Use this page as a quick reference when checking 1 1/2 inch Schedule 5 pipe dimensions for drafting, fabrication, estimating, or piping coordination. The source table provides the dimensional and weight data for the DN40 designation, while the explanations below clarify how to apply those values during project review.
For procurement or design, compare the pipe dimensions with the applicable material specification, project piping class, joining method, and service requirements. A nominal size identifies the pipe designation; it should not be treated as a direct measurement of the outside or inside diameter.
Schedule 5 Pipe 1 1/2 Inch (DN40) is a steel pipe size commonly used in industrial piping systems that require good flow capacity with a relatively light wall thickness. This pipe size is often used in utility piping, water systems, low-pressure industrial service, and general steel pipe fabrication work.
This dimension data is based on ANSI/ASME B36.10, which is the standard commonly used for carbon steel pipe dimensions.
1 1/2 Inch Schedule 5 Pipe Dimensions
- Pipe Schedule: 5
- Nominal Pipe Size: 1 1/2 Inch
- DN Size: DN40
- Outside Diameter (OD): 48.3 mm
- Inside Diameter (ID): 45 mm
- Wall Thickness: 1.65 mm
- Pipe Weight: 1.9 kg/m
- Pipe Weight Including Water: 3.48 kg/m
- Standard: ANSI/ASME B36.10
Schedule 5 Pipe 1 1/2 Inch Dimension Table
| Pipe Schedule | NPS (Inch) | DN (mm) | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 5 | 1 1/2 | 40 | 48.3 | 45 | 1.65 | 1.9 |
What Is 1 1/2 Inch Schedule 5 Pipe?
A 1 1/2 inch Schedule 5 pipe is a steel pipe with a nominal size of 1 1/2 inches and a relatively thin wall thickness compared with heavier schedules. For this size, the outside diameter is fixed at 48.3 mm, while the inside diameter is 45 mm based on a wall thickness of 1.65 mm.
Schedule 5 pipe is often selected when a project needs good flow capacity, reduced pipe weight, and easier handling compared with thicker wall pipes. It is commonly referenced in steel piping design, drafting, fabrication, and material takeoff work.
Where Is Schedule 5 Pipe 1 1/2 Inch Used?
This pipe size is commonly used in applications that need good flow capacity with relatively light wall thickness. Typical uses include:
- Water transfer and distribution systems
- Utility and low-pressure industrial piping
- Process and service lines
- Pipe spool fabrication and layout work
- General steel piping projects
Why Pipe Dimensions Matter
Accurate 1 1/2 inch Schedule 5 pipe dimensions are important for piping layout, fabrication, transport planning, support design, and installation work. Engineers and designers often check OD, ID, wall thickness, and weight before selecting supports, fittings, welding details, and handling methods.
The outside diameter is important for matching supports, clamps, and pipe accessories. The inside diameter helps estimate internal flow area and system capacity. The wall thickness affects mechanical strength and specification compliance, while the pipe weight per meter is useful for lifting plans, transport, and structural loading calculations.
1 1/2 Inch Schedule 5 Pipe Weight Information
The nominal weight of this pipe size is 1.9 kg/m. When filled with water, the combined weight becomes approximately 3.48 kg/m. This information is useful for pipe support design, structural coordination, and lifting preparation in piping systems.
Difference Between NPS 1 1/2 and DN40
NPS 1 1/2 is the inch-based nominal pipe size, while DN40 is the metric designation used in international drawings and specifications. Both terms refer to the same nominal pipe size, and users may search by either inch size or DN format depending on project standards.
Common Search Terms for This Pipe Size
Users may also search for this pipe using related keywords such as 1 1/2 inch Schedule 5 pipe dimensions, DN40 Schedule 5 pipe dimensions, 1 1/2 inch pipe weight per meter, DN40 pipe dimensions, or DN40 sch 5 pipe dimensions.
Conclusion
Schedule 5 Pipe 1 1/2 Inch (DN40) has an outside diameter of 48.3 mm, an inside diameter of 45 mm, a wall thickness of 1.65 mm, and a weight of 1.9 kg/m. It is a useful steel pipe reference size for design, drafting, fabrication, and procurement work.
This page provides a quick reference for engineers, drafters, fabricators, and buyers who need reliable 1 1/2 inch Schedule 5 pipe dimensions and DN40 pipe dimensions in one place.
How to Use This Pipe Reference
Start with the outside diameter when coordinating clamps, supports, sleeves, clearances, and connected components. Use the inside diameter for preliminary flow-area checks, while recognizing that actual system performance also depends on fittings, valves, surface condition, fluid properties, and operating conditions.
The listed wall thickness and mass are useful for fabrication review, material takeoffs, handling plans, and support coordination. They do not, by themselves, establish allowable pressure, temperature limits, corrosion allowance, weld requirements, or structural adequacy. Those checks require the governing design code and project specifications.
Drafting and CAD Coordination
When preparing a piping drawing, keep the nominal designation, DN designation, schedule, material specification, and end-connection information consistent across the model, bill of materials, and fabrication documents. The downloadable DWG can support layout and detailing work, but dimensions should be checked against the project specification before issuing drawings for fabrication.
Useful related references include pipe schedules, nominal pipe size and DN conversion, pipe fittings, flange dimensions, and pipe support design. These topics help connect dimensional reference data with the components and coordination decisions used in a complete piping system.
Checks Before Selecting the Pipe
- Confirm that the required pipe material and manufacturing specification match the project documents.
- Verify compatibility with the selected fittings, flanges, valves, couplings, and welding details.
- Review service pressure, temperature, corrosion, erosion, and external loading requirements with the responsible engineer.
- Use the listed mass for preliminary coordination, then account for contents, insulation, coatings, supports, and attached components where applicable.
- Confirm that the CAD geometry and drawing notes agree with the approved piping class and procurement description.
Frequently Asked Questions
What is the outside diameter of 1 1/2 inch Schedule 5 pipe?
The source data lists an outside diameter of 48.3 mm.
Is NPS 1 1/2 the same nominal size as DN40?
Yes. NPS 1 1/2 and DN40 are two designation systems for the same nominal pipe size. The actual dimensions should be taken from the applicable schedule and reference data.
Does Schedule 5 define the pipe pressure rating?
No. A schedule identifies a dimensional wall category; pressure capability also depends on material, temperature, design code, manufacturing requirements, corrosion allowance, and other project conditions.
Where can the DWG file be used?
The downloadable DWG is intended as a drafting and layout reference for this pipe size. Review it against the approved project documents before using it for fabrication or construction.
What information should be checked with the pipe dimensions?
Check the material specification, end connections, applicable piping class, service conditions, tolerances, and compatibility with connected components. The dimensional table is a reference and does not replace project engineering verification.