This reference provides the dimensional and weight data for Schedule STD Pipe 34 Inch (DN850), including outside diameter, inside diameter, wall thickness, and mass per unit length. Use the table as a starting point for reviewing large-diameter piping layouts, material take-offs, support loads, fittings, flanges, and transport requirements.
For related work, compare this page with references covering pipe schedules, NPS and DN designations, pipe fittings, flange dimensions, and pipe support design. Those references help connect dimensional data with drafting, procurement, fabrication, and installation decisions.
Schedule STD Pipe 34 Inch (DN850) is a steel pipe size commonly used in large industrial and utility piping systems where standard dimensions, structural reliability, and high flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 864 mm, an inside diameter of 844.94 mm, a wall thickness of 9.53 mm, and a pipe weight of 200.82 kg/m.
34 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 34 Schedule STD pipe, which corresponds to DN850 in metric designation.
- Pipe Size: NPS 34 Inch
- DN Size: DN850
- Outside Diameter (OD): 864 mm
- Inside Diameter (ID): 844.94 mm
- Wall Thickness: 9.53 mm
- Pipe Weight: 200.82 kg/m
- Pipe Weight Including Water: 761.25 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 34 Inch (DN850) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 34 Inch | 850 | 864 | 844.94 | 9.53 | 200.82 |
What Is Schedule STD Pipe?
Schedule STD means Standard Weight in the IPS pipe system and is commonly referenced for carbon steel and steel pipe dimensions under ASME B36.10. In practical piping work, Schedule STD is used as a standard wall thickness designation for many nominal pipe sizes. It helps engineers, fabricators, and buyers confirm dimensional compatibility, estimate weight, and coordinate with fittings, flanges, supports, and structural loads.
Common Uses of 34 Inch Schedule STD Pipe
34 inch Schedule STD pipe is commonly used in very large piping systems where high flow capacity and standard steel pipe dimensions are required. This size is often selected for utility, transmission, and industrial services where large-volume flow and reliable dimensional data are important for design and construction.
- Large water transmission lines for plant and utility service
- Cooling water systems in power plants and industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in large process plants
- Pump suction and discharge lines where large diameter piping is needed
- Municipal and public works projects requiring large steel pipe sizes
- Replacement and upgrade projects where standard pipe dimensions are required
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, handling requirements, and installation planning. Final pipe selection should always be verified against project pressure, temperature, fluid type, corrosion allowance, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for support design, material take-off, transport planning, lifting studies, welding preparation, and installation work. For a pipe as large as 34 inch DN850, accurate weight data is especially useful for crane selection, support design, and logistics planning. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 34 and DN850 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. The current page identifies this pipe as NPS 34 and DN850, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 34 Inch (DN850) is listed on the current page with 864 mm OD, 844.94 mm ID, 9.53 mm wall thickness, and 200.82 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for large piping systems and project coordination.
How to Use This 34 Inch Pipe Reference
The existing table is the dimensional source for this pipe size. Outside diameter is used when coordinating clearances, clamps, sleeves, supports, insulation space, and connections. Inside diameter is relevant to flow-area and hydraulic reviews. Wall thickness identifies the listed pipe section and can affect fabrication details, corrosion allowance reviews, and welding preparation.
The listed pipe weight supports material take-offs, handling studies, transport planning, and preliminary support-load checks. The separate water-inclusive value should be treated as a reference loading condition rather than a substitute for a project-specific operating load. Actual design review may also need to consider fluid density, insulation, valves, fittings, lining, temporary loads, and support spacing.
Drafting and Procurement Checks
- Use both NPS 34 and DN850 when checking drawings, specifications, and purchase documents.
- Confirm that connected fittings, flanges, valves, and branches match the required nominal size and dimensional standard.
- Use the listed OD when checking physical interfaces; do not assume that nominal size is the measured outside diameter.
- Coordinate the pipe data with material specifications, pressure-temperature requirements, corrosion allowance, joining method, and project tolerances.
- For CAD or DWG work, verify the drawing reference against the current project specification before fabrication or construction.
Related PipeSTD References
This page can be used alongside internal references for pipe dimensions and schedules, large-diameter steel pipe, pipe weight calculations, flange selection, fitting dimensions, and piping isometric drafting. Linking these topics helps readers move from a single dimensional entry to a coordinated piping design review.
Frequently Asked Questions
What does Schedule STD mean for this pipe?
Schedule STD means Standard Weight in the inch-based IPS pipe system. It identifies the listed wall designation for this nominal pipe size and helps users coordinate dimensions, weight, fittings, flanges, and supports.
What are the NPS and DN designations for this pipe?
The page identifies the pipe as NPS 34 and DN850. These designations are used together in many drawings, specifications, procurement documents, and piping references.
Should the listed weight be used as the final support load?
No. The listed pipe weight is useful for preliminary estimating and coordination, but final support and structural checks should also consider contents, insulation, fittings, valves, corrosion protection, operating conditions, temporary loads, and the project support arrangement.
Can this dimensional data be used to select fittings and flanges?
It can support an initial compatibility check, but connected components must be verified against the applicable dimensional, material, pressure, facing, and project requirements. Nominal size alone does not confirm complete component compatibility.
Is the inside diameter sufficient for a flow design?
The listed inside diameter provides a dimensional input for preliminary flow-area review. Final hydraulic design should also account for the fluid, operating condition, roughness, fittings, elevation changes, allowable velocity, and system losses.