 1/4 Inch | 32 | 42.2 | 32.5 | 4.85 | 4.47 |
What Is Schedule 80S Pipe?
Schedule 80S is a stainless steel pipe schedule designation commonly used under ASME B36.19. In piping design and fabrication, the schedule identifies the wall thickness series for a given nominal pipe size. This helps engineers, buyers, and fabricators confirm dimensional compatibility, estimate pipe weight, and coordinate with fittings, flanges, and supports.
Common Uses of 1 1/4 Inch Schedule 80S Pipe
1 1/4 inch Schedule 80S pipe is commonly used in stainless steel piping systems that require good corrosion resistance, dependable wall thickness, and reliable flow capacity. This size is often selected for industrial projects where standard dimensions are needed for design, fabrication, procurement, and installation work.
- Process piping systems in chemical and industrial plants
- Water transmission lines for industrial and utility service
- Cooling water and utility piping in plant facilities
- Marine and offshore piping where stainless steel is preferred
- Food and beverage plants requiring corrosion-resistant piping materials
- Pharmaceutical facilities using stainless steel process lines
- Pump suction and discharge piping for process and utility systems
- Pipeline modification and replacement work where standard pipe dimensions are required
In practical engineering work, this pipe size may be checked when reviewing flow area, piping layout, support loading, transport weight, and installation requirements. Final pipe selection should always be verified against project pressure, temperature, fluid type, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for pipe support design, material take-off, transport planning, welding preparation, and installation work. Weight data is also useful for lifting calculations and total piping load estimates, while inside diameter affects flow calculations and system capacity review.
NPS 1 1/4 and DN32 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. The current page identifies this pipe as NPS 1 1/4 and DN32, which is the standard naming format widely used in piping drawings, isometrics, and procurement specifications.
Conclusion
Schedule 80S Pipe 1 1/4 Inch (DN32) is listed on the current page with 42.2 mm OD, 32.5 mm ID, 4.85 mm wall thickness, and 4.47 kg/m weight. It is a useful stainless steel pipe reference for piping engineers, designers, and buyers who need standard dimensional and weight data for project planning and material selection.
How to Use This Pipe Reference
Start with the nominal identification: NPS 1 1/4 and DN32 describe the same nominal pipe size in inch-based and metric terminology. The schedule identifies the stainless steel wall-thickness series listed for that nominal size. The actual outside diameter, inside diameter, and wall thickness shown in the data table should be used when checking clearances, joining details, fittings, supports, and drawing geometry.
These dimensions are not interchangeable with a pressure rating. A complete piping check also considers the material grade, design temperature, fluid, corrosion allowance, joining method, component ratings, and governing project requirements. Schedule selection should therefore be coordinated with the engineering design rather than treated as a standalone approval for service.
Drafting and Procurement Checks
- Use the outside diameter when coordinating clamps, sleeves, supports, penetrations, and connection geometry.
- Use the inside diameter when reviewing flow-area assumptions or comparing the pipe with valves and other components.
- Use wall thickness when checking weld preparation, fabrication details, and compatibility with connected components.
- Use pipe weight for material take-offs, handling plans, support-load estimates, and shipping calculations.
- Confirm that fittings, flanges, valves, and gaskets are specified for the same nominal size and compatible stainless steel requirements.
For broader design research, this page can be used alongside references covering pipe schedules, stainless steel pipe dimensions, pipe fittings, flanges, and piping isometric drafting. Those related resources help connect the tabulated pipe dimensions with the components and drawings used in a complete piping system.
CAD File Use
The linked DWG resource is useful as a drafting starting point for layouts, equipment connections, and piping coordination. Treat downloaded CAD geometry as a reference asset: verify units, layer conventions, connection details, and project-specific tolerances before incorporating it into issued drawings.
Frequently Asked Questions
What does 80S mean in this pipe description?
80S is the stainless steel pipe schedule designation listed for this nominal size. It identifies a wall-thickness series and helps coordinate the pipe with compatible fittings, flanges, supports, and fabrication details.
Are NPS 1 1/4 and DN32 the same pipe size?
They are the inch-based and metric nominal designations identified for this pipe reference. The nominal labels do not replace the tabulated outside diameter, inside diameter, or wall thickness when detailed coordination is required.
Does Schedule 80S determine the allowable pressure?
No. The schedule provides dimensional information, but allowable pressure depends on additional factors such as material specification, temperature, fluid service, corrosion considerations, joining details, and the applicable design requirements.
Why are both pipe weight and pipe weight including water shown?
The dry pipe weight supports material, handling, and support-load estimates. The value including water provides a different operating-load reference for applications where the pipe is filled, but the final load assessment should also consider insulation, valves, fittings, supports, and other attached items.
Can the DWG file be used directly for construction?
The DWG file is a reference resource for drafting and coordination. Check its units, geometry, connection information, and project requirements before using it in fabrication or issued construction documents.