Use this page as a quick reference for 22 inch Schedule 5 pipe dimensions and the equivalent DN550 designation. The dimensional data below supports early-stage piping layout, material takeoffs, fabrication planning, and drawing coordination.
When using the values for a project, confirm the material specification, manufacturing requirements, design code, corrosion allowance, and applicable project tolerances separately. A pipe schedule identifies a dimensional wall category; it does not by itself establish an allowable pressure or complete design rating.
Schedule 5 Pipe 22 Inch (DN550) is a large steel pipe size commonly used in industrial piping systems that require high flow capacity with a relatively light wall thickness. This pipe size is often used in utility piping, water transfer systems, low-pressure industrial service, and general steel pipe fabrication work.
This dimension data is based on ANSI/ASME B36.10, which is the standard commonly used for carbon steel pipe dimensions.
22 Inch Schedule 5 Pipe Dimensions
- Pipe Schedule: 5
- Nominal Pipe Size: 22 Inch
- DN Size: DN550
- Outside Diameter (OD): 559 mm
- Inside Diameter (ID): 549.44 mm
- Wall Thickness: 4.78 mm
- Pipe Weight: 65.33 kg/m
- Pipe Weight Including Water: 302.3 kg/m
- Standard: ANSI/ASME B36.10
Schedule 5 Pipe 22 Inch Dimension Table
| Pipe Schedule | NPS (Inch) | DN (mm) | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 5 | 22 | 550 | 559 | 549.44 | 4.78 | 65.33 |
What Is 22 Inch Schedule 5 Pipe?
A 22 inch Schedule 5 pipe is a steel pipe with a nominal size of 22 inches and a relatively thin wall thickness compared with heavier schedules. For this size, the outside diameter is fixed at 559 mm, while the inside diameter is 549.44 mm based on a wall thickness of 4.78 mm.
Schedule 5 pipe is often selected when a project needs large flow capacity, reduced pipe weight, and easier handling compared with thicker wall pipes. It is commonly referenced in steel piping design, drafting, fabrication, and material takeoff work.
Where Is Schedule 5 Pipe 22 Inch Used?
This pipe size is commonly used in applications that need large flow capacity with relatively light wall thickness. Typical uses include:
- Water transfer and distribution systems
- Utility and low-pressure industrial piping
- Large process and service lines
- Pipe spool fabrication and layout work
- General steel piping projects
Why Pipe Dimensions Matter
Accurate 22 inch Schedule 5 pipe dimensions are important for piping layout, fabrication, transport planning, support design, and installation work. Engineers and designers often check OD, ID, wall thickness, and weight before selecting supports, fittings, welding details, and handling methods.
The outside diameter is important for matching supports, clamps, and pipe accessories. The inside diameter helps estimate internal flow area and system capacity. The wall thickness affects mechanical strength and specification compliance, while the pipe weight per meter is useful for lifting plans, transport, and structural loading calculations.
22 Inch Schedule 5 Pipe Weight Information
The nominal weight of this pipe size is 65.33 kg/m. When filled with water, the combined weight becomes approximately 302.3 kg/m. This information is useful for pipe support design, structural coordination, and lifting preparation in large piping systems.
Difference Between NPS 22 and DN550
NPS 22 is the inch-based nominal pipe size, while DN550 is the metric designation used in international drawings and specifications. Both terms refer to the same nominal pipe size, and users may search by either inch size or DN format depending on project standards.
Common Search Terms for This Pipe Size
Users may also search for this pipe using related keywords such as 22 inch Schedule 5 pipe dimensions, DN550 Schedule 5 pipe dimensions, 22 inch pipe weight per meter, DN550 pipe dimensions, or DN550 sch 5 pipe dimensions.
Conclusion
Schedule 5 Pipe 22 Inch (DN550) has an outside diameter of 559 mm, an inside diameter of 549.44 mm, a wall thickness of 4.78 mm, and a weight of 65.33 kg/m. It is a useful steel pipe reference size for design, drafting, fabrication, and procurement work.
This page provides a quick reference for engineers, drafters, fabricators, and buyers who need reliable 22 inch Schedule 5 pipe dimensions and DN550 pipe dimensions in one place.
How to Read the DN550 Schedule 5 Reference
The listed outside diameter is the primary interface dimension for supports, clamps, sleeves, fittings, and other components that contact the pipe exterior. The inside diameter is more useful when reviewing flow area, internal clearances, or connections to process equipment.
Wall thickness connects the outside and inside diameter values and should be checked against the project specification before fabrication. The listed mass per meter can support preliminary transport, lifting, support, and structural coordination work, while the water-filled value helps identify the additional operating load when the line is full.
Design and Drafting Checks
- Use the nominal size and DN designation consistently across plans, isometric drawings, bills of material, and purchase documents.
- Coordinate the outside diameter with pipe supports, guides, clamps, insulation, sleeves, and access clearances.
- Use the listed weight for preliminary load coordination, then verify the final pipe, coating, lining, insulation, contents, and support condition for the project.
- Confirm that connected fittings, flanges, valves, and branch components use compatible dimensions and specifications.
- Check whether the selected material and wall category satisfy the governing design, fabrication, welding, and inspection requirements.
Related Pipe Reference Topics
Readers comparing this size with other options may also benefit from the site’s references on pipe schedules, NPS and DN conversion, pipe outside diameter, pipe wall thickness, pipe weight calculation, and steel pipe fittings and flanges. These topics provide useful context when moving from a dimensional lookup to a coordinated piping design.
Frequently Asked Questions
What does Schedule 5 mean for this pipe?
Schedule 5 identifies the dimensional wall category listed for the nominal pipe size. It should not be treated as a complete pressure rating because pressure capability also depends on material, temperature, design code, manufacturing condition, joining method, and other project requirements.
Are NPS 22 and DN550 the same nominal size?
Yes. NPS 22 is the inch-based designation and DN550 is the metric designation used for the same nominal pipe size. The outside diameter and other dimensional values should still be taken from the applicable pipe reference and project specification.
Which dimension is most important for pipe supports?
The outside diameter is generally the key interface dimension for supports, clamps, guides, sleeves, and similar external components. Support design must also account for the pipe’s operating condition, contents, insulation, restraint arrangement, and applicable engineering requirements.
Why is the water-filled weight useful?
The water-filled weight provides a reference for the additional load associated with a full line. It can assist preliminary support and structural coordination, but the final design should include all applicable contents, attachments, insulation, lining, and operating loads.
Can this reference replace a project pipe specification?
No. This page is a dimensional reference. Procurement and design documents should also identify the required material, manufacturing standard, joining requirements, inspection requirements, and design conditions.