This reference is intended for engineers, drafters, fabricators, estimators, and procurement teams checking 22 inch Schedule 100 pipe dimensions. Use the table to distinguish nominal size from measured outside and inside diameters, then apply the listed wall thickness and weight data to the relevant piping, support, transport, or fabrication review.
For related design work, compare this entry with the site’s resources on pipe schedules, nominal pipe size and DN conversions, pipe fittings, flange dimensions, and pipe weight calculations. Those references help connect the dimensional data to drawings, material takeoffs, and equipment interfaces.
Schedule 100 pipe 22 inch (DN550) is a heavy-wall steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 22 Schedule 100 pipe based on ASME B36.10.
22 Inch Schedule 100 Pipe Dimensions
- Nominal Pipe Size (NPS): 22 inch
- Diameter Nominal (DN): DN550
- Outside Diameter (OD): 559 mm
- Wall Thickness: 34.93 mm
- Inside Diameter (ID): 489.14 mm
- Pipe Weight: 451.45 kg/m
- Pipe Weight Filled With Water: 639.26 kg/m
- Reference Standard: ASME B36.10
Schedule 100 Pipe 22 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 22 inch | 550 | 559 | 34.93 | 489.14 | 451.45 |
What Does Schedule 100 Mean?
Schedule 100 refers to a heavier wall thickness series than lighter schedules such as Schedule 10 or Schedule 40. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness increases according to the schedule. A thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 22 Inch Schedule 100 Pipe
NPS 22 Schedule 100 pipe is commonly referenced for heavy-duty industrial piping systems where higher wall thickness is required. It may be used in process piping, plant utility systems, fabrication work, structural loading checks, and engineering applications where pipe strength and wall thickness are more critical than maximum flow area.
Why Pipe Weight Matters
Pipe weight per meter is essential for transport planning, lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 22 inch Schedule 100 pipe, the heavy wall thickness creates a much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
22 Inch Schedule 100 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material specification, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 22 inch Schedule 100 pipe?
The outside diameter is 559 mm.
What is the wall thickness of DN550 Schedule 100 pipe?
The wall thickness is 34.93 mm.
What is the inside diameter of NPS 22 Schedule 100 pipe?
The inside diameter is 489.14 mm.
How much does 22 inch Schedule 100 pipe weigh?
The approximate weight is 451.45 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for welded and seamless wrought steel pipe.
Conclusion
Schedule 100 pipe 22 inch (DN550) has an outside diameter of 559 mm, wall thickness of 34.93 mm, inside diameter of 489.14 mm, and a weight of 451.45 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This 22 Inch Schedule 100 Reference
Start with the nominal designation: NPS 22 and DN550 identify the pipe size convention, while the outside diameter is the physical dimension used for layout, fittings, clamps, and many connection checks. The schedule identifies the wall-thickness series. In this entry, Schedule 100 has a heavier wall than the lighter schedules discussed in the source content, which reduces the available inside diameter and increases mass.
Dimension checks for drawings
When preparing a piping plan, section, or fabrication detail, use the listed outside diameter for external clearances and the inside diameter for flow-path or bore-related checks. Confirm that mating components, fittings, flanges, insulation, supports, and access clearances use the same dimensional basis. A nominal size label alone is not a substitute for checking the applicable component dimensions.
Weight checks for engineering estimates
The listed pipe weight is useful for preliminary material takeoffs, support reactions, handling plans, and transport estimates. The water-filled value is a separate reference for load assessments involving a filled line. For final lifting or structural work, verify the actual purchase specification, product tolerances, coating or lining, connected components, and the design condition being assessed.
Using the CAD reference
The downloadable DWG can support drafting workflows, but the model should be checked against the dimensional table before it is used in a project drawing. Confirm units, layer conventions, end conditions, and the dimensions of connected components rather than assuming that a generic CAD representation captures every fabrication requirement.
Schedule selection and design review
Schedule 100 is a dimensional wall-thickness designation; it should be reviewed together with the material specification, joining method, design conditions, corrosion allowance, code requirements, and project documentation. This page is a dimensional reference and does not by itself establish pressure capability or project suitability.
Additional Questions About 22 Inch Schedule 100 Pipe
What is the difference between nominal size and outside diameter?
The nominal designation identifies the pipe size convention used in piping documentation. The outside diameter is the physical external dimension used for layout and component coordination. For this entry, use the tabulated outside diameter rather than treating the nominal label as a measured diameter.
Why is the inside diameter smaller for Schedule 100?
For the same nominal pipe size, the outside diameter remains fixed while a heavier schedule uses more of the cross-section for wall thickness. The remaining bore is therefore smaller than it would be with a lighter wall.
Can the listed pipe weight be used as the final lifting load?
No. The listed value is a reference for the pipe itself. A final lifting or support assessment should also consider the purchase condition, tolerances, coatings, connected items, lifting arrangement, and the applicable engineering design requirements.
Why might supplier weight differ from the reference value?
Small differences can result from manufacturing tolerances, the specified material, product condition, and supplier conventions. Use the approved purchase documentation when a project requires a final mass or load value.
What should be checked before using the DWG in a project?
Verify the drawing units, dimensional basis, component interfaces, and project drafting requirements against the authoritative table and approved design documents. The CAD file is a drafting aid, not a replacement for project-specific engineering review.