This reference page summarizes the listed dimensions and weight for 22 inch Schedule 80S stainless steel pipe, also identified as DN550. Use the data table for quick checks during piping layout, material takeoff, support coordination, and procurement review.
Before using the listed inside diameter for hydraulic calculations, fabrication, or purchasing, review the page’s data-validation note. The reported OD, ID, and wall thickness should be checked together against the applicable project specification and source table.
Schedule 80S Pipe 22 Inch (DN550) is a stainless steel pipe size used in industrial piping systems where corrosion resistance, standard dimensions, and reliable wall thickness are important. Based on the current page data under ANSI/ASME B36.19, this pipe size is listed with an outside diameter of 559 mm, an inside diameter of 559 mm, a wall thickness of 12.7 mm, and a pipe weight of 171.55 kg/m.
22 Inch Schedule 80S Pipe Dimensions
The following data is shown for NPS 22 Schedule 80S pipe, which corresponds to DN550 in metric designation.
- Pipe Size: NPS 22 Inch
- DN Size: DN550
- Outside Diameter (OD): 559 mm
- Inside Diameter (ID): 559 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 171.55 kg/m
- Pipe Weight Including Water: 245.29 kg/m
- Reference Standard: ANSI/ASME B36.19
Schedule 80S Pipe 22 Inch (DN550) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 80S | 22 Inch | 550 | 559 | 559 | 12.7 | 171.55 |
What Is Schedule 80S Pipe?
Schedule 80S is a stainless steel pipe schedule designation commonly used under ASME B36.19. In piping work, the schedule indicates the wall thickness series for a given nominal pipe size. This helps engineers, fabricators, and buyers confirm pipe dimensions, estimate weight, and coordinate with fittings, flanges, and supports.
Common Uses of 22 Inch Schedule 80S Pipe
22 inch Schedule 80S pipe is commonly used in large stainless steel piping systems where corrosion resistance, durability, and stable wall thickness are required. It is suitable for projects that need large flow capacity together with standard pipe dimensions for design, fabrication, and procurement work.
- Process piping systems in industrial and chemical plants
- Water transmission lines for large-volume piping service
- Cooling water and utility piping in factories and plant facilities
- Marine and offshore piping where stainless steel is preferred
- Food and beverage plants requiring corrosion-resistant piping materials
- Pharmaceutical facilities using stainless steel process lines
- Pump suction and discharge piping for large flow systems
- Pipeline replacement and upgrade work where standard pipe dimensions are needed
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, and piping layout coordination. Final pipe selection should always be verified against project pressure, temperature, fluid service, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for pipe support design, material take-off, transport planning, welding preparation, and installation work. Weight data is also useful when estimating lifting requirements and total piping load.
NPS 22 and DN550 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. On the current page, this pipe is identified as NPS 22 and DN550, which is the standard naming format used in piping drawings, specifications, and procurement documents.
Important Note About the Current ID Value
The page currently shows Inside Diameter (ID) = 559 mm and Outside Diameter (OD) = 559 mm while also listing a 12.7 mm wall thickness. This appears inconsistent and should be checked against the source table or standard before final publishing, because the internal diameter should normally be smaller than the outside diameter when wall thickness is present.
Conclusion
Schedule 80S Pipe 22 Inch (DN550) is listed on the current page with 559 mm OD, 12.7 mm wall thickness, and 171.55 kg/m weight under ANSI/ASME B36.19. It is a useful reference size for stainless steel piping systems, but the current ID value should be rechecked before relying on it for design or procurement.
How to Read This Pipe Reference
NPS 22 and DN550 are nominal size designations used to identify the same referenced pipe size in inch-based and metric documentation. They are useful when comparing piping drawings, equipment connections, fitting descriptions, flange selections, and procurement documents.
The outside diameter helps coordinate the pipe with clamps, supports, sleeves, fittings, and connection details. The wall thickness is used when reviewing fabrication, weld preparation, corrosion allowance requirements, and project specifications. The listed pipe weight supports preliminary material takeoffs, lifting reviews, transport planning, and piping-support load checks.
Design and Drafting Checks
- Confirm that the pipe schedule matches the project piping class and material specification.
- Check the pipe dimensions against connected fittings, flanges, valves, and branch components.
- Use the listed weight consistently when preparing preliminary support and handling calculations.
- Review whether the stated weight includes only the pipe or also the listed water-filled condition.
- Resolve the reported ID discrepancy before using the value for flow-area, velocity, or clearance calculations.
Related Piping References
For broader design context, this page can be reviewed alongside references for stainless steel pipe schedules, nominal pipe size and DN conversion, pipe fittings, flange dimensions, and pipe support design. These related topics help connect the dimensional table to layout, fabrication, and installation decisions without replacing project-specific engineering review.
Why the ID Requires Verification
The current source data reports the same value for OD and ID while also reporting a nonzero wall thickness. Because the inside diameter normally reflects the space remaining after wall thickness is accounted for, the three values should be reconciled before the table is used for hydraulic sizing, internal clearance, or fabrication documentation. This editorial note does not substitute a corrected value for the source data.
Frequently Asked Questions
What size is 22 inch Schedule 80S pipe?
The page identifies it as NPS 22 and DN550. These are nominal designations used in piping drawings, specifications, and procurement documents.
Which standard is referenced for this pipe?
The page identifies ANSI/ASME B36.19 as the reference standard for the listed stainless steel pipe data.
What information is listed for this pipe?
The source table lists the nominal size, DN designation, outside diameter, inside diameter, wall thickness, and pipe weight. It also presents a pipe-weight condition that includes water in the surrounding page content.
Can the listed ID be used directly for flow calculations?
Not without verification. The current source shows the same OD and ID while also showing wall thickness, so the ID should be checked against the source table, project specification, or applicable standard before engineering use.
Why is pipe weight important?
Pipe weight can support preliminary checks for material takeoffs, transport, lifting, support loads, and installation planning. Final calculations should account for the complete piping assembly and project conditions.
Does Schedule 80S alone determine whether the pipe is suitable?
No. Final selection also requires review of material requirements, pressure and temperature conditions, fluid service, corrosion considerations, connections, and the project piping specification.