This reference page helps engineers, designers, fabricators, estimators, and CAD users interpret the dimensions for NPS 22 Schedule 140 pipe. Use the table below when checking pipe geometry, preparing drawings, estimating material weight, or coordinating piping components.
The designation combines a nominal pipe size, a DN designation, and a schedule series. Because these labels describe standardized pipe dimensions rather than a directly measured nominal size, the listed outside diameter, wall thickness, and inside diameter should be used for drafting and calculation work.
Schedule 140 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 140 pipe based on ASME B36.10.
22 Inch Schedule 140 Pipe Dimensions
- Nominal Pipe Size (NPS): 22 inch
- Diameter Nominal (DN): DN550
- Outside Diameter (OD): 559 mm
- Wall Thickness: 47.63 mm
- Inside Diameter (ID): 463.74 mm
- Pipe Weight: 600.67 kg/m
- Pipe Weight Filled With Water: 769.48 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 140 Pipe 22 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 22 inch | 550 | 559 | 47.63 | 463.74 | 600.67 |
What Does Schedule 140 Mean?
Schedule 140 refers to a very heavy wall thickness series used for steel pipe under ASME B36.10. 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 140 Pipe
NPS 22 Schedule 140 pipe is commonly referenced for heavy-duty industrial piping systems where very high wall thickness is required. It may be used in process piping, plant utility systems, structural loading checks, fabrication work, 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, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 22 inch Schedule 140 pipe, the heavy wall thickness results in much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
22 Inch Schedule 140 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 140 pipe?
The outside diameter is 559 mm.
What is the wall thickness of DN550 Schedule 140 pipe?
The wall thickness is 47.63 mm.
What is the inside diameter of NPS 22 Schedule 140 pipe?
The inside diameter is 463.74 mm.
How much does 22 inch Schedule 140 pipe weigh?
The approximate weight is 600.67 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 140 pipe 22 inch (DN550) has an outside diameter of 559 mm, wall thickness of 47.63 mm, inside diameter of 463.74 mm, and a weight of 600.67 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This Pipe Reference
For layout and drafting, the outside diameter is the key dimension for clearances, clamps, supports, sleeves, and connections to other components. The wall thickness is important when reviewing fabrication details, corrosion allowances, machining interfaces, and section properties.
The inside diameter is the practical reference for estimating flow passage and checking internal clearances. It is smaller than the outside diameter because the schedule defines a substantial wall section. The listed mass per meter can also be carried into support reactions, lifting plans, shipping estimates, and line-load checks.
Related Piping Design Checks
- Confirm that the pipe schedule matches the project piping specification and material requirements.
- Use the outside diameter when coordinating flanges, fittings, supports, insulation, and modeled clearances.
- Use the inside diameter when reviewing flow-area assumptions or internal component fit.
- Check whether the stated pipe weight is bare pipe weight or includes an operating medium; the source table distinguishes the listed pipe weight from the water-filled condition.
- Verify supplier data before fabrication or procurement because manufacturing tolerances and material specifications can affect delivered weight.
Drafting and CAD Considerations
When this data is used in a CAD or DWG workflow, model the pipe using the stated outside diameter and wall thickness rather than treating the nominal size as the physical diameter. The downloadable drawing can support reference work, but project drawings should still be checked against the applicable piping specification, connection details, and supplier documentation.
Additional Questions About NPS 22 Schedule 140 Pipe
Is DN550 the same designation as NPS 22?
For this reference, DN550 identifies the metric designation associated with the 22-inch nominal pipe size. The actual dimensional values are provided in the table on this page.
Why is the inside diameter important?
Inside diameter helps describe the available flow passage and supports checks involving internal clearances. It should not be inferred from the nominal size alone; use the listed value for this schedule.
Does a heavier schedule change the outside diameter?
For the same nominal pipe size, the outside diameter remains fixed while the schedule changes the wall thickness. A heavier wall therefore reduces the inside diameter and increases the pipe mass.
Can the listed weight be used as a procurement guarantee?
No. The listed value is a reference based on the stated dimensions. Confirm delivered weight, tolerances, material specification, and supplier documentation before procurement, lifting, or final structural checks.
What related references are useful with this page?
Useful companion references include pipe schedule definitions, ASME B36.10 steel pipe dimensions, NPS-to-DN terminology, pipe weight references, flange dimensions, fitting dimensions, and CAD or DWG piping resources.