This reference covers Schedule XS pipe 28 inch (DN700) for engineers, designers, estimators, fabricators, and construction teams who need a dependable dimensional reference during piping work. The page separates nominal size terminology from the actual outside diameter, inside diameter, wall thickness, and listed mass values.
Use the dimensional data with the accompanying explanation when reviewing layouts, preparing material takeoffs, coordinating supports, checking fabrication details, or downloading the related DWG resource. Project specifications, material documentation, and engineering calculations should always be checked before procurement or installation.
Schedule XS Pipe 28 Inch (DN700) 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 28 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.
28 Inch Schedule XS Pipe Dimensions
- Pipe Size: 28 Inch
- Nominal Diameter: DN700
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 711 mm
- Inside Diameter (ID): 685.6 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 218.71 kg/m
- Pipe Weight Including Water: 587.69 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 28 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 28″ | 700 | 711 | 685.6 | 12.7 | 218.71 |
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 28 inch DN700 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 28 Inch DN700 Pipe Dimensions Matter
Knowing the exact dimensions of 28 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 28 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 28 inch, the actual outside diameter is 711 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 28 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 28 Inch XS Pipe Reference
Start with the NPS and DN designations when coordinating drawings, specifications, and equipment connections. Use the outside diameter for external layout, clearance, clamp, and fit-up considerations. Use the inside diameter when reviewing the internal passage and flow-related geometry. The listed wall thickness connects these two dimensions and distinguishes the XS configuration from other schedule selections.
The listed pipe weight is useful for material takeoff, handling review, support-load checks, and transport planning. The separate water-included value should not be confused with the pipe-only mass; it represents a different planning condition for a pipe containing water. Actual project loading may also depend on fittings, valves, insulation, contents, supports, and other attached components.
Coordination With Drawings and Fabrication
For CAD and spool work, confirm that the drawing uses the same NPS, DN, schedule, and dimensional basis as the project documents. The supplied DWG can support drafting coordination, but it should be reviewed against the applicable design requirements before it is used for fabrication or construction.
When preparing a takeoff, keep pipe, fittings, flanges, valves, and supports as separate material categories. This makes it easier to coordinate the straight-pipe dimensions on this page with related references for pipe fittings, flanges, pipe schedules, and CAD/DWG resources.
Checks Before Using the Data
- Confirm that the project calls for 28 inch DN700 and the XS designation.
- Compare the required material specification and purchase documents with the dimensional reference.
- Use the outside diameter for external geometry and the inside diameter for internal geometry.
- Include connected components and operating contents when reviewing support, lifting, or transport loads.
- Coordinate the dimensional data with the applicable piping, welding, pressure, and project requirements.
Frequently Asked Questions
What is the outside diameter of 28 inch Schedule XS pipe?
The listed outside diameter for this 28 inch DN700 XS pipe is 711 mm. This is the external pipe dimension used for many layout and fabrication coordination checks.
What is the inside diameter of 28 inch XS pipe?
The listed inside diameter is 685.6 mm. Inside diameter is the relevant dimensional reference when reviewing the internal passage and flow-related geometry.
What does XS mean in pipe dimensions?
XS means Extra Strong. It identifies a pipe wall designation; the selected wall designation affects the wall thickness, inside diameter, and pipe weight.
How much does 28 inch Schedule XS pipe weigh?
The listed pipe-only weight is 218.71 kg/m. The page also lists a separate value of 587.69 kg/m for pipe including water. Use the appropriate condition for the task being reviewed.
Is a 28 inch pipe the same as DN700?
On this reference page, 28 inch is paired with DN700. These are nominal designations; the actual outside diameter is listed separately as 711 mm.
Can the DWG be used directly for fabrication?
The downloadable DWG is a drafting reference. Review it against the project drawings, material requirements, connection details, and fabrication procedures before using it for production work.