Use this reference to check Schedule 30 pipe 1 1/2 inch (DN40) dimensions for piping layouts, CAD drawings, material takeoffs, and preliminary support-load reviews. The page brings the key outside diameter, inside diameter, wall thickness, and weight data together in one quick-reference location.
When using the values in a project, distinguish between nominal size and measured geometry. NPS 1 1/2 and DN40 identify the same nominal pipe-size category here, while the listed outside and inside diameters support different drafting, clearance, and flow-reference tasks.
Schedule 30 pipe 1 1/2 inch (DN40) is a standard steel pipe size commonly used in piping design, drafting, fabrication, estimation, and industrial layout work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 1 1/2 Schedule 30 pipe based on ASME B36.10.
For engineers, designers, estimators, and CAD users, quick access to accurate pipe data helps improve piping layout, support planning, weight checks, transport review, and fabrication coordination during project development.
1 1/2 Inch Schedule 30 Pipe Dimensions
- Nominal Pipe Size (NPS): 1 1/2 inch
- Diameter Nominal (DN): DN40
- Outside Diameter (OD): 48.3 mm
- Wall Thickness: 3.18 mm
- Inside Diameter (ID): 41.94 mm
- Pipe Weight: 3.53 kg/m
- Pipe Weight Including Water: 4.91 kg/m
- Standard: ASME B36.10
Schedule 30 Pipe 1 1/2 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 1 1/2 inch | DN40 | 48.3 mm | 3.18 mm | 41.94 mm | 3.53 kg/m |
Understanding 1 1/2 Inch Schedule 30 Pipe
1 1/2 inch Schedule 30 pipe is a standard steel pipe size used as a reference in industrial piping layouts, utility systems, water lines, process design studies, and CAD drafting. With an outside diameter of 48.3 mm and a wall thickness of 3.18 mm, this pipe size is suitable for light to medium piping applications where designers need a balance between flow capacity and pipe wall strength.
What Does Schedule 30 Mean?
Schedule 30 refers to the wall thickness series of the pipe. For NPS 1 1/2, Schedule 30 gives a wall thickness of 3.18 mm. The schedule affects the inside diameter, total pipe weight, fabrication planning, and compatibility with supports, fittings, and structural loading requirements.
Why These Pipe Dimensions Matter
Accurate pipe dimension data is important for piping layouts, spool drawings, support design, structural load review, and material takeoff. Knowing that this pipe weighs 3.53 kg/m helps with transport estimates, lifting plans, and support loading. If the pipe is filled with water, the total weight increases to 4.91 kg/m, which is useful for operating load calculations and support checks.
Common Uses of DN40 Schedule 30 Pipe
DN40 Schedule 30 pipe may be referenced in industrial utility systems, water transfer lines, plant layout studies, process piping documentation, and engineering design work. It is also useful for piping designers, CAD users, estimators, and procurement teams who need standard steel pipe dimensions for piping systems.
Difference Between NPS 1 1/2 and DN40
NPS 1 1/2 is the inch-based nominal pipe size designation, while DN40 is the metric nominal diameter reference. Both refer to the same pipe size category on this page. The actual standard outside diameter for this size is 48.3 mm.
How to Use This Data
You can use this page to quickly check:
- pipe outside diameter for layout and clearance
- inside diameter for flow reference
- wall thickness for schedule comparison
- weight per meter for estimation and transport planning
- water-filled weight for support and structural load review
Quick Reference for Schedule 30 Pipe 1 1/2 Inch
- Pipe Size: 1 1/2 inch
- DN: DN40
- OD: 48.3 mm
- ID: 41.94 mm
- Wall Thickness: 3.18 mm
- Weight: 3.53 kg/m
- Weight Including Water: 4.91 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 30 Pipe 1 1/2 Inch (DN40) is an important steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 48.3 mm outside diameter, 3.18 mm wall thickness, and 3.53 kg/m pipe weight, it provides useful dimensional data for engineers and designers who need fast and accurate pipe information.
Note: NPS = Nominal Pipe Size, DN = Diameter Nominal. Dimensions and weights shown here are based on ASME B36.10 steel pipe data.
How to Read the Schedule 30 Pipe Data
The outside diameter is the primary envelope dimension for layout, sleeve coordination, clamps, insulation clearance, and interference checks. The inside diameter is the clear internal passage shown in the reference data and can be used for preliminary flow-area comparisons.
Wall thickness connects the outside and inside dimensions and identifies the Schedule 30 wall series for this nominal size. It should not be treated as a complete design qualification by itself. Material specification, joining method, corrosion allowance, service conditions, code requirements, and project design criteria must be reviewed separately.
Using the Weight Values in Design Reviews
The listed pipe weight provides a useful basis for material estimates, handling studies, transportation planning, and preliminary support-load checks. The water-filled value is a separate operating-condition reference and should be considered when reviewing loads on supports, anchors, guides, and connected equipment.
For a final engineering review, confirm the assumed contents and project conditions. Field-installed systems may also include fittings, flanges, valves, insulation, coatings, clamps, and other attachments that are not represented by the bare-pipe value in the table.
Drafting and Procurement Checks
- Use the outside diameter when checking physical clearances and connection geometry.
- Use the inside diameter as a reference for internal passage and preliminary flow discussions.
- Use the wall thickness when comparing this schedule with other pipe options.
- Use the stated mass-per-length values consistently in estimates and load calculations.
- Confirm the governing material and piping specifications before purchasing or fabricating.
For adjacent size references, compare this page with Schedule 30 Pipe 1 1/4 Inch (DN32) and Schedule 30 Pipe 2 Inch (DN50). The downloadable DWG can also support drafting workflows, but drawing dimensions should be checked against the project specification before release.
Frequently Asked Questions
What is the nominal size of Schedule 30 pipe 1 1/2 inch?
The nominal designations shown on this page are NPS 1 1/2 and DN40. These are nominal size references, not a statement that every related dimension equals the nominal designation.
What dimensions are provided for this pipe?
The reference includes the outside diameter, wall thickness, inside diameter, pipe weight, and weight including water. The source table identifies the outside diameter as 48.3 mm, the wall thickness as 3.18 mm, and the inside diameter as 41.94 mm.
What does Schedule 30 identify?
For this page, Schedule 30 identifies the pipe wall-thickness series associated with NPS 1 1/2. Schedule designation alone does not establish all allowable operating conditions or replace a project-specific piping design review.
How can the pipe weight be used?
The listed 3.53 kg/m value can support preliminary quantity, transport, handling, and support-load estimates. The listed 4.91 kg/m value includes water and is useful for reviewing a filled operating condition.
Which standard is referenced?
The source content identifies ASME B36.10 as the reference for the steel pipe dimensions and weights shown on this page. Always verify the complete applicable specification and project requirements before fabrication or procurement.