This reference is intended for engineers, drafters, estimators, fabricators, and project teams checking 34 inch Schedule XS pipe data. Use the dimension list and table together when reviewing layouts, material takeoffs, fabrication details, support concepts, or the accompanying DWG resource.
The nominal size, outside diameter, inside diameter, wall thickness, and mass serve different purposes in piping work. In particular, nominal pipe size should not be treated as the measured outside diameter. For related terminology, connect this page with references covering NPS and DN designations, pipe schedules, and pipe fittings and flanges.
Schedule XS Pipe 34 Inch (DN850) is a large steel pipe size used in industrial piping systems, utility lines, water transmission projects, plant construction, and heavy fabrication work. This page provides a practical reference for the main dimensions and weight of 34 inch XS pipe based on ANSI/ASME B36.10.
For piping engineers, CAD designers, estimators, fabrication teams, and site supervisors, accurate pipe size data is important for layout work, material takeoff, support design, transport planning, and installation checks. This guide presents the essential dimensions in a cleaner format that adds more value than a simple size table.
34 Inch Schedule XS Pipe Dimensions
- Pipe Size: 34 Inch
- Nominal Diameter: DN850
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 864 mm
- Inside Diameter (ID): 838.6 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 266.63 kg/m
- Pipe Weight Including Water: 818.68 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 34 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 34″ | 850 | 864 | 838.6 | 12.7 | 266.63 |
What Does Schedule XS Mean?
Schedule XS stands for Extra Strong. It is a pipe wall designation used in steel pipe standards. The selected schedule affects the wall thickness, which directly affects the inside diameter, pipe weight, fabrication requirements, and support loading.
For a large size such as 34 inch DN850 pipe, wall thickness matters even more because it has a strong effect on lifting weight, handling, structural loading, and installation planning in real projects.
Why 34 Inch DN850 Pipe Dimensions Matter
Knowing the exact dimensions of 34 inch Schedule XS pipe is useful for several engineering and construction tasks:
- Fabrication: OD and wall thickness are needed for cutting, beveling, welding, and fit-up work.
- Support Design: Pipe weight per meter helps engineers check support spacing and structural loads.
- Flow Review: ID is useful for estimating internal flow area and hydraulic performance.
- Transport and Lifting: Large pipe sections require reliable weight data for safe handling.
- Schedule Comparison: Engineers often compare XS with STD, Sch 40, Sch 60, or Sch 80 during design review.
Typical Applications of 34 Inch Schedule XS Pipe
This pipe size may be used in:
- Industrial process piping
- Water transmission systems
- Power and utility projects
- Large plant piping works
- Infrastructure construction
- Custom steel fabrication and spool projects
Engineering Notes
NPS means Nominal Pipe Size, while DN means Diameter Nominal. Although this pipe is called 34 inch, the actual outside diameter is 864 mm according to the standard. The inside diameter changes with the pipe schedule because wall thickness changes from one schedule to another.
That means if you compare the same 34 inch pipe in a different schedule, the OD usually stays the same, while the ID, wall thickness, and pipe weight will change.
Reference
The dimension data on this page is based on ANSI/ASME B36.10, which is widely used for carbon steel pipe dimensions in industrial applications.
How to Use This 34 Inch XS Pipe Reference
Start with the outside diameter when checking spatial clearance, alignment, clamps, fittings, and drafting geometry. Use the wall thickness for fabrication and weld-preparation reviews, while the inside diameter is the relevant dimensional input for flow-area assessments. The listed pipe weight supports preliminary handling, support, and material estimates; the water-filled figure is useful when considering a filled line rather than an empty pipe.
For CAD and drafting workflows, the accompanying DWG file can support layout development and coordination. Confirm that the drawing convention, end preparation, joining components, and project-specific requirements match the design package before issuing fabrication documents. A useful internal-link path is from this page to resources on pipe dimensions, flange dimensions, butt weld fittings, and piping isometrics.
Checks Before Using the Data for Design
- Confirm that the selected schedule agrees with the project piping specification and service requirements.
- Check the applicable material specification, corrosion allowance, manufacturing tolerance, and inspection requirements separately; they are not established by the dimensional table alone.
- Use the pipe mass and filled-line condition as inputs to a project-specific support, lifting, transport, or structural review.
- Coordinate the pipe dimensions with the mating fittings, flanges, valves, gaskets, and connection details.
- Verify the governing project standard and procurement documentation before ordering or releasing fabrication drawings.
The values on this page are a dimensional reference based on the stated standard. They should be coordinated with approved design documents and supplier documentation rather than used as a substitute for pressure design, flexibility analysis, structural verification, or lifting engineering.
Frequently Asked Questions
What does XS mean for 34 inch pipe?
XS means Extra Strong. It identifies a pipe wall designation and affects wall thickness, inside diameter, mass, fabrication considerations, and support loading.
Is 34 inch the same as the outside diameter?
No. The 34 inch designation is a nominal pipe size. The actual outside diameter is the dimensional value shown in the reference data and should be used for layout and component coordination.
Why are both pipe weight and pipe weight including water listed?
The empty-pipe weight supports material, handling, and support estimates. The water-filled value represents a different loading condition and can be relevant when reviewing a filled line.
Can this table be used to select a pipe for a project?
It can support dimensional review and preliminary coordination, but final selection also requires the project specification, material requirements, design conditions, applicable codes, tolerances, and engineering verification.
Is a DWG file available for this pipe size?
Yes. The page includes a downloadable DWG resource. Review the drawing against the approved project details and the dimensions of connected fittings or flanges before using it for fabrication.