This reference page gives a quick way to review Schedule 30 Pipe 22 Inch (DN550) data for piping layouts, drafting, estimating, fabrication coordination, and preliminary load reviews. Use the dimensional list and table as the primary lookup source, then confirm project-specific material, manufacturing, joining, and design requirements before issuing fabrication or construction documents.
The page distinguishes the nominal size designation from the listed outside and inside diameters. That distinction is important when checking clearances, modeling pipe in CAD, coordinating fittings, and preparing material takeoffs.
Schedule 30 pipe 22 inch (DN550) is a large-diameter steel pipe size commonly used in piping design, drafting, fabrication, estimation, and industrial layout work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 22 Schedule 30 pipe based on ASME B36.10.
For engineers, designers, estimators, and CAD users, quick access to accurate pipe data helps improve piping layout, support planning, weight checks, transport review, and fabrication coordination during project development.
22 Inch Schedule 30 Pipe Dimensions
- Nominal Pipe Size (NPS): 22 inch
- Diameter Nominal (DN): DN550
- Outside Diameter (OD): 559 mm
- Wall Thickness: 12.7 mm
- Inside Diameter (ID): 533.6 mm
- Pipe Weight: 171.1 kg/m
- Pipe Weight Including Water: 394.61 kg/m
- Standard: ASME B36.10
Schedule 30 Pipe 22 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 22 inch | DN550 | 559 mm | 12.7 mm | 533.6 mm | 171.1 kg/m |
Understanding 22 Inch Schedule 30 Pipe
22 inch Schedule 30 pipe is a large steel pipe size used as a reference in industrial piping layouts, utility systems, water transmission lines, process design studies, and CAD drafting. With an outside diameter of 559 mm and a wall thickness of 12.7 mm, this pipe size is suitable for large-flow applications where designers need a balance between flow capacity and pipe wall strength.
What Does Schedule 30 Mean?
Schedule 30 refers to the wall thickness series of the pipe. For NPS 22, Schedule 30 gives a wall thickness of 12.7 mm. The schedule affects the inside diameter, total pipe weight, fabrication planning, and compatibility with supports, fittings, and structural loading requirements.
Why These Pipe Dimensions Matter
Accurate pipe dimension data is important for piping layouts, spool drawings, support design, structural load review, and material takeoff. Knowing that this pipe weighs 171.1 kg/m helps with transport estimates, lifting plans, and support loading. If the pipe is filled with water, the total weight increases to 394.61 kg/m, which is useful for operating load calculations and support checks.
Common Uses of DN550 Schedule 30 Pipe
DN550 Schedule 30 pipe may be referenced in industrial utility systems, large water transfer lines, plant layout studies, process piping documentation, and engineering design work. It is also useful for piping designers, CAD users, estimators, and procurement teams who need standard steel pipe dimensions for large-diameter piping systems.
Difference Between NPS 22 and DN550
NPS 22 is the inch-based nominal pipe size designation, while DN550 is the metric nominal diameter reference. Both refer to the same pipe size category on this page. The actual standard outside diameter for this size is 559 mm.
How to Use This Data
You can use this page to quickly check:
- pipe outside diameter for layout and clearance
- inside diameter for flow reference
- wall thickness for schedule comparison
- weight per meter for estimation and transport planning
- water-filled weight for support and structural load review
Quick Reference for Schedule 30 Pipe 22 Inch
- Pipe Size: 22 inch
- DN: DN550
- OD: 559 mm
- ID: 533.6 mm
- Wall Thickness: 12.7 mm
- Weight: 171.1 kg/m
- Weight Including Water: 394.61 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 30 Pipe 22 Inch (DN550) is an important large-diameter steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 559 mm outside diameter, 12.7 mm wall thickness, and 171.1 kg/m pipe weight, it provides useful dimensional data for engineers and designers who need fast and accurate pipe information.
Note: NPS = Nominal Pipe Size, DN = Diameter Nominal. Dimensions and weights shown here are based on ASME B36.10 steel pipe data.
How to Read This Pipe Reference
NPS 22 and DN550 are two naming systems used to identify the same pipe size category in this reference. The nominal designation should not be used as a substitute for the listed outside diameter when checking physical space. For layout work, use the stated outside diameter; for a basic internal-bore reference, use the stated inside diameter.
Schedule, wall thickness, and bore
In this entry, Schedule 30 identifies the applicable wall-thickness designation for the listed nominal size. Wall thickness affects the resulting inside diameter and contributes to the pipe’s listed mass per unit length. It also matters when coordinating weld preparations, fittings, supports, insulation clearances, and other items that connect to or surround the pipe.
Using the weight data responsibly
The listed pipe weight is useful for material estimates, handling reviews, support reactions, transport planning, and preliminary structural coordination. The water-filled figure represents the pipe with water added and should be treated as a load-case reference rather than a complete operating-load definition. Actual design review may also need to consider contents, insulation, coatings, valves, fittings, test conditions, support spacing, and project-specific loading requirements.
CAD and drafting workflow
For a CAD model or layout, start with the listed outside diameter and length-based weight information. Check flange faces, fittings, valves, supports, access zones, and insulation allowances separately because those components are not represented by the straight-pipe dimensions alone. The downloadable DWG can support reference work, but users should verify units, layer conventions, insertion scale, and drawing geometry before incorporating it into a controlled project model.
Before using the data for design
- Confirm that the pipe material and applicable specification match the project requirement.
- Check whether the design requires additional wall allowances, corrosion considerations, or manufacturing tolerances.
- Coordinate the pipe dimensions with the selected fittings, flanges, valves, and supports.
- Use the project design basis and responsible engineer’s calculations for pressure, stress, support, and structural decisions.
Frequently Asked Questions
What is the outside diameter of 22 inch Schedule 30 pipe?
The source data lists the outside diameter as 559 mm.
What is the wall thickness of NPS 22 Schedule 30 pipe?
The listed wall thickness is 12.7 mm for this Schedule 30 pipe entry.
What is the inside diameter of DN550 Schedule 30 pipe?
The listed inside diameter is 533.6 mm. Use this value as the reference bore shown on the page, while recognizing that manufactured pipe and completed systems must be checked against applicable project requirements.
How much does 22 inch Schedule 30 pipe weigh?
The listed pipe weight is 171.1 kg/m. This value is useful for estimation, handling, transport, and preliminary support-load coordination.
What is the weight of the pipe when filled with water?
The source lists the pipe weight including water as 394.61 kg/m. Use the project load basis to determine whether additional contents, insulation, fittings, or operating conditions must also be included.
Are NPS 22 and DN550 the same size designation?
On this page, NPS 22 is the inch-based nominal designation and DN550 is the metric nominal reference for the same pipe size category.
Which standard is identified for this pipe data?
The source identifies ASME B36.10 as the reference standard. Project documents should still confirm the required edition, material specification, dimensional tolerances, and other applicable requirements.