This reference provides the dimensional and weight data used to identify Schedule STD Pipe 38 Inch (DN950) in piping layouts, material take-offs, procurement documents, and installation planning. Use the table for the stated outside diameter, inside diameter, wall thickness, and pipe weight, then review the terminology and application notes before coordinating this size with related piping components.
The downloadable DWG file can support drafting and layout workflows. For a complete piping review, compare this reference with related resources for pipe schedules, flanges, fittings, pipe supports, and NPS-to-DN terminology.
Schedule STD Pipe 38 Inch (DN950) is a steel pipe size commonly used in large industrial and utility piping systems where standard dimensions, structural reliability, and high flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 965 mm, an inside diameter of 945.94 mm, a wall thickness of 9.53 mm, and a pipe weight of 224.56 kg/m.
38 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 38 Schedule STD pipe, which corresponds to DN950 in metric designation.
- Pipe Size: NPS 38 Inch
- DN Size: DN950
- Outside Diameter (OD): 965 mm
- Inside Diameter (ID): 945.94 mm
- Wall Thickness: 9.53 mm
- Pipe Weight: 224.56 kg/m
- Pipe Weight Including Water: 926.97 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 38 Inch (DN950) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 38 Inch | 950 | 965 | 945.94 | 9.53 | 224.56 |
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 38 Inch Schedule STD Pipe
38 inch Schedule STD pipe is commonly used in very large piping systems where high flow capacity and standard steel pipe dimensions are required. This size is often selected for utility, transmission, and industrial services where large-volume flow and reliable dimensional data are important for design and construction.
- Large water transmission lines for plant and utility service
- Cooling water systems in power plants and industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in large process plants
- Pump suction and discharge lines where large diameter piping is needed
- Municipal and public works projects requiring large 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 38 inch DN950, accurate weight data is especially useful for crane selection, support design, and logistics planning. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 38 and DN950 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 38 and DN950, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 38 Inch (DN950) is listed on the current page with 965 mm OD, 945.94 mm ID, 9.53 mm wall thickness, and 224.56 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for large piping systems and project coordination.
How to Use This 38 Inch DN950 Pipe Reference
The existing data is most useful when several project tasks require the same dimensional reference. Designers can use the outside diameter when coordinating clearances and connections, while the inside diameter supports flow-area and hydraulic review. Wall thickness helps identify the listed pipe configuration, and pipe weight supports material take-offs, handling studies, support coordination, and transport planning.
- For drafting: Confirm that the pipe geometry agrees with the project drawing, connection details, and the supplied DWG reference.
- For procurement: State the nominal size, schedule designation, applicable dimensional reference, material requirements, and any project-specific requirements separately.
- For layout: Coordinate the pipe with fittings, flanges, valves, supports, access clearances, and nearby equipment.
- For engineering review: Treat dimensional data as one part of the selection process. Pressure, temperature, fluid service, corrosion allowance, material grade, joining method, and applicable design requirements still need project verification.
Related Piping References to Review
This page can serve as a starting point for a broader piping reference workflow. Internal links to the site’s pages on pipe dimensions and schedules, large-diameter pipe fittings, flange dimensions, pipe support design considerations, and DWG piping references would help readers move from the nominal pipe size to connection, layout, and fabrication information.
Dimensional Data Versus Design Selection
A schedule designation identifies a dimensional configuration; it does not by itself establish whether a pipe is acceptable for every service or project condition. The listed size should therefore be checked against the governing project specification and the requirements for pressure containment, temperature, corrosion, fabrication, inspection, supports, and installation. The authoritative values on this page should remain the basis for dimensional coordination, while the responsible engineer confirms service suitability.
Frequently Asked Questions
What does Schedule STD mean for this pipe?
Schedule STD means Standard Weight in the IPS pipe system. It is a standard wall-thickness designation used to coordinate pipe dimensions with fittings, flanges, supports, drawings, and procurement information.
What are the listed dimensions for Schedule STD Pipe 38 Inch (DN950)?
The page lists an outside diameter of 965 mm, an inside diameter of 945.94 mm, and a wall thickness of 9.53 mm. The listed pipe weight is 224.56 kg/m.
Are NPS 38 and DN950 the same designation?
On this page, NPS 38 and DN950 identify the same nominal pipe size using inch-based and metric naming conventions, respectively.
Does the schedule alone determine the pipe pressure rating?
No. A schedule designation describes dimensional information, but pressure suitability also depends on the material, temperature, fluid service, corrosion allowance, design rules, manufacturing requirements, and project specification.
Why is pipe weight important for a large-diameter line?
Pipe weight affects material take-offs, lifting and handling plans, transportation, support coordination, and installation planning. The page also lists a separate weight value including water for the stated reference condition.
Is a DWG file available for this pipe reference?
Yes. The page includes a downloadable DWG reference for Schedule STD Pipe 38 Inch (DN950). Users should verify the drawing against the project’s approved dimensions and drafting requirements before fabrication or construction use.