This page is a practical reference for Schedule 80 Pipe 22 Inch (DN550) dimensions and related piping terminology. Use the dimensional table below when checking layouts, preliminary material takeoffs, fabrication information, or compatibility with connected piping components.
For broader comparison, pair this reference with related PipeSTD resources on pipe schedules, nominal pipe size and DN conversion, pipe fittings, and pipe flanges. Those topics help explain how the straight-pipe dimensions shown here connect to complete piping assemblies.
Schedule 80 Pipe 22 Inch (DN550 mm) is a carbon steel pipe size commonly used in heavy-duty piping systems where thicker wall construction and stronger mechanical performance are required. This pipe size is typically referenced under ANSI/ASME B36.10, which is the standard used for wrought steel pipe dimensions.
For this size, the pipe has an outside diameter (OD) of 559 mm, an inside diameter (ID) of 501.84 mm, and a wall thickness of 28.58 mm. The listed pipe weight is 373.85 kg/m, while the weight including water is 571.54 kg/m.
Schedule 80 Pipe 22 Inch (DN550 mm) Dimension Table
| Pipe Size | NPS | DN | Outside Diameter (OD) | Inside Diameter (ID) | Wall Thickness | Weight |
|---|---|---|---|---|---|---|
| Schedule 80 Pipe | 22 Inch | DN550 | 559 mm | 501.84 mm | 28.58 mm | 373.85 kg/m |
What Is Schedule 80 Pipe?
Schedule 80 pipe is a heavy-wall steel pipe schedule commonly selected when a thicker wall is needed than lighter schedules such as Schedule 40. In general, the thicker wall of Schedule 80 can provide higher strength, better durability, and greater pressure capability, depending on material grade, design temperature, code requirements, and service conditions.
Pipe schedule selection should always be checked against project requirements such as design pressure, temperature, corrosion allowance, piping code, and fabrication method before final use.
22 Inch Schedule 80 Pipe Data
- Standard: ANSI/ASME B36.10
- Pipe Type: Steel Pipe
- NPS: 22 Inch
- DN: DN550
- OD: 559 mm
- ID: 501.84 mm
- Wall Thickness: 28.58 mm
- Pipe Weight: 373.85 kg/m
- Weight Including Water: 571.54 kg/m
Common Uses of 22 Inch Schedule 80 Pipe
22 inch Schedule 80 steel pipe may be used in applications where a large internal flow path and thicker wall construction are required. Typical uses may include:
- Industrial process piping systems
- Water transmission and utility piping
- Oil and gas piping applications
- Power plant and heavy-duty piping systems
- Projects requiring heavier wall thickness than lighter schedules
Why DN550 Pipe Dimensions Matter
Many users search for DN550 pipe dimensions to verify pipe routing, structural support loads, transportation limits, fabrication details, and compatibility with fittings or connected equipment. For a 22 inch pipe, accurate dimensional data is especially important because weight, lifting, and installation requirements can increase significantly.
Knowing the correct 22 inch Schedule 80 pipe dimensions also helps engineers, detailers, estimators, buyers, and students compare this pipe size with other schedules when reviewing wall thickness, internal flow area, and total pipe weight.
NPS 22 and DN550 Explained
NPS stands for Nominal Pipe Size in inches, while DN stands for Diameter Nominal in metric designation. For this pipe size:
- NPS 22 = inch-based nominal pipe size
- DN550 = metric nominal designation
Although DN is shown in metric form, the actual outside diameter should always be checked from the dimensional standard. For this size, the OD is 559 mm.
Reference for Schedule 80 Pipe 22 Inch
This page provides a quick dimensional reference for engineers, piping designers, students, fabricators, and procurement teams looking for Schedule 80 Pipe 22 Inch (DN550 mm) data in a clear format.
Reference Standard: ANSI/ASME B36.10 steel pipe dimensions.
How to Read This Pipe Dimension Reference
The table reports the pipe’s nominal designation together with its outside diameter, inside diameter, wall thickness, and listed weight. The outside diameter is useful for routing, clearances, clamps, supports, and connection details. The inside diameter describes the available bore for flow and should not be assumed from the nominal inch or DN designation alone.
Wall thickness is the difference between the outside and inside surfaces. It is an important input for dimensional checks, corrosion allowance reviews, fabrication planning, and comparisons with other pipe schedules. A schedule designation identifies a dimensional wall category; it is not, by itself, a complete pressure rating or a substitute for material, temperature, code, and service verification.
Using the Listed Weight in Planning
The listed pipe weight is useful for preliminary support spacing reviews, handling discussions, shipping estimates, and material takeoffs. The separate water-inclusive value provides a reference for the pipe when its internal volume is filled with water. Actual design loading may also include insulation, coatings, valves, fittings, supports, contents with a different density, thermal effects, and other project-specific loads.
Related Piping Checks
- Compare the dimensional data with the applicable pipe schedule reference before selecting an alternate wall category.
- Check the matching fitting dimensions and flange dimensions when developing connection details.
- Use the DWG file as a drafting aid, then confirm project units, tolerances, end preparation, and connection requirements before fabrication.
- Review pipe support and lifting requirements separately; a dimensional reference does not replace an engineered support or handling assessment.
CAD and Drafting Use
The downloadable DWG can support preliminary routing and drawing development for this nominal pipe size. Before issuing a drawing, verify the CAD file against the dimensional data on this page and coordinate it with the selected fittings, flanges, valves, supports, and project drafting conventions.
Frequently Asked Questions
What does NPS 22 mean?
NPS 22 is the inch-based nominal pipe size designation for this pipe. It is used alongside the DN550 metric nominal designation.
Is DN550 the actual outside diameter?
No. DN is a nominal metric designation. The actual outside diameter should be taken from the dimensional data rather than inferred from the DN label.
Does Schedule 80 define the pipe pressure rating?
No. Schedule describes a pipe wall-dimension category. Pressure capability also depends on factors such as material grade, temperature, corrosion allowance, applicable piping code, fabrication, and service conditions.
What is the difference between pipe weight and weight including water?
Pipe weight refers to the listed weight of the empty pipe. The water-inclusive figure represents the listed pipe weight with water inside and is useful for preliminary load discussions. It should not be treated as a complete operating-load calculation.
Can the DWG be used directly for fabrication?
The DWG is a drafting reference. Confirm its dimensions, units, connection details, tolerances, and coordination with fittings and flanges before using it for fabrication or construction.