Use this reference to check 8 inch Schedule 20 pipe dimensions when preparing piping layouts, CAD drawings, material takeoffs, estimates, or fabrication documents. The page identifies the NPS and DN designations together so inch-based and metric project documentation can be coordinated more easily.
For a quick design review, compare the dimensional table with the available DWG resource and confirm that connected fittings, flanges, supports, and clearances use compatible project data.
Schedule 20 pipe 8 inch (DN200) is a standard 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 8 Schedule 20 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, material takeoff, and fabrication coordination during project development.
8 Inch Schedule 20 Pipe Dimensions
- Nominal Pipe Size (NPS): 8 inch
- Diameter Nominal (DN): DN200
- Outside Diameter (OD): 219.1 mm
- Wall Thickness: 6.35 mm
- Inside Diameter (ID): 206.4 mm
- Pipe Weight: 33.32 kg/m
- Pipe Weight Including Water: 66.76 kg/m
- Standard: ASME B36.10
Schedule 20 Pipe 8 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 8 inch | DN200 | 219.1 mm | 6.35 mm | 206.4 mm | 33.32 kg/m |
Understanding 8 Inch Schedule 20 Pipe
8 inch Schedule 20 pipe is a standard steel pipe size used as a reference in industrial piping layouts, utility lines, water systems, process design studies, and CAD drafting. With an outside diameter of 219.1 mm and a wall thickness of 6.35 mm, this pipe size is useful where a practical flow path is needed while keeping the wall lighter than heavier schedules.
What Does Schedule 20 Mean?
Schedule 20 refers to the wall thickness series of the pipe. For NPS 8, Schedule 20 gives a wall thickness of 6.35 mm. The schedule affects the inside diameter, pipe weight, fabrication requirements, and dimensional coordination with fittings, supports, and layout clearances.
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 33.32 kg/m helps with transport estimates, lifting plans, and support loading. If the pipe is filled with water, the total weight increases to 66.76 kg/m, which is also useful for operating load calculations.
Common Uses of DN200 Schedule 20 Pipe
DN200 Schedule 20 pipe may be referenced in industrial utility systems, water transfer lines, plant layout studies, process piping documentation, and engineering design work. It is also commonly used by piping designers, CAD users, estimators, and procurement teams who need fast access to standard steel pipe dimensions.
Difference Between NPS 8 and DN200
NPS 8 is the inch-based nominal pipe size designation, while DN200 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 219.1 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 20 Pipe 8 Inch
- Pipe Size: 8 inch
- DN: DN200
- OD: 219.1 mm
- ID: 206.4 mm
- Wall Thickness: 6.35 mm
- Weight: 33.32 kg/m
- Weight Including Water: 66.76 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 20 Pipe 8 Inch (DN200) is an important steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 219.1 mm outside diameter, 6.35 mm wall thickness, and 33.32 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
The listed outside diameter is the primary envelope dimension for layout, routing, access, and clearance checks. The inside diameter describes the available bore and can be used as a dimensional reference during flow-area or hydraulic review. The wall thickness links the schedule designation to the pipe section shown on this page.
The listed pipe weight is useful for preliminary material estimates, handling discussions, and support-load review. The water-filled value represents a different operating condition from the empty-pipe value, so the applicable contents, insulation, valves, fittings, and other attached components should be considered separately during a complete load assessment.
Drafting and Design Checks
- Use the outside diameter when checking routing space, sleeve openings, clamp clearances, and support interfaces.
- Use the inside diameter as a reference for flow-path coordination, while leaving hydraulic sizing and process verification to the responsible designer.
- Coordinate the pipe nominal size with fittings and flanges rather than treating the NPS or DN label as the actual measured diameter.
- Use the listed weight for preliminary review, then verify the project material specification and any additional components before final support or structural calculations.
- Open the available DWG reference when a CAD base is needed, and confirm units, scale, layers, and project drafting conventions before incorporating it into a model.
Related Size Comparisons
For adjacent reference points, compare this page with the Schedule 20 Pipe 6 Inch (DN150) and Schedule 20 Pipe 10 Inch (DN250) pages. These comparisons can help reviewers identify changes in nominal size, dimensional envelope, and listed weight without substituting one size for another.
Frequently Asked Questions
What is the actual outside diameter of 8 inch Schedule 20 pipe?
The listed outside diameter is 219.1 mm. Although the pipe is identified as NPS 8, the nominal designation is not the same as the measured outside diameter.
Is NPS 8 the same size designation as DN200?
On this page, NPS 8 and DN200 identify the same nominal pipe size category. The dimensional reference remains the listed outside diameter and wall thickness.
What is the wall thickness?
The Schedule 20 wall thickness listed for this pipe is 6.35 mm. Always use the project specification and applicable engineering review for fabrication or service decisions.
What is the listed weight of the pipe?
The listed pipe weight is 33.32 kg/m. The page also provides a water-filled value of 66.76 kg/m for operating-load reference.
Can this data be used for support design?
It can support preliminary weight and layout checks, but final support design should also account for the project service condition, contents, insulation, fittings, valves, dynamic effects, and the governing engineering requirements.
Is a CAD file available?
Yes. A DWG download is provided on the page for Schedule 20 Pipe 8 Inch (DN200). Review the file units and project drafting standards before using it in production documentation.