Use this page as a quick reference when checking 36 inch Schedule 40 pipe dimensions for piping layouts, fabrication drawings, estimates, and equipment coordination. The table below preserves the authoritative local data for NPS 36, also identified as DN900.
For related terminology, compare this reference with the site’s pipe dimensions guide, pipe schedule references, and NPS and DN explanation. These resources help distinguish nominal designations from the measured dimensions used in drawings and field work.
Schedule 40 pipe 36 inch (DN900) is a standard large-diameter steel pipe size widely used in piping design, fabrication, estimation, and plant engineering. This page provides the standard dimensions and weight data for NPS 36 Schedule 40 pipe according to ASME B36.10, including outside diameter, inside diameter, wall thickness, and weight per meter.
This pipe size is commonly referenced in industrial projects involving water systems, process piping, utility lines, fire protection networks, and heavy-duty fabrication work where accurate dimensional data is important for layout, support design, transport planning, and material takeoff.
36 Inch Schedule 40 Pipe Dimensions
- Nominal Pipe Size (NPS): 36 inch
- Diameter Nominal (DN): DN900
- Pipe Schedule: Schedule 40
- Outside Diameter (OD): 914 mm
- Wall Thickness: 19.05 mm
- Inside Diameter (ID): 875.9 mm
- Pipe Weight: 420.45 kg/m
- Pipe Weight Including Water: 1022.7 kg/m
- Reference Standard: ASME B36.10
Schedule 40 Pipe 36 Inch (DN900) Data Table
| NPS | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 36 inch | DN900 | 914 | 19.05 | 875.9 | 420.45 |
What Is 36 Inch Schedule 40 Pipe Used For?
36 inch Schedule 40 pipe is typically used in large-scale industrial and infrastructure projects where a strong and standardized steel pipe section is required. Engineers, fabricators, and draftsmen often use this size in:
- Process piping systems
- Water transmission lines
- Cooling water and utility piping
- Fire water networks
- Large plant piping layouts
- Mechanical and structural support coordination
Because this is a large nominal size, accurate weight and dimension data are important when preparing support spacing, transportation studies, lifting plans, spool fabrication drawings, and material cost estimates.
Why These Dimensions Matter in Engineering
For piping and mechanical work, pipe dimensions affect more than just fit-up. The outside diameter is important for clamp selection, support details, flange matching, insulation sizing, and CAD drafting. The inside diameter affects flow capacity and hydraulic calculations. The wall thickness influences pipe strength, fabrication, and welding preparation, while the weight per meter is essential for load calculations, steel support design, and lifting arrangements.
Using the correct DN900 Schedule 40 pipe dimensions also helps avoid drawing errors, procurement mistakes, and field installation issues. For this reason, many engineers and designers keep standard pipe dimension references available during model review and piping layout work.
36 Inch DN900 Schedule 40 Pipe for CAD and Drafting Work
If you are preparing piping drawings, 3D models, spool sheets, or support details, this size is commonly entered as NPS 36 or DN900. In CAD and drafting work, the standard OD of 914 mm is especially important because it is typically used for routing clearance, support geometry, and nozzle or equipment connection layouts.
When building pipe libraries or engineering references, this page can be used as a quick lookup for 36 inch Schedule 40 pipe dimensions, DN900 pipe dimensions, and Schedule 40 steel pipe weight per meter.
Frequently Asked Questions
What is the outside diameter of 36 inch Schedule 40 pipe?
The outside diameter of 36 inch Schedule 40 pipe is 914 mm.
What is the wall thickness of DN900 Schedule 40 pipe?
The wall thickness is 19.05 mm.
What is the inside diameter of Schedule 40 pipe 36 inch?
The inside diameter is 875.9 mm.
How much does 36 inch Schedule 40 pipe weigh?
The pipe weight is 420.45 kilograms per meter. The weight including water is 1022.7 kilograms per meter.
Which standard covers these dimensions?
These dimensions are based on ASME B36.10 for standard steel pipe dimensions.
Conclusion
Schedule 40 pipe 36 inch (DN900) is a commonly referenced large-diameter pipe size in industrial piping systems. With an OD of 914 mm, ID of 875.9 mm, wall thickness of 19.05 mm, and weight of 420.45 kg/m, it is an important reference size for engineering design, drafting, fabrication, and project estimation.
For more standard steel pipe sizes, browse other pipe schedule pages to compare dimensions, wall thickness, and weight across different NPS, DN, and schedule classes.
How to Read the DN900 Schedule 40 Data
NPS 36 and DN900 are designation systems for the same nominal pipe size. They are useful for searching specifications, selecting compatible components, and maintaining consistent labels across drawings and procurement documents. The nominal designation should not be treated as the measured outside or inside diameter; use the listed dimensional fields when creating geometry or checking clearances.
Which value should be used for drafting?
Use the outside diameter when modeling the pipe envelope, checking routing clearances, coordinating supports, or developing clamp and insulation details. Use the inside diameter when the open flow passage is relevant to hydraulic work or internal clearances. Wall thickness is useful for section definition, fabrication review, and welding preparation.
How should the weight data be applied?
The listed pipe weight per meter supports material takeoffs, transport planning, lifting studies, and preliminary support-load coordination. The separate water-filled value represents a different loading condition and should not be substituted for the dry pipe value. Final support, lifting, and structural checks should account for the complete system, including valves, fittings, insulation, contents, temporary loads, and applicable project requirements.
Important design check
A schedule designation and dimensional reference do not by themselves establish allowable pressure, corrosion allowance, material grade, joining requirements, or project suitability. Confirm those requirements against the governing project specification and the applicable engineering review. For component coordination, also review the site’s pipe fittings reference, flange dimensions guide, and pipe support resources.
CAD and Procurement Checklist
- Label the model or drawing consistently as NPS 36, DN900, and Schedule 40 where required.
- Use the authoritative OD, ID, wall thickness, and weight fields from the table rather than estimating geometry from the nominal name.
- Check that connected fittings, flanges, valves, and equipment nozzles use compatible project data.
- Keep the dry-pipe and water-filled loading cases distinct in estimates and support coordination.
- Verify the downloaded DWG against the project drawing standard, units, layer conventions, and connection details before issuing it for construction.
Additional Questions About 36 Inch Schedule 40 Pipe
Are NPS 36 and DN900 interchangeable labels?
They identify the same nominal pipe size in different designation systems. In project documents, use the designation required by the applicable specification and keep the dimensional data aligned with the referenced standard.
Does Schedule 40 alone define the pipe’s pressure rating?
No. Schedule identifies a standardized dimensional class, but pressure design also depends on factors such as material, temperature, corrosion allowance, joining method, code requirements, and project specifications. A qualified engineer should confirm the design basis.
Why are both pipe weight and pipe weight including water listed?
They represent different planning conditions. The pipe-only value is useful for material and handling estimates, while the water-filled value represents the pipe with its stated internal contents. Other operating or temporary loads may still need to be added.
Can the DWG be used directly in a project model?
Use the DWG as a reference starting point, then check units, scale, layers, coordinate conventions, and connection geometry against the project’s CAD standards and the relevant component drawings.