This reference page provides the dimensional and weight data for 22 inch Schedule STD pipe, also identified as NPS 22 and DN550. Use the table below when checking piping layouts, material take-offs, support information, procurement documents, and the fit-up of related components.
For broader reference work, compare this entry with the site’s pipe dimensions and pipe schedule resources. Those references help clarify how nominal size, outside diameter, inside diameter, wall thickness, and schedule designation are used together.
Schedule STD Pipe 22 Inch (DN550) 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 559 mm, an inside diameter of 539.94 mm, a wall thickness of 9.53 mm, and a pipe weight of 129.14 kg/m.
22 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 22 Schedule STD pipe, which corresponds to DN550 in metric designation.
- Pipe Size: NPS 22 Inch
- DN Size: DN550
- Outside Diameter (OD): 559 mm
- Inside Diameter (ID): 539.94 mm
- Wall Thickness: 9.53 mm
- Pipe Weight: 129.14 kg/m
- Pipe Weight Including Water: 357.99 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 22 Inch (DN550) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 22 Inch | 550 | 559 | 539.94 | 9.53 | 129.14 |
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 22 Inch Schedule STD Pipe
22 inch Schedule STD pipe is commonly used in 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 22 inch DN550, 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 22 and DN550 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 22 and DN550, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 22 Inch (DN550) is listed on the current page with 559 mm OD, 539.94 mm ID, 9.53 mm wall thickness, and 129.14 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 22 Inch Pipe Reference
Start with the nominal designation when searching specifications or drawings, then confirm the actual outside diameter, inside diameter, wall thickness, and mass per unit length in the data table. Nominal pipe size is a naming convention; it should not be treated as a direct measurement of the outside or inside diameter.
The outside diameter is particularly useful for layout coordination, clamps, sleeves, supports, and connections. The inside diameter is relevant to hydraulic review and flow-area calculations. Wall thickness helps identify the dimensional configuration, while the listed pipe weight supports material take-offs, handling reviews, support checks, and logistics planning.
Coordination With Piping Components
Dimensional compatibility should be checked across the complete piping assembly rather than for the pipe alone. Related reviews may include pipe fittings, flanges, valves, gaskets, supports, and connection details. The pipe designation and reference standard should remain consistent across drawings, specifications, purchase documents, and fabrication records.
Engineering and Procurement Checks
- Confirm that the selected schedule matches the project specification and service requirements.
- Review pressure, temperature, fluid, corrosion, joining, and material requirements separately from dimensional identification.
- Use the listed dry-pipe weight for appropriate take-off and handling reviews, and treat the water-filled value as a separate planning reference.
- Verify tolerances, manufacturing requirements, testing, coating, and material grade against the governing project documents.
- Check field conditions and connection details before issuing fabrication or installation information.
The downloadable DWG associated with this page can support drafting and coordination workflows. CAD information should still be checked against the project’s approved design documents and the dimensional data shown on this page.
Related Reference Topics
Readers working with large-bore piping may also benefit from internal references on pipe weight, NPS and DN terminology, and piping supports. These topics provide context without replacing project-specific design verification.
Frequently Asked Questions
What does Schedule STD mean for this pipe?
Schedule STD means Standard Weight in the inch-based IPS pipe system. It identifies a standard wall-thickness designation used with the dimensional reference for this pipe size.
What are the NPS and DN designations for this pipe?
This entry identifies the pipe as NPS 22 and DN550. NPS is the nominal pipe size designation in inch units, while DN is the metric nominal designation.
Why are both outside and inside diameter shown?
Outside diameter supports layout, connection, and support coordination. Inside diameter is used when reviewing internal flow space and hydraulic calculations. They describe different aspects of the same pipe and should not be substituted for one another.
Can the listed weight be used for final support design?
The listed weight is useful for preliminary take-offs, handling, logistics, and load reviews. Final support design must also consider the project’s operating condition, contents, insulation, fittings, valves, support spacing, and applicable engineering requirements.
Is the DWG ready for fabrication?
The DWG is provided as a drafting and reference resource. Confirm its dimensions, units, connection details, revision status, and project requirements before using it for fabrication or construction.