This reference page covers 34 inch Schedule 10 pipe, also identified as NPS 34 and DN850. Use the dimensional data below when checking piping layouts, fabrication drawings, material takeoffs, and preliminary weight estimates. The existing table is the controlling local reference for the listed outside diameter, wall thickness, inside diameter, and mass values.
For related drafting work, compare this page with the site’s references for pipe schedules, large-diameter pipe, pipe fittings, flanges, and DWG pipe resources. Those subjects help connect a straight-pipe dimension check with the components and drawings used in a complete piping system.
Schedule 10 pipe 34 inch (DN850) is a large-diameter steel pipe size used in piping layout, fabrication, and engineering reference work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 34 Schedule 10 pipe based on ASME B36.10.
34 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 34 inch
- Diameter Nominal (DN): DN850
- Outside Diameter (OD): 864 mm
- Wall Thickness: 7.92 mm
- Inside Diameter (ID): 848.16 mm
- Pipe Weight: 167.21 kg/m
- Pipe Weight Filled With Water: 731.91 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 34 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 34 inch | 850 | 864 | 7.92 | 848.16 | 167.21 |
What Does Schedule 10 Mean?
Schedule 10 indicates the wall thickness series of the pipe. For the same nominal pipe size, the outside diameter remains fixed, while the wall thickness changes depending on the pipe schedule. A thicker wall generally increases pipe weight and reduces the inside diameter.
Typical Uses of 34 Inch Schedule 10 Pipe
NPS 34 Schedule 10 pipe is commonly used where large flow capacity is required with relatively lighter wall thickness than heavier schedules. It may be used in water transfer systems, low-pressure process lines, utility piping, drainage-related applications, plant layout work, and general piping design references.
Why Pipe Weight Is Important
Pipe weight per meter is useful for transport planning, support design, structural loading, fabrication estimates, and lifting calculations. In large-diameter piping systems, total line weight can significantly affect installation methods and support spacing.
34 Inch Schedule 10 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimension data 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 34 inch Schedule 10 pipe?
The outside diameter is 864 mm.
What is the wall thickness of DN850 Schedule 10 pipe?
The wall thickness is 7.92 mm.
What is the inside diameter of NPS 34 Schedule 10 pipe?
The inside diameter is 848.16 mm.
How much does 34 inch Schedule 10 pipe weigh?
The approximate weight is 167.21 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for welded and seamless wrought steel pipe.
Conclusion
Schedule 10 pipe 34 inch (DN850) has an outside diameter of 864 mm, wall thickness of 7.92 mm, inside diameter of 848.16 mm, and a weight of 167.21 kg/m. It is a useful reference size for piping design, drafting, estimating, and fabrication work.
How to Read This 34 Inch Schedule 10 Pipe Reference
The nominal size identifies the pipe designation used for engineering and procurement, while the outside diameter is the physical envelope commonly coordinated in layouts and connection details. The wall thickness is the schedule-specific dimension, and the inside diameter is the resulting internal opening shown in the source data.
When reviewing a drawing or material list, keep the nominal designation, DN designation, outside diameter, and schedule together. Confusing nominal size with the measured outside diameter can lead to errors when coordinating supports, fittings, flanges, clearances, or CAD blocks. A related pipe dimension chart can help with cross-checking adjacent sizes, while a pipe schedule guide explains how wall series are organized.
Using the Weight Data in Project Work
The listed mass per meter is useful for estimating line loads, handling requirements, transport planning, and fabrication quantities. If the line contains water, the source also provides a filled-pipe weight for reference. Actual installed loads may require additional consideration of fittings, valves, flanges, insulation, supports, contents, and project-specific material information.
Use the dimensional values for reference and coordination rather than as a substitute for a pressure-rating review or a project-specific structural calculation. Confirm the applicable material specification, manufacturing tolerances, connection details, and design requirements before fabrication or procurement.
Related Pipe Reference Topics
- Pipe schedules: compare wall-thickness designations without treating schedule as a complete pressure design specification.
- Pipe fittings and flanges: coordinate connection geometry with the selected nominal size and outside diameter.
- Pipe weight calculations: review how dry and filled conditions affect preliminary support and handling checks.
- DWG resources: use the downloadable drawing alongside project drafting standards and verified connection details.
Additional Questions About 34 Inch Schedule 10 Pipe
Is Schedule 10 the same as the pipe’s material grade?
No. Schedule 10 describes the wall-thickness series. Material grade, manufacturing requirements, and service conditions are separate parts of a pipe specification and should be verified from the project documents.
Can the listed weight be used as the complete installed line load?
No. The listed pipe weight is a reference for the pipe itself, with a separate filled-with-water value provided in the source. Installed loading may also include fittings, valves, flanges, contents, insulation, supports, and other attached items.
Why should the outside diameter be checked when selecting fittings?
The outside diameter is important for layout coordination and connection compatibility. Confirm the applicable fitting, flange, and joining standard before selecting components for fabrication.
Is the downloadable DWG sufficient for fabrication?
Use the DWG as a drafting reference and verify its details against the project specification, approved drawings, connection requirements, and applicable standards before fabrication.