This reference provides the dimensional and weight data needed to identify 5 inch Schedule 80S stainless steel pipe in drawings, material take-offs, procurement documents, and fabrication work. It also explains how the NPS, DN, outside diameter, inside diameter, wall thickness, and weight relate to practical piping decisions.
Use the dimensional table below as the page’s local reference data, then compare it with related information on pipe schedules, stainless steel pipe dimensions, pipe fittings and flanges, and piping isometric drawings when coordinating a complete piping system. The downloadable DWG can support drafting and layout review, but project specifications and engineering checks remain necessary before fabrication or installation.
Schedule 80S Pipe 5 Inch (DN125) 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 141.3 mm, an inside diameter of 122.24 mm, a wall thickness of 9.53 mm, and a pipe weight of 30.97 kg/m.
5 Inch Schedule 80S Pipe Dimensions
The following values are listed for NPS 5 Schedule 80S pipe, which corresponds to DN125 in metric designation.
- Pipe Size: NPS 5 Inch
- DN Size: DN125
- Outside Diameter (OD): 141.3 mm
- Inside Diameter (ID): 122.24 mm
- Wall Thickness: 9.53 mm
- Pipe Weight: 30.97 kg/m
- Pipe Weight Including Water: 42.69 kg/m
- Reference Standard: ANSI/ASME B36.19
Schedule 80S Pipe 5 Inch (DN125) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 80S | 5 Inch | 125 | 141.3 | 122.24 | 9.53 | 30.97 |
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 5 Inch Schedule 80S Pipe
5 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 5 and DN125 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 5 and DN125, which is the standard naming format widely used in piping drawings, isometrics, and procurement specifications.
Conclusion
Schedule 80S Pipe 5 Inch (DN125) is listed on the current page with 141.3 mm OD, 122.24 mm ID, 9.53 mm wall thickness, and 30.97 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 5 Inch Schedule 80S Reference
The values on this page serve different coordination purposes. The outside diameter is important when checking clearances, clamps, sleeves, fittings, and flange interfaces. The inside diameter is used when reviewing flow area and equipment connections. The wall thickness helps identify the pipe section for fabrication and compatibility checks, while the listed pipe weight supports material take-offs, handling plans, and preliminary support-load reviews.
The listed weight including water is a separate reference from the dry pipe weight. It can help indicate how service contents may affect preliminary load consideration, although a complete support or structural review may also need to account for insulation, valves, fittings, fluid properties, testing conditions, and project-specific requirements.
Schedule, Nominal Size, and Actual Dimensions
Schedule 80S identifies a stainless steel wall-thickness series for the nominal pipe size; it is not a complete pressure-rating statement by itself. Pressure and temperature suitability must be verified using the applicable material, design code, joining method, corrosion requirements, and project specification.
NPS 5 and DN125 are naming designations used to identify the same pipe size on piping drawings and procurement documents. Because nominal size is a designation rather than a direct statement of every measured dimension, fabrication and coordination work should use the OD, ID, and wall-thickness data shown on this page.
Coordination With Fittings, Flanges, and Supports
Before selecting connected components, check that the pipe dimensions correspond with the intended butt-weld fittings, flanges, valves, reducers, and branch connections. The pipe’s OD is particularly important for welded joints and external clearances, while the ID may matter at transitions to equipment nozzles or flow-sensitive components.
For layout work, pair this reference with the project’s piping isometrics, support details, and the available DWG download. For estimating and procurement, compare the listed pipe weight with the bill of materials and confirm whether the project requires dry pipe weight, operating load, or another defined basis.
Selection Checks Before Use
- Confirm that the pipe material and corrosion resistance match the service specification.
- Verify pressure, temperature, fluid, joining, and inspection requirements before approval.
- Coordinate the dimensions with fittings, flanges, valves, equipment nozzles, and supports.
- Use the listed weight consistently in take-offs and preliminary handling or support reviews.
- Check the downloaded CAD file against the project’s drawing units, tolerances, and revision controls.
Frequently Asked Questions
What are the dimensions of 5 inch Schedule 80S pipe?
The page lists an outside diameter of 141.3 mm, an inside diameter of 122.24 mm, and a wall thickness of 9.53 mm for NPS 5 Schedule 80S pipe.
What is the DN designation for 5 inch Schedule 80S pipe?
The corresponding metric designation shown on this page is DN125.
What is the listed weight of 5 inch Schedule 80S pipe?
The listed pipe weight is 30.97 kg/m. The page separately lists 42.69 kg/m for pipe weight including water.
Does Schedule 80S alone establish the pipe pressure rating?
No. Schedule 80S identifies the wall-thickness series for the nominal pipe size, but pressure and temperature suitability also depend on the material, design requirements, service conditions, joining details, and applicable project rules.
Where is 5 inch Schedule 80S pipe used?
The source page identifies applications including industrial process piping, water and utility systems, cooling water, marine and offshore service, food and beverage facilities, pharmaceutical facilities, pump connections, and replacement work. Final selection should be checked against the actual project service and specification.
Can the DWG file be used directly for fabrication?
The DWG is useful for drafting and layout coordination. Before fabrication, verify its dimensions, units, revision status, connection details, and project-specific requirements against the authoritative engineering documents.