This reference page is for engineers, designers, drafters, fabricators, estimators, and procurement teams checking large-diameter steel pipe data. Use the dimensional list and table together: the list provides a quick specification summary, while the table is convenient for comparing pipe sizes and transferring values into design notes or estimating worksheets.
When using this information in a project, distinguish nominal pipe size from measured diameter. NPS and DN identify the pipe size designation, while outside diameter, wall thickness, and inside diameter describe the physical section. For connected components, verify compatibility with the applicable pipe fittings, flanges, and project specifications.
Schedule 20 pipe 36 inch (DN900) is a large-diameter steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 36 Schedule 20 pipe based on ASME B36.10.
36 Inch Schedule 20 Pipe Dimensions
- Nominal Pipe Size (NPS): 36 inch
- Diameter Nominal (DN): DN900
- Outside Diameter (OD): 914 mm
- Wall Thickness: 12.7 mm
- Inside Diameter (ID): 888.6 mm
- Pipe Weight: 282.29 kg/m
- Pipe Weight Filled With Water: 902.13 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 20 Pipe 36 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 36 inch | 900 | 914 | 12.7 | 888.6 | 282.29 |
What Does Schedule 20 Mean?
Schedule 20 refers to a lighter wall thickness series than heavier schedules such as Schedule 40, Schedule 80, or Schedule 160. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes according to the schedule. A lighter wall gives a larger inside diameter and lower pipe weight.
Typical Uses of 36 Inch Schedule 20 Pipe
NPS 36 Schedule 20 pipe is commonly referenced in large-diameter industrial piping systems, utility lines, water-related systems, plant layout drawings, and fabrication work where a large flow area is needed with lower wall thickness than heavier pipe schedules.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 36 inch pipe, total line weight can become very high even with a lighter schedule, so accurate data is essential for engineering work.
36 Inch Schedule 20 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material specification, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 36 inch Schedule 20 pipe?
The outside diameter is 914 mm.
What is the wall thickness of DN900 Schedule 20 pipe?
The wall thickness is 12.7 mm.
What is the inside diameter of NPS 36 Schedule 20 pipe?
The inside diameter is 888.6 mm.
How much does 36 inch Schedule 20 pipe weigh?
The approximate weight is 282.29 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 20 pipe 36 inch (DN900) has an outside diameter of 914 mm, wall thickness of 12.7 mm, inside diameter of 888.6 mm, and a weight of 282.29 kg/m. It is a useful reference for piping design, fabrication, estimating, and industrial engineering work.
How to Use This Pipe Reference
The dimensional data can support preliminary layout, material takeoff, fabrication planning, and CAD preparation. For layout work, the outside diameter is typically the key envelope dimension. For flow-area checks, the inside diameter is the relevant dimensional reference. For handling and support studies, use the listed pipe weight together with the project requirements for coatings, lining, insulation, contents, fittings, and other attached items.
The water-filled value should be treated as a reference condition stated by this page, not as a complete operating load case. Actual line loads can also include fluid properties, valves, flanges, supports, thermal effects, and local design requirements. Confirm the governing design basis before using the data for support, lifting, or structural decisions.
Related Pipe Design References
For broader comparison, see the site’s reference pages for pipe schedules, pipe dimensions, and pipe weight calculations. Connections and drafting details may also require related references for butt-weld fittings, flange dimensions, and pipe CAD and DWG resources.
Drafting and Estimating Checks
- Confirm that the drawing uses the intended NPS and DN designation.
- Use the outside diameter when checking physical clearance and routing space.
- Use the inside diameter when documenting the nominal flow passage.
- Record the wall thickness and pipe weight separately in material takeoffs.
- Check supplier documentation and the project specification before procurement or fabrication.
Additional Questions About This Reference
Can the listed dimensions be used directly for a CAD model?
They can provide the dimensional basis for a preliminary model or drafting reference. Before issuing fabrication drawings, confirm the project specification, manufacturing tolerances, end preparation, corrosion allowance, and connection details.
Does pipe schedule identify the material grade?
No. A schedule identifies a dimensional wall-thickness series. Material grade, manufacturing requirements, testing, and service suitability must be established separately by the applicable specification and project documentation.
Should the pipe weight be used as the complete installed line load?
No. The listed pipe weight is a pipe reference value. An installed line-load assessment may also need the contents, fittings, flanges, valves, insulation, lining, supports, and other project-specific items.
Why should connected components be checked separately?
Pipe dimensions do not by themselves define the dimensions or rating of fittings, flanges, valves, or other components. Check each connected item against the governing component standard and the project design requirements.