Schedule 40 pipe 34 inch (DN850) is a standard large-diameter steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions and weight data for NPS 34 Schedule 40 pipe based on ANSI / ASME B36.10, including outside diameter, inside diameter, wall thickness, and weight per meter.
This size is often referenced in industrial piping systems, utility lines, water transmission projects, and heavy-duty fabrication work where accurate dimensional data is required for layout, support design, material takeoff, and installation planning.
34 Inch Schedule 40 Pipe Dimensions
- Nominal Pipe Size (NPS): 34 inch
- Diameter Nominal (DN): DN850
- Pipe Schedule: Schedule 40
- Outside Diameter (OD): 864 mm
- Wall Thickness: 17.48 mm
- Inside Diameter (ID): 829.04 mm
- Pipe Weight: 364.92 kg/m
- Pipe Weight Including Water: 904.45 kg/m
- Reference Standard: ANSI / ASME B36.10
Schedule 40 Pipe 34 Inch (DN850) Data Table
| NPS | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 34 inch | DN850 | 864 | 17.48 | 829.04 | 364.92 |
What Is 34 Inch Schedule 40 Pipe Used For?
34 inch Schedule 40 pipe is generally used in large-scale piping systems where a strong and standardized steel pipe is needed. Engineers and fabricators may use this size in:
- Water transmission systems
- Industrial utility piping
- Cooling water lines
- Process piping systems
- Plant layout and pipe rack coordination
- Fabrication and spool drawing preparation
Because it is a large nominal pipe size, the correct dimensions and weight are important for support selection, lifting plans, transportation studies, and accurate engineering calculations.
Why These Dimensions Matter in Engineering
In piping and mechanical design, standard pipe data is used for more than identification. The outside diameter is important for clamps, supports, insulation sizing, and equipment connection layouts. The inside diameter affects flow area and hydraulic calculations. The wall thickness influences pipe strength, fabrication details, and welding preparation, while the pipe weight per meter is essential for load calculations, structural support design, and installation planning.
Using the correct DN850 Schedule 40 pipe dimensions helps reduce drawing errors, material ordering mistakes, and field fit-up issues during construction.
34 Inch DN850 Schedule 40 Pipe for CAD and Drafting Work
For CAD, BIM, and piping drafting work, this size is commonly listed as NPS 34 or DN850. The standard OD of 864 mm is especially useful for routing clearance, support detailing, and nozzle or equipment connection references in 2D and 3D models.
This page can be used as a quick reference for 34 inch Schedule 40 pipe dimensions, DN850 pipe dimensions, and Schedule 40 steel pipe weight per meter during design and estimation work.
Frequently Asked Questions
What is the outside diameter of 34 inch Schedule 40 pipe?
The outside diameter of 34 inch Schedule 40 pipe is 864 mm.
What is the wall thickness of DN850 Schedule 40 pipe?
The wall thickness is 17.48 mm.
What is the inside diameter of Schedule 40 pipe 34 inch?
The inside diameter is 829.04 mm.
How much does 34 inch Schedule 40 pipe weigh?
The pipe weight is 364.92 kg/m. The weight including water is 904.45 kg/m.
Which standard covers these dimensions?
These dimensions are based on ANSI / ASME B36.10.
Conclusion
Schedule 40 pipe 34 inch (DN850) is an important reference size for industrial piping, drafting, fabrication, and engineering calculation work. With an OD of 864 mm, ID of 829.04 mm, wall thickness of 17.48 mm, and weight of 364.92 kg/m, it is a useful standard pipe size for engineers, designers, and project estimators working with large-diameter steel piping systems.
For more pipe schedule data, compare this size with nearby standard sizes such as 32 inch and 36 inch Schedule 40 pipe pages.