This reference provides the dimensional and weight data needed to identify Schedule STD Pipe 1 1/2 Inch (DN40) in piping drawings, material takeoffs, procurement documents, and fabrication planning. Use the table to distinguish the nominal designation from the measured outside diameter, inside diameter, wall thickness, and unit weight.
For related design work, compare this page with PipeSTD resources covering pipe schedules, NPS and DN conversions, pipe fittings, flange dimensions, and steel pipe weight calculations. These related references help maintain consistent terminology when a pipe is coordinated with connected components.
Schedule STD Pipe 1 1/2 Inch (DN40) is a steel pipe size commonly used in industrial and utility piping systems where standard dimensions, structural reliability, and dependable flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 48.3 mm, an inside diameter of 40.94 mm, a wall thickness of 3.68 mm, and a pipe weight of 4.05 kg/m.
1 1/2 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 1 1/2 Schedule STD 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): 40.94 mm
- Wall Thickness: 3.68 mm
- Pipe Weight: 4.05 kg/m
- Pipe Weight Including Water: 5.36 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 1 1/2 Inch (DN40) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 1 1/2 Inch | 40 | 48.3 | 40.94 | 3.68 | 4.05 |
What Is Schedule STD Pipe?
Schedule STD means Standard Weight in the IPS pipe system and is commonly referenced for carbon steel and steel pipe dimensions under ASME B36.10. In practical piping work, Schedule STD is used as a standard wall thickness designation for many nominal pipe sizes. It helps engineers, fabricators, and buyers confirm dimensional compatibility, estimate weight, and coordinate with fittings, flanges, supports, and structural loads.
Common Uses of 1 1/2 Inch Schedule STD Pipe
1 1/2 inch Schedule STD pipe is commonly used in industrial and utility piping systems where good flow capacity and standard steel pipe dimensions are required. This size is often selected for water, cooling, transmission, and plant services where reliable dimensional data is important for design, fabrication, and construction.
- Water transmission lines for plant and utility service
- Cooling water systems in industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in process plants
- Pump suction and discharge lines where standard pipe dimensions are needed
- Municipal and public works projects requiring steel pipe sizes
- Replacement and upgrade projects where standard pipe dimensions are required
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, handling requirements, and installation planning. Final pipe selection should always be verified against project pressure, temperature, fluid type, corrosion allowance, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for support design, material take-off, transport planning, lifting studies, welding preparation, and installation work. For a pipe size such as 1 1/2 inch DN40, accurate weight data is useful for support design, material planning, and installation review. Inside diameter is also important for flow calculations and hydraulic 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, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 1 1/2 Inch (DN40) is listed on the current page with 48.3 mm OD, 40.94 mm ID, 3.68 mm wall thickness, and 4.05 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for piping systems and project coordination.
How to Read This Pipe Reference
The NPS and DN labels identify the nominal pipe size used in industry documentation. They are naming conventions rather than direct measurements of the pipe bore. The listed outside diameter is especially important when checking fit-up, clamps, supports, sleeves, fittings, and flange connections.
The inside diameter and wall thickness serve different purposes. Inside diameter is the dimensional input commonly reviewed for flow and hydraulic calculations, while wall thickness is checked during fabrication, corrosion allowance review, welding preparation, and dimensional coordination. The published weight supports material takeoffs, handling plans, support-load reviews, and transport estimates.
Schedule STD Is a Dimensional Designation
Schedule STD identifies a standard-weight pipe wall designation within the applicable pipe-dimension reference. It should not be treated as a complete material specification, pressure rating, or design qualification. Final selection also depends on the project specification, material requirements, service conditions, joining method, corrosion considerations, and applicable engineering checks.
Practical Coordination Checklist
- Confirm that the drawing, specification, and purchase description use the same NPS, DN, and schedule terminology.
- Use the outside diameter when coordinating supports, clamps, sleeves, fittings, and connection details.
- Use the inside diameter for the appropriate flow or hydraulic review rather than relying on the nominal size alone.
- Include the published pipe weight in material takeoffs and review additional contents or attached-component loads separately.
- Check the downloadable DWG reference when preparing drafting or layout work, then verify project-specific dimensions before fabrication.
Related PipeSTD Reference Topics
This page can be part of a broader piping reference workflow. Useful companion topics include pipe dimensions by schedule, ASME B36.10 pipe references, pipe fittings and elbows, flange sizing, pipe support design considerations, and DWG/CAD piping resources. Linking these topics helps readers move from dimensional identification to connection, drafting, and installation coordination without confusing nominal size with actual geometry.
Frequently Asked Questions
What does Schedule STD mean for this pipe?
Schedule STD means Standard Weight in the inch-based IPS pipe system. It identifies a standard wall-thickness designation used for dimensional coordination; it does not by itself define the material grade, pressure rating, or complete design suitability.
What are the NPS and DN designations?
The page identifies the pipe as NPS 1 1/2 and DN40. NPS is the nominal pipe size designation in inch-based terminology, while DN is the corresponding metric nominal designation.
Which dimension should be used for a flow review?
Use the listed inside diameter as the dimensional reference for an appropriate flow or hydraulic calculation. The nominal NPS or DN label should not be substituted for the actual listed bore dimension.
Which dimension matters for supports and fittings?
The outside diameter is generally the key dimensional reference for checking external fit, supports, clamps, sleeves, and compatibility with connected components. Always confirm the component and project requirements before fabrication or installation.
Is the listed pipe weight enough for a support calculation?
The listed unit weight is useful for preliminary material takeoffs and load review, but a complete support calculation may also need contents, insulation, coatings, fittings, valves, operating conditions, and other attached loads.
Is a CAD file available for this pipe reference?
The page includes a downloadable DWG reference for Schedule STD Pipe 1 1/2 Inch (DN40). Use the file as a drafting aid and verify dimensions against the authoritative page data and project requirements before issuing fabrication documents.