This reference provides the dimensional and weight data for NPS 1 1/2 Schedule 80S stainless steel pipe, also identified as DN40. Use the table for quick checks during piping layout, material takeoff, procurement, and drafting, then review the terminology and application notes before using the data in a project.
The downloadable DWG file can support preliminary CAD coordination. For broader design work, compare this page with related references on stainless steel pipe schedules, NPS and DN designations, pipe fittings and flanges, and pipe weight calculations. These cross-references help maintain dimensional compatibility between straight pipe, connected components, and support details.
Schedule 80S Pipe 1 1/2 Inch (DN40) 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 48.3 mm, an inside diameter of 38.14 mm, a wall thickness of 5.08 mm, and a pipe weight of 5.41 kg/m.
1 1/2 Inch Schedule 80S Pipe Dimensions
The following values are listed for NPS 1 1/2 Schedule 80S pipe, which corresponds to DN40 in metric designation.
- Pipe Size: NPS 1 1/2 Inch
- DN Size: DN40
- Outside Diameter (OD): 48.3 mm
- Inside Diameter (ID): 38.14 mm
- Wall Thickness: 5.08 mm
- Pipe Weight: 5.41 kg/m
- Pipe Weight Including Water: 6.55 kg/m
- Reference Standard: ANSI/ASME B36.19
Schedule 80S Pipe 1 1/2 Inch (DN40) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 80S | 1 1/2 Inch | 40 | 48.3 | 38.14 | 5.08 | 5.41 |
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 1/2 Inch Schedule 80S Pipe
1 1/2 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 1/2 and DN40 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 1/2 and DN40, which is the standard naming format widely used in piping drawings, isometrics, and procurement specifications.
Conclusion
Schedule 80S Pipe 1 1/2 Inch (DN40) is listed on the current page with 48.3 mm OD, 38.14 mm ID, 5.08 mm wall thickness, and 5.41 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 Read This Schedule 80S Pipe Reference
The page separates nominal identification from measured dimensions. NPS 1 1/2 is the inch-based nominal designation, while DN40 is its metric designation in this reference. The nominal size should not be treated as the measured outside diameter; use the listed OD when checking layout clearances, clamps, supports, fittings, or flange connections.
Schedule, material, and dimensional checks
Schedule 80S identifies a stainless steel wall-thickness series. It is a dimensional designation rather than a complete material specification, corrosion allowance, pressure rating, or fabrication instruction. Project documents still need to establish the applicable stainless steel grade, service conditions, joining requirements, inspection requirements, and design limits.
For drafting and coordination, check the listed outside diameter against connection and support geometry. Use the inside diameter when reviewing flow area or internal clearance. The listed wall thickness is relevant to welding preparation, machining allowances, and dimensional inspection. The listed pipe weight can support preliminary material takeoffs, handling reviews, and piping-support load estimates, but a complete design load review may also need to consider contents, insulation, valves, fittings, and other attached items.
Practical Cross-Checks Before Using the Data
- Confirm that the project specification calls for stainless steel pipe and the Schedule 80S dimensional series.
- Match the pipe OD and schedule with the selected fittings, flanges, valves, and branch connections.
- Use the page’s pipe weight and water-inclusive weight entries according to the purpose of the calculation.
- Check whether the piping system requires additional review for pressure, temperature, fluid compatibility, corrosion, supports, or installation loads.
- For CAD work, compare the DWG geometry with the project model and the manufacturer’s connection details before fabrication.
Useful related internal references include a guide to pipe schedule terminology, a comparison of stainless steel and carbon steel pipe dimensions, and pages covering flange dimensions and butt-weld fittings. Linking these topics from this page gives readers a practical path from pipe selection to complete piping-component coordination.
Frequently Asked Questions
What is the nominal size of this Schedule 80S pipe?
The pipe is identified as NPS 1 1/2 and DN40. These are nominal designations used in piping drawings, specifications, and procurement documents.
Is Schedule 80S a material grade?
No. Schedule 80S describes a stainless steel pipe dimensional series. The stainless steel grade and other material requirements must be confirmed from the project specification or purchase documents.
Which dimensions should be used for CAD coordination?
Use the listed outside diameter, inside diameter, and wall thickness for the relevant coordination checks. The downloadable DWG can assist with preliminary drafting, but connection details and project-specific requirements should be verified before fabrication.
Why is pipe weight important?
Pipe weight supports preliminary material takeoffs, transport planning, lifting reviews, and piping-support load estimates. The complete installed load may also include fluid, insulation, fittings, valves, and other attached components.
Can this page alone establish whether the pipe is suitable for a service?
No. The dimensional reference does not replace engineering verification. Final selection should be checked against the service fluid, pressure, temperature, material specification, joining method, corrosion requirements, and applicable project design rules.