This reference provides the dimensional and weight data needed to identify 3 inch Schedule 80S stainless steel pipe in drawings, takeoffs, procurement documents, and piping layouts. Use the table for the page’s authoritative values, then review the explanations below to understand how the schedule, NPS, DN, diameter, and weight information supports practical engineering work.
For related design checks, compare this reference with PipeSTD resources covering pipe schedules, stainless steel pipe dimensions, pipe fittings, flanges, and piping isometric terminology. The downloadable DWG can also support drafting and layout coordination, subject to project-specific verification.
Schedule 80S Pipe 3 Inch (DN80) 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 88.9 mm, an inside diameter of 73.66 mm, a wall thickness of 7.62 mm, and a pipe weight of 15.27 kg/m.
3 Inch Schedule 80S Pipe Dimensions
The following values are listed for NPS 3 Schedule 80S pipe, which corresponds to DN80 in metric designation.
- Pipe Size: NPS 3 Inch
- DN Size: DN80
- Outside Diameter (OD): 88.9 mm
- Inside Diameter (ID): 73.66 mm
- Wall Thickness: 7.62 mm
- Pipe Weight: 15.27 kg/m
- Pipe Weight Including Water: 19.52 kg/m
- Reference Standard: ANSI/ASME B36.19
Schedule 80S Pipe 3 Inch (DN80) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 80S | 3 Inch | 80 | 88.9 | 73.66 | 7.62 | 15.27 |
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 3 Inch Schedule 80S Pipe
3 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 3 and DN80 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 3 and DN80, which is the standard naming format widely used in piping drawings, isometrics, and procurement specifications.
Conclusion
Schedule 80S Pipe 3 Inch (DN80) is listed on the current page with 88.9 mm OD, 73.66 mm ID, 7.62 mm wall thickness, and 15.27 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 by confirming the required identification: NPS 3, DN80, and Schedule 80S. These labels should agree across the piping specification, material takeoff, purchase description, fabrication drawings, and applicable component references. The dimensions on this page then provide the basis for checking clearances, connections, fabrication details, and compatibility with related piping components.
Choosing the Right Dimension for the Task
- Outside diameter: useful for layout clearances, clamps, supports, sleeves, and connections that locate around the pipe.
- Inside diameter: relevant to flow-area review and internal passage considerations.
- Wall thickness: important for fabrication review, weld preparation, and confirmation that the specified pipe series has been selected.
- Pipe weight: useful for material takeoffs, handling, transport, support loading, and piping-system weight estimates.
- Weight including water: useful when considering an operating or filled condition rather than the empty pipe alone.
Coordination With Fittings, Flanges, and Supports
Pipe dimensions should not be reviewed in isolation. Fittings and flanges must be checked against the same nominal size, material requirements, pressure class, facing details, and project specification. Supports, clamps, penetrations, and equipment connections also require dimensional coordination. Use the related PipeSTD references for fittings and flanges as companion resources, while treating the project specification and approved engineering documents as controlling for final selection.
Using the DWG Download
The downloadable DWG is intended as a drafting reference for layout and coordination. Before incorporating it into a production drawing, confirm units, layer conventions, connection details, material callouts, tolerances, and the project’s CAD standards. A CAD representation should be checked against the authoritative table and the applicable piping documents rather than used as a substitute for engineering review.
Engineering Verification Before Procurement
Dimensional compatibility alone does not establish that a pipe is appropriate for a service. Final selection should be reviewed against pressure and temperature conditions, fluid compatibility, corrosion requirements, joining method, inspection requirements, support arrangement, and the specified material grade. Confirm the applicable standard and project requirements before ordering or fabricating.
Frequently Asked Questions
What does Schedule 80S mean?
Schedule 80S is a stainless steel pipe schedule designation associated with the dimensional reference identified on this page. For a given nominal pipe size, the schedule identifies a wall-thickness series used to coordinate design, procurement, fabrication, fittings, flanges, and supports.
Is DN80 the exact inside diameter?
No. DN80 is a nominal metric designation used to identify the pipe size. The actual inside diameter is a separate dimensional value and should be taken from the page data rather than inferred from the DN label.
What is the difference between NPS 3 and DN80?
NPS 3 is the nominal pipe-size designation in the inch-based system, while DN80 is the corresponding nominal designation used in metric terminology. Both labels identify the same pipe-size reference on this page; they do not replace the actual OD, ID, or wall-thickness values.
Why is pipe weight important?
Pipe weight supports material takeoffs, handling and transport planning, support-load estimates, and general piping layout review. The filled-pipe weight is a separate reference for conditions in which the pipe contains water.
Can this DWG be used directly for fabrication?
The DWG should be treated as a drafting and coordination reference. Verify its dimensions, units, connection requirements, material information, and project-specific details before using it for fabrication or issuing it in a production document.
What should be checked before selecting this pipe?
Review the service pressure, temperature, fluid, corrosion environment, material specification, joining requirements, inspection requirements, and compatibility with connected fittings and flanges. Final acceptance should follow the applicable project and engineering requirements.