Schedule XS Pipe 48 Inch (DN1200) is a reference size used when large-bore piping dimensions, fabrication requirements, and handling loads must be coordinated accurately. The table on this page brings together the nominal size, outside diameter, inside diameter, wall thickness, and unit weight for quick review.
Use this reference when checking piping layouts, preparing material takeoffs, reviewing fabrication drawings, or coordinating supports and lifting plans. For related design work, it can be read alongside references covering pipe schedules, flange dimensions, pipe fittings, and CAD/DWG piping details.
Schedule XS Pipe 48 Inch (DN1200 mm) is a large steel pipe size commonly referenced in industrial piping, water transmission systems, process plants, utility lines, and heavy-duty fabrication work. This page provides a quick reference for the main dimensions and weight of 48 inch XS pipe based on ANSI/ASME B36.10.
For engineers, draftsmen, piping designers, estimators, and site teams, having a clear dimensional reference helps reduce mistakes during material selection, fabrication, transport planning, and support design. This page is intended to make the core data easier to read and more useful than a basic size listing.
48 Inch Schedule XS Pipe Dimensions
- Pipe Size: 48 Inch
- Nominal Diameter: DN1200 mm
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 1219 mm
- Inside Diameter (ID): 1193.6 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 377.81 kg/m
- Pipe Weight Including Water: 1496.18 kg/m
- Standard: ANSI/ASME B36.10
Schedule XS Pipe 48 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 48″ | 1200 | 1219 | 1193.6 | 12.7 | 377.81 |
What Is Schedule XS Pipe?
Schedule XS means Extra Strong. It is a pipe wall designation used to identify a thicker pipe wall than lighter schedules. In piping practice, wall thickness affects internal diameter, weight, pressure-related selection, welding preparation, handling requirements, and support loading.
For large sizes such as 48 inch pipe, this information is especially important because even a small change in wall thickness can have a major effect on total weight, lifting method, structural support, and installation planning.
Why These Dimensions Matter
When working with 48 inch DN1200 Schedule XS pipe, dimensional accuracy is important for several reasons:
- Fabrication: OD and wall thickness affect cutting, rolling, beveling, and fit-up work.
- Support Design: Pipe weight per meter is needed for support spacing and structural checks.
- Flow Consideration: ID is useful for estimating flow area and hydraulic calculations.
- Transport and Lifting: Large-diameter pipes require correct weight data for handling and crane planning.
- Material Comparison: Engineers often compare XS with STD, Sch 40, Sch 60, or Sch 80 during design review.
48 Inch DN1200 XS Pipe Applications
This pipe size may be used in:
- Water transmission and intake systems
- Industrial process piping
- Power plant utility piping
- Large infrastructure projects
- Oil and gas facilities
- Custom steel fabrication and spool work
Engineering Notes
NPS stands for Nominal Pipe Size, while DN stands for Diameter Nominal in millimeters. Although the pipe is called 48 inch, the actual outside diameter is 1219 mm, which is the standardized OD used for this size. The inside diameter changes with pipe schedule because it depends on wall thickness.
That means if you compare the same 48 inch pipe in another schedule, the OD usually remains the same, but the ID, wall thickness, and weight will change.
Download and Reference
This page is useful as a quick lookup for piping design, CAD drafting, BOQ preparation, and site coordination. If you maintain downloadable technical files such as DWG drawings, size charts, or dimension references, this post can also support users looking for a reliable 48 inch Schedule XS pipe dimensions reference.
Reference Standard: ANSI/ASME B36.10
How to Read the 48 Inch XS Pipe Reference
The listed NPS and DN values identify the nominal pipe size, while the OD is the standardized external dimension used for layout and connection coordination. The ID is the clear internal dimension associated with the listed wall thickness. These distinctions matter when a drawing includes clearances, supports, fittings, insulation, or connected equipment.
Use the weight data for coordination
The dry pipe weight is useful for material estimating, transport planning, support reactions, and lifting discussions. The water-included value represents a different planning condition and should not be confused with the bare pipe weight. Actual project loading may also require consideration of fittings, valves, flanges, insulation, contents, temporary supports, and other attached items.
Schedule is not a complete design qualification
XS identifies a wall-thickness designation; it does not, by itself, establish the allowable pressure, material grade, corrosion allowance, joint efficiency, temperature limit, or code compliance of an installed piping system. Confirm those requirements against the project specification, material documentation, design code, and applicable engineering calculations before procurement or construction.
Drafting and fabrication checks
- Confirm whether the drawing requires nominal size, OD, ID, or centerline dimensions.
- Coordinate the pipe OD with fittings, flanges, clamps, sleeves, and connected equipment.
- Use the listed wall thickness when reviewing cut sections, bevel details, and fit-up information.
- Check whether the applicable drawing or bill of materials requires bare-pipe weight or a loaded condition.
- Verify field dimensions and project-specific tolerances before fabrication.
For a broader workflow, pair this page with internal references for pipe dimension charts, pipe weight calculations, flange standards, and piping isometric drafting. The downloadable DWG can support CAD coordination, but project drawings should still be checked against the governing specification and fabrication requirements.
Frequently Asked Questions
What does 48 inch Schedule XS pipe mean?
It identifies a 48 inch nominal pipe size with the XS, or Extra Strong, wall designation. The source table provides the corresponding DN, OD, ID, wall thickness, and weight for this reference size.
What is the difference between pipe OD and ID?
OD is the outside diameter used for external layout and connection coordination. ID is the internal opening and is affected by the pipe wall thickness, making it relevant to flow-area and clearance checks.
Does Schedule XS define the pipe pressure rating?
No. Schedule XS describes a wall designation, but pressure suitability also depends on factors such as material, temperature, design code, corrosion allowance, manufacturing requirements, and project specifications.
Why are both pipe weight and water-included weight shown?
The bare-pipe weight supports estimating, transport, lifting, and support calculations for the pipe itself. The water-included value represents a loaded condition and helps users distinguish operating or filled-pipe planning from dry material handling.
Can the DWG file be used directly for fabrication?
The DWG is a useful drafting reference, but fabrication should follow the approved project drawing, material documentation, connection details, tolerances, and applicable quality requirements.