Use this reference when you need to identify, compare, or place Schedule 30 Pipe 34 Inch (DN850) in a piping layout or engineering document. The page separates nominal designations from the actual outside and inside dimensions, making the data useful for drafting, estimating, fabrication coordination, and preliminary load review.
For CAD work, the accompanying DWG resource can support layout development. Always compare the dimensional reference with the project specification, material requirements, connection details, and governing design criteria before using it for procurement or final engineering.
Schedule 30 pipe 34 inch (DN850) is a large-diameter 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 34 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.
34 Inch Schedule 30 Pipe Dimensions
- Nominal Pipe Size (NPS): 34 inch
- Diameter Nominal (DN): DN850
- Outside Diameter (OD): 864 mm
- Wall Thickness: 15.88 mm
- Inside Diameter (ID): 832.24 mm
- Pipe Weight: 332.14 kg/m
- Pipe Weight Including Water: 875.84 kg/m
- Standard: ASME B36.10
Schedule 30 Pipe 34 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 34 inch | DN850 | 864 mm | 15.88 mm | 832.24 mm | 332.14 kg/m |
Understanding 34 Inch Schedule 30 Pipe
34 inch Schedule 30 pipe is a large steel pipe size used as a reference in industrial piping layouts, utility systems, water transmission lines, process design studies, and CAD drafting. With an outside diameter of 864 mm and a wall thickness of 15.88 mm, this pipe size is suitable for large-flow 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 34, Schedule 30 gives a wall thickness of 15.88 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 332.14 kg/m helps with transport estimates, lifting plans, and support loading. If the pipe is filled with water, the total weight increases to 875.84 kg/m, which is useful for operating load calculations and support checks.
Common Uses of DN850 Schedule 30 Pipe
DN850 Schedule 30 pipe may be referenced in industrial utility systems, large 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 large-diameter piping systems.
Difference Between NPS 34 and DN850
NPS 34 is the inch-based nominal pipe size designation, while DN850 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 864 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 34 Inch
- Pipe Size: 34 inch
- DN: DN850
- OD: 864 mm
- ID: 832.24 mm
- Wall Thickness: 15.88 mm
- Weight: 332.14 kg/m
- Weight Including Water: 875.84 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 30 Pipe 34 Inch (DN850) is an important large-diameter steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 864 mm outside diameter, 15.88 mm wall thickness, and 332.14 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 34-Inch Pipe Data
NPS 34 and DN850 are nominal designations for the same pipe size category; they are not direct substitutes for the measured outside diameter. For layout and clearance work, use the listed 864 mm outside diameter. For internal-space or flow-reference work, use the listed 832.24 mm inside diameter.
The schedule identifies the wall-thickness series for this pipe size. The listed wall thickness affects the difference between outside and inside diameter and is also reflected in the pipe weight. Keep these dimensions distinct when preparing drawings, checking clearances, or comparing adjacent pipe sizes.
Using the Weight Information
The listed pipe weight of 332.14 kg/m is useful for material estimates, handling reviews, support-load discussions, and transport planning. The 875.84 kg/m water-filled value provides a reference for a filled-pipe condition, but an actual operating or support check may also require consideration of contents, fittings, valves, insulation, supports, and project-specific load combinations.
Design and Drafting Checks
- Use the outside diameter when checking spatial envelope, sleeve clearance, and support or clamp arrangement.
- Use the inside diameter as the dimensional reference for internal passage and flow-related discussions.
- Confirm that fittings, flanges, valves, and connection details match the selected pipe specification.
- Review the pipe weight condition required by the project, including empty, operating, testing, or water-filled cases where applicable.
- Verify material, pressure-design requirements, corrosion provisions, fabrication requirements, and applicable project codes before final selection.
Useful Related References
For size comparison, review the linked Schedule 30 Pipe 32 Inch (DN800) and Schedule 30 Pipe 36 Inch (DN900) pages. Comparing adjacent nominal sizes can help identify layout changes, dimensional transitions, and estimating differences during early design.
Frequently Asked Questions
What is the outside diameter of Schedule 30 Pipe 34 Inch?
The listed outside diameter is 864 mm. Use this value for the pipe envelope in layouts, clearance checks, and drafting references.
What is the inside diameter of DN850 Schedule 30 pipe?
The listed inside diameter is 832.24 mm. It is the internal dimensional reference shown for this NPS 34 pipe entry.
What does Schedule 30 mean for this pipe?
Schedule 30 identifies the wall-thickness series for the pipe size. For NPS 34, the listed wall thickness is 15.88 mm.
How much does the pipe weigh?
The listed pipe weight is 332.14 kg/m. The page also provides a water-filled reference weight of 875.84 kg/m.
Are NPS 34 and DN850 the same designation?
They are inch-based and metric nominal references for the same pipe size category on this page. The actual dimensional reference remains the listed outside diameter.
Can this data be used for final pipe selection?
Use the data as a dimensional and estimating reference. Final selection should also be checked against the project specification, material, design conditions, fittings, fabrication requirements, and applicable engineering criteria.