This 4 inch Schedule XXS pipe dimensions reference is intended for engineers, drafters, estimators, fabricators, and project teams who need a clear starting point for heavy-wall steel pipe work. Use the source table for the authoritative dimensional and weight data, then apply the notes below when checking layouts, material takeoffs, fabrication details, and installation planning.
For related work, connect this reference with the site’s guides to NPS and DN pipe terminology, pipe schedules, steel pipe weight calculations, flange dimensions, butt-weld fittings, and pipe support design. These references help explain how the listed pipe data interacts with adjacent piping components and project documentation.
Schedule XXS Pipe 4 Inch (DN100) is a heavy-wall steel pipe size used in industrial piping systems, plant construction, high-duty utility lines, and fabrication work. This page provides a practical reference for the main dimensions and weight of 4 inch XXS pipe based on ANSI/ASME B36.10.
For piping engineers, 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 XXS Pipe Dimensions
- Pipe Size: 4 Inch
- Nominal Diameter: DN100
- Pipe Schedule: XXS (Double Extra Strong)
- Outside Diameter (OD): 114.3 mm
- Inside Diameter (ID): 80.06 mm
- Wall Thickness: 17.12 mm
- Pipe Weight: 41.03 kg/m
- Pipe Weight Including Water: 46.06 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XXS Pipe 4 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 4″ | 100 | 114.3 | 80.06 | 17.12 | 41.03 |
What Does Schedule XXS Mean?
Schedule XXS means Double Extra Strong. It is a heavy-wall pipe designation used for applications that need thicker pipe walls than standard or lighter schedules. A thicker wall affects the inside diameter, pipe weight, fabrication requirements, support loading, and handling during installation.
For a size such as 4 inch DN100 pipe, the jump to XXS creates a much heavier pipe than lighter schedules, so correct dimension and weight data are important for design, lifting, and field work.
Why 4 Inch DN100 XXS Pipe Dimensions Matter
Knowing the exact dimensions of 4 inch Schedule XXS 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: Heavy-wall pipes require accurate weight data for safer handling and crane planning.
- Schedule Comparison: Engineers often compare XXS with XS, STD, Sch 80, Sch 160, or other heavy-wall options during design review.
Typical Applications of 4 Inch Schedule XXS Pipe
This pipe size may be used in:
- Heavy-duty industrial piping
- High-pressure process systems
- Power and utility projects
- Plant piping works
- Oil and gas facilities
- 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 the 4 Inch XXS Pipe Data
Start with the outside diameter when checking routing, clearances, clamps, sleeves, and connections that locate the pipe from its external surface. Use the wall thickness for fabrication details, weld preparation review, and dimensional checks at cut ends. The inside diameter is the relevant dimension for internal flow-area discussions, lining considerations, and compatibility checks with connected components.
The listed mass per unit length is useful for preliminary material takeoffs and for reviewing the loads that pipe, contents, insulation, valves, fittings, and supports may impose on a system. It should not be treated as a complete support or lifting design by itself. The project engineer should also consider the complete assembled system, operating contents, attachments, support arrangement, and applicable design requirements.
Important Checks Before Using the Dimensions
- Confirm the designation: NPS and DN are nominal identifiers, not direct substitutes for measured outside or inside dimensions.
- Check connected components: Verify that flanges, fittings, valves, gaskets, and welding details are compatible with the selected pipe and project requirements.
- Separate dimensions from pressure design: A schedule designation describes a dimensional wall category; it does not by itself establish an allowable pressure, temperature limit, material grade, or corrosion allowance.
- Allow for manufacturing considerations: Actual supplied pipe may require inspection against the purchase specification, including permitted tolerances, material documentation, and end condition.
- Use the CAD file carefully: The downloadable DWG can support drafting and layout workflows, but the project team should confirm drawing units, scale, layer conventions, and revision status before incorporating it into issued documents.
Useful Related References
A practical workflow often moves from pipe size and schedule selection to fitting and flange matching, then to pipe support loads, isometric drafting, and material takeoff. Linking this page to those subjects gives readers a clearer route from a dimensional reference to the broader engineering decisions that depend on it.
Frequently Asked Questions
What does XXS mean for this pipe?
XXS means Double Extra Strong. It identifies a heavy-wall pipe designation. The designation affects wall thickness, internal diameter, mass, fabrication details, and handling considerations.
Is 4 inch the measured outside diameter?
No. The 4 inch description is a nominal pipe size designation. Use the listed outside diameter for routing and connection checks, and use the listed inside diameter for internal-clearance and flow-related reviews.
Does Schedule XXS alone determine the pipe pressure rating?
No. Pressure suitability depends on more than the dimensional schedule. Material specification, design temperature, corrosion allowance, joining method, code requirements, inspection, and project conditions must also be evaluated.
Why is the weight important during project planning?
Pipe weight supports preliminary takeoffs and helps teams review transportation, lifting, support reactions, and installation handling. The complete system load should include contents and attached components where applicable.
Can the DWG file be used directly for construction?
The DWG is a drafting reference. Before use in construction documents, verify its units, geometry, revision, project standards, and consistency with the approved piping and material specifications.