This reference page summarizes the dimensional and weight data for 8 inch Schedule 80 pipe, also identified as DN200. It is intended for engineers, designers, fabricators, estimators, and buyers who need a clear starting point for pipe layout, material takeoffs, support planning, or CAD coordination.
Use the dimensional data below when checking clearances, fittings, supports, and connection details. The page also explains how nominal pipe size, outside diameter, inside diameter, wall thickness, and unit weight relate to practical piping work. For related design work, connect this reference with the site’s resources on pipe schedules, NPS and DN terminology, flange dimensions, and pipe weight calculations.
Schedule 80 Pipe 8 Inch (DN200) is a heavy wall steel pipe commonly used in industrial piping systems that require higher strength and thicker pipe walls than lighter schedules. This pipe size is based on ANSI/ASME B36.10 and is widely used in process piping, utility systems, water treatment plants, and mechanical services. For this size, the standard data shows an outside diameter of 219.1 mm, an inside diameter of 193.7 mm, a wall thickness of 12.7 mm, and a pipe weight of 64.64 kg/m.
Schedule 80 Pipe 8 Inch (DN200) Dimensions
- Pipe Standard: ANSI/ASME B36.10
- Nominal Pipe Size: 8 inch
- DN Size: DN200
- Outside Diameter (OD): 219.1 mm
- Inside Diameter (ID): 193.7 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 64.64 kg/m
- Pipe Weight Including Water: 94.09 kg/m
What Is Schedule 80 Pipe?
Schedule 80 refers to a pipe wall thickness classification. For the same nominal pipe size, a Schedule 80 pipe has a thicker wall and a smaller inside diameter than lower schedule pipes. This makes it a practical choice for systems that need additional pipe strength, durability, and long-term service performance.
Why 8 Inch DN200 Pipe Dimensions Matter
Knowing the exact dimensions of a 8 inch Schedule 80 pipe is important for piping design, fabrication, and installation. The outside diameter helps with flange matching, clamps, and supports. The inside diameter affects flow area and system capacity. The wall thickness is important for strength and service conditions, while the pipe weight per meter is useful for transport, lifting plans, and structural support calculations.
Common Uses of Schedule 80 Pipe 8 Inch (DN200)
This pipe size is often used in industrial and commercial piping systems such as:
- Water treatment and utility piping
- Process and plant piping systems
- Oil and gas applications
- Pump stations and mechanical services
- Heavy-duty industrial pipe networks
8 Inch Schedule 80 Pipe Data Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 8 inch | 200 | 219.1 | 193.7 | 12.7 | 64.64 |
Additional Information for Engineers and Buyers
Before selecting this pipe size, it is also important to review the material grade, end type, design pressure, corrosion allowance, operating temperature, and project code requirements. While Schedule 80 defines the dimensional wall category, the final pipe selection should always match the actual service condition and engineering specification.
Note: NPS means nominal pipe size in inches, while DN means diameter nominal in millimeters. These are standard reference sizes used for pipe identification.
How to Use This Schedule 80 Pipe Reference
The listed outside diameter is the primary dimensional reference for many layout and fabrication tasks. It helps users check whether clamps, supports, sleeves, saddles, and connected components are dimensionally compatible. The inside diameter is more relevant to flow calculations, internal clearance, lining considerations, and inspection access.
Because Schedule 80 uses a thicker wall than lighter schedule classifications for the same nominal pipe size, it also changes the available internal flow area and increases the pipe’s mass. Those effects should be considered together rather than evaluating wall thickness alone. A thicker wall may support the requirements of a demanding service, but the correct selection still depends on the complete design basis.
Design and Procurement Checks
- Confirm that the nominal size and DN designation match the project piping specification.
- Use the outside diameter when coordinating flanges, fittings, supports, clamps, and penetration details.
- Use the inside diameter for hydraulic or process calculations, subject to the applicable engineering method and service assumptions.
- Use the listed pipe weight for preliminary handling, transport, and support-load planning; include connected components and contents where required.
- Verify material grade, corrosion allowance, end preparation, joining method, design pressure, temperature, and governing project code before purchase or fabrication.
- Check the downloadable DWG against the dimensional table and incorporate project-specific tolerances, fabrication allowances, and connection details during detailed design.
Related Pipe Reference Topics
This page can serve as a starting point for comparing other pipe schedules at the same nominal size or reviewing nearby NPS and DN references. Related resources on pipe fittings, flange matching, pipe supports, and CAD/DWG pipe details can help carry the dimensional information into layout and fabrication workflows.
Frequently Asked Questions
What does Schedule 80 mean for this pipe?
Schedule 80 is a wall-thickness classification. For the same nominal pipe size, it generally has a thicker wall and a smaller internal opening than a lighter schedule. The schedule does not, by itself, define the material grade or establish allowable service conditions.
Is 8 inch pipe the same as DN200 pipe?
In this reference, 8 inch nominal pipe size is identified with DN200. NPS and DN are nominal designations used to identify pipe size; they should not be treated as direct measurements of the actual outside or inside diameter.
Which dimension is used for pipe support layout?
The outside diameter is normally the key dimension for coordinating supports, clamps, sleeves, and clearances around the pipe. Actual support design must also account for the pipe contents, insulation, connected equipment, operating loads, and project requirements.
Does Schedule 80 determine pressure capacity?
No. Schedule 80 describes a dimensional wall category, not a complete pressure rating. Pressure suitability also depends on material, temperature, corrosion allowance, joining details, code rules, manufacturing requirements, and the specific design calculation.
What should buyers confirm before ordering?
Buyers should confirm the nominal size, schedule, material grade, pipe length, end type, applicable specification, surface or coating requirements, inspection documentation, and delivery requirements. The project specification should govern where it differs from a general reference page.
Is a DWG file available for this pipe reference?
Yes. The page includes a downloadable DWG reference associated with the 8 inch DN200 Schedule 80 pipe entry. Review the drawing together with the dimensional table and verify all project-specific connection and fabrication details before use.