This reference provides a focused explanation of 30 inch Schedule XS pipe, also identified as DN750. Use the dimension data below when reviewing layouts, fabrication details, material takeoffs, support loads, and large-bore piping arrangements.
The existing table is the controlling local reference for the listed outside diameter, inside diameter, wall thickness, and weight. The editorial notes that follow explain how to interpret those values and where they fit within broader piping work, including pipe schedules, flange selection, fittings, and CAD/DWG coordination.
Schedule XS Pipe 30 Inch (DN750) 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 30 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.
30 Inch Schedule XS Pipe Dimensions
- Pipe Size: 30 Inch
- Nominal Diameter: DN750
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 762 mm
- Inside Diameter (ID): 736.6 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 234.68 kg/m
- Pipe Weight Including Water: 660.6 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 30 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 30″ | 750 | 762 | 736.6 | 12.7 | 234.68 |
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 30 inch DN750 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 30 Inch DN750 Pipe Dimensions Matter
Knowing the exact dimensions of 30 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 30 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 30 inch, the actual outside diameter is 762 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 30 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 Read the 30 Inch XS Pipe Data
Start with the outside diameter when checking spatial coordination, pipe supports, clamps, sleeves, and connections to other components. Use the inside diameter when reviewing the available flow passage or comparing this pipe with another schedule. Wall thickness connects these two dimensions and also affects fabrication, welding preparation, handling, and the pipe’s listed mass.
The listed pipe weight is useful for estimating the distributed load of the bare pipe. The separate pipe weight including water represents a different loading condition and should not be treated as the complete operating load for a pipeline. Valves, flanges, fittings, insulation, contents other than water, supports, and local attachments may also need to be considered during project calculations.
Schedule Comparison and Coordination
When comparing XS with another schedule, do not compare nominal size alone. Confirm the applicable wall thickness, inside diameter, and weight for each schedule. The outside diameter may remain the same for a given nominal pipe size while the internal passage and mass change. This distinction is important when coordinating butt-weld fittings, pipe flanges, branch connections, and fabrication drawings.
For drafting and model review, the supplied DWG file can support preliminary layout and detailing work. Before issuing a drawing for fabrication or construction, verify the project material specification, end preparation, joining method, tolerances, corrosion allowance, lining or coating requirements, and the dimensions of connected components. The standard reference on this page should be checked alongside the governing project documents.
Practical Checks Before Using the Table
- Confirm that the drawing or bill of materials calls for NPS 30 and DN750, rather than relying on a nominal label alone.
- Check that the selected schedule matches the piping specification and design basis.
- Use the listed outside diameter when coordinating clearances and external interfaces.
- Use the listed inside diameter only for the applicable XS pipe data shown on this page.
- Review whether the support or lifting calculation requires bare-pipe weight, water-filled weight, or a broader operating load case.
- Coordinate related dimensions with the applicable pipe fittings, flanges, and project drawings.
Frequently Asked Questions
What is the outside diameter of 30 inch Schedule XS pipe?
The listed outside diameter is 762 mm. This is the dimension to use when checking external clearances and coordination with supports, clamps, sleeves, and connected components.
What does XS mean in pipe sizing?
XS means Extra Strong. It identifies a pipe wall designation and affects wall thickness, inside diameter, weight, fabrication, and support loading.
Is 30 inch pipe the same as DN750 pipe?
On this reference page, 30 inch is paired with the nominal designation DN750. These are nominal size labels; the actual outside diameter is listed separately in the dimension data.
What is the difference between pipe weight and pipe weight including water?
Pipe weight refers to the pipe itself, while pipe weight including water describes the listed water-filled condition. Project support and operating-load reviews may require additional items such as fittings, flanges, valves, insulation, and attachments.
Can the supplied DWG be used directly for fabrication?
The DWG is a useful reference for preliminary layout and drafting coordination. Fabrication use requires confirmation against the project specification, connected components, fabrication requirements, and approved drawings.