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.