Use this page as a quick reference when a drawing, material takeoff, or fabrication check calls for 4 inch Schedule XS pipe. The table below brings together the nominal size, outside and inside diameters, wall thickness, and weight data for this DN100 steel pipe designation.
For practical project work, check the dimensional data against the applicable purchase specification and project requirements. The values can support drafting and estimating, but final fabrication, support, lifting, and piping-system decisions also depend on the selected material, components, operating conditions, and engineering review.
Schedule XS Pipe 4 Inch (DN100) is a steel pipe size commonly used in industrial piping systems, utility lines, water transmission projects, plant construction, and fabrication work. This page provides a practical reference for the main dimensions and weight of 4 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.
4 Inch Schedule XS Pipe Dimensions
- Pipe Size: 4 Inch
- Nominal Diameter: DN100
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 114.3 mm
- Inside Diameter (ID): 97.18 mm
- Wall Thickness: 8.56 mm
- Pipe Weight: 22.32 kg/m
- Pipe Weight Including Water: 29.73 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 4 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 4″ | 100 | 114.3 | 97.18 | 8.56 | 22.32 |
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 size such as 4 inch DN100 pipe, wall thickness remains important because it affects total pipe weight, handling requirements, support loads, and installation planning in real projects.
Why 4 Inch DN100 Pipe Dimensions Matter
Knowing the exact dimensions of 4 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: Accurate weight data supports safer handling and planning.
- Schedule Comparison: Engineers often compare XS with STD, Sch 40, Sch 60, or Sch 80 during design review.
Typical Applications of 4 Inch Schedule XS Pipe
This pipe size may be used in:
- Industrial process piping
- Water transmission systems
- Power and utility projects
- 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 4 inch, the actual outside diameter is 114.3 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 4 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 steel pipe dimensions in industrial applications.
How to Use This 4 Inch XS Pipe Reference
The listed outside diameter is the key interface dimension for many layout and connection checks. It helps CAD designers coordinate pipe runs, fittings, clamps, sleeves, and openings. The inside diameter is more relevant when reviewing the available flow passage or checking transitions between different pipe schedules.
Wall thickness connects the schedule designation to both the internal passage and the mass of the pipe. When comparing this pipe with another 4 inch schedule, do not assume that all dimensional properties remain unchanged. Review the complete row in the table, especially the inside diameter, wall thickness, and weight.
Drafting, Takeoff, and Fabrication Checks
- CAD and layout: Use the outside diameter for envelope checks and the inside diameter when the internal passage affects a design review.
- Material takeoff: Combine the listed weight per metre with the modeled or measured pipe length; account separately for fittings, flanges, valves, insulation, and supports.
- Fabrication: Confirm the ordered pipe specification before cutting, beveling, welding, or fitting components. Dimensional compatibility alone does not establish weld or service requirements.
- Support and handling: The pipe weight and the water-included value provide useful planning inputs, but actual support and lifting checks should include the complete installed assembly and applicable project criteria.
Related Pipe Reference Topics
This page works well alongside references for NPS and DN terminology, pipe schedules and wall thickness, steel pipe dimensions, pipe fittings and flanges, and CAD/DWG pipe resources. Linking these topics helps readers move from a single dimensional lookup to the surrounding drafting and piping-design information they need.
Frequently Asked Questions
What does 4 inch Schedule XS pipe mean?
It identifies a steel pipe with a nominal pipe size of 4 inch, a nominal diameter designation of DN100, and the XS, or Extra Strong, wall designation. The page table gives the associated dimensions and weight.
Does the outside diameter change when the pipe schedule changes?
For the same nominal pipe size, the outside diameter is generally the stable reference dimension shown in the applicable dimensional standard, while the schedule changes the wall thickness, inside diameter, and weight. Always verify the specific schedule row before using it in a drawing or takeoff.
What is the difference between pipe weight and pipe weight including water?
Pipe weight describes the pipe itself. The water-included value represents the pipe with water in its internal passage, making it useful for preliminary handling and support-load discussions. Other contents, coatings, insulation, fittings, and attachments require separate consideration.
Can this table be used to select a pipe for a project?
It is a dimensional reference, not a complete design-selection procedure. Material grade, joining method, corrosion allowance, operating conditions, code requirements, and project specifications must be reviewed by the responsible engineering team.
Is the DWG file useful for drafting?
The downloadable DWG can support layout and reference work. Before issuing a drawing, confirm that the modeled geometry matches the required pipe size, schedule, end condition, fittings, and project drafting standards.