This reference provides the dimensional and weight data for 4 inch Schedule STD pipe, also identified as NPS 4 and DN100. Use the table when checking pipe layouts, material takeoffs, support loads, fitting coordination, and drafting requirements.
The page also explains how Schedule STD, NPS, and DN designations are used in piping documents. For drawing work, the downloadable DWG can help with preliminary arrangement and coordination, but project specifications and engineering review remain the controlling requirements.
Schedule STD Pipe 4 Inch (DN100) is a steel pipe size commonly used in industrial and utility piping systems where standard dimensions, structural reliability, and dependable flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 114.3 mm, an inside diameter of 102.26 mm, a wall thickness of 6.02 mm, and a pipe weight of 16.08 kg/m.
4 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 4 Schedule STD pipe, which corresponds to DN100 in metric designation.
- Pipe Size: NPS 4 Inch
- DN Size: DN100
- Outside Diameter (OD): 114.3 mm
- Inside Diameter (ID): 102.26 mm
- Wall Thickness: 6.02 mm
- Pipe Weight: 16.08 kg/m
- Pipe Weight Including Water: 24.28 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 4 Inch (DN100) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 4 Inch | 100 | 114.3 | 102.26 | 6.02 | 16.08 |
What Is Schedule STD Pipe?
Schedule STD means Standard Weight in the IPS pipe system and is commonly referenced for carbon steel and steel pipe dimensions under ASME B36.10. In practical piping work, Schedule STD is used as a standard wall thickness designation for many nominal pipe sizes. It helps engineers, fabricators, and buyers confirm dimensional compatibility, estimate weight, and coordinate with fittings, flanges, supports, and structural loads.
Common Uses of 4 Inch Schedule STD Pipe
4 inch Schedule STD pipe is commonly used in industrial and utility piping systems where good flow capacity and standard steel pipe dimensions are required. This size is often selected for water, cooling, transmission, and plant services where reliable dimensional data is important for design, fabrication, and construction.
- Water transmission lines for plant and utility service
- Cooling water systems in industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in process plants
- Pump suction and discharge lines where larger diameter piping is needed
- Municipal and public works projects requiring steel pipe sizes
- Replacement and upgrade projects where standard pipe dimensions are required
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, handling requirements, and installation planning. Final pipe selection should always be verified against project pressure, temperature, fluid type, corrosion allowance, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for support design, material take-off, transport planning, lifting studies, welding preparation, and installation work. For a pipe as large as 4 inch DN100, accurate weight data is useful for support design, material planning, and installation review. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 4 and DN100 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. The current page identifies this pipe as NPS 4 and DN100, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 4 Inch (DN100) is listed on the current page with 114.3 mm OD, 102.26 mm ID, 6.02 mm wall thickness, and 16.08 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for piping systems and project coordination.
How to Use This 4 Inch Schedule STD Pipe Reference
Start with the dimensional table when you need to confirm the pipe’s outside diameter, inside diameter, wall thickness, or mass per unit length. These values support different checks: outside diameter is important for fitting and support coordination, inside diameter is relevant to flow review, wall thickness supports fabrication and specification checks, and weight assists with handling and structural-load planning.
Use the pipe weight including water value separately from the dry pipe weight when reviewing an operating or filled-pipe condition. The appropriate load case depends on the project and should be coordinated with the piping, structural, and mechanical design documents.
Schedule, Nominal Size, and Actual Dimensions
Schedule STD identifies a standard-weight pipe designation; it is not the same thing as the pipe’s nominal size. NPS 4 and DN100 identify the nominal size, while the listed outside diameter and wall thickness define the dimensional reference for this schedule. This distinction is useful when comparing pipe, fittings, flanges, valves, supports, and procurement descriptions.
Drafting and Procurement Checks
- Confirm that the pipe schedule matches the project piping specification.
- Coordinate the listed outside diameter with fittings, flanges, clamps, sleeves, and supports.
- Use the listed inside diameter for preliminary flow-related review, subject to the project calculation method.
- Check dry and filled-pipe weights against the applicable support and handling conditions.
- Review material grade, corrosion allowance, pressure, temperature, joining method, and applicable project requirements separately from dimensional selection.
The accompanying DWG is useful as a CAD reference for layout and drafting coordination. It should not be treated as a substitute for approved fabrication drawings, certified manufacturer information, or project-specific engineering review.
Frequently Asked Questions
What does Schedule STD mean?
Schedule STD means Standard Weight in the IPS pipe system. It identifies a standard wall designation used with nominal pipe sizes and helps coordinate dimensional, fabrication, procurement, and support requirements.
Is 4 inch pipe the same as DN100?
On this page, NPS 4 corresponds to DN100. Both are nominal designations for the same referenced pipe size; they should be used with the listed actual dimensions rather than treated as the measured outside or inside diameter.
Why are both dry pipe weight and pipe weight including water listed?
They represent different planning conditions. Dry pipe weight supports material and handling estimates, while the filled-pipe value is relevant when reviewing loads for an operating or water-filled condition.
Can the DWG file be used for fabrication?
The DWG is provided as a drafting and reference resource. Fabrication should be based on approved project drawings, verified dimensions, material requirements, tolerances, and applicable engineering review.
Does Schedule STD determine whether the pipe is suitable for a project?
No. Schedule STD provides a dimensional designation. Final suitability also depends on the specified material, pressure and temperature conditions, fluid service, corrosion allowance, joining requirements, and project design criteria.