This reference provides the dimensional data needed to identify and coordinate Schedule 80 Pipe 6 Inch (DN150) in industrial piping work. Use the listed outside diameter, inside diameter, wall thickness, and linear weight when reviewing layouts, fabrication details, supports, and material takeoffs.
The page also explains how Schedule 80 affects the pipe section, why nominal size should not be confused with measured diameter, and which project checks should be completed before purchase or installation. For drafting workflows, the accompanying DWG resource can support coordination with flanges, fittings, valves, clamps, and pipe supports.
Schedule 80 Pipe 6 Inch (DN150) 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 168.3 mm, an inside diameter of 146.36 mm, a wall thickness of 10.97 mm, and a pipe weight of 42.56 kg/m.
Schedule 80 Pipe 6 Inch (DN150) Dimensions
- Pipe Standard: ANSI/ASME B36.10
- Nominal Pipe Size: 6 inch
- DN Size: DN150
- Outside Diameter (OD): 168.3 mm
- Inside Diameter (ID): 146.36 mm
- Wall Thickness: 10.97 mm
- Pipe Weight: 42.56 kg/m
- Pipe Weight Including Water: 59.37 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 6 Inch DN150 Pipe Dimensions Matter
Knowing the exact dimensions of a 6 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 6 Inch (DN150)
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
6 Inch Schedule 80 Pipe Data Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 6 inch | 150 | 168.3 | 146.36 | 10.97 | 42.56 |
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 table and dimension list are useful for different stages of piping work. The outside diameter is typically the key coordination dimension for external components such as clamps, supports, sleeves, and connections. The inside diameter helps engineers and designers review the available flow passage and coordinate internal clearances.
Wall thickness identifies the pipe’s dimensional schedule and contributes to the section’s resistance and mass. It should not be treated as a complete pressure rating by itself. Material grade, temperature, corrosion allowance, joint details, design code, and actual service conditions must also be checked against the project specification.
Schedule 80 Versus Other Pipe Schedules
Pipe schedule is a dimensional classification rather than a universal statement of allowable operating pressure. For a given nominal pipe size, a heavier schedule generally has a thicker wall and a reduced internal passage compared with a lighter schedule. This affects flow calculations, component fit-up, weight estimates, and support design.
Coordination With Fittings and Flanges
When this pipe is connected to fittings or flanges, verify that the mating components use the same nominal pipe size and compatible dimensional system. Check the actual outside diameter, connection type, facing, bore, wall compatibility, and project requirements rather than relying on the nominal designation alone. Related references for pipe fittings, flange dimensions, and pipe schedules can help with this coordination.
Using the Weight Data
The listed pipe weight per meter can support material estimates, handling reviews, and preliminary support-load coordination. The water-inclusive value is a separate reference for considering the pipe and its contents together. Final support reactions and structural checks should include the complete installed arrangement, including fittings, valves, insulation, coatings, fluid conditions, and applicable load combinations.
CAD and Drafting Workflow
The available DWG download can be used as a starting point for layout and fabrication coordination. Before issuing a drawing, confirm units, connection details, centerline geometry, wall representation, and project-specific drafting conventions. A CAD block or reference drawing does not replace dimensional verification against the approved piping specification.
Frequently Asked Questions
What does Schedule 80 mean for 6 inch DN150 pipe?
Schedule 80 identifies the pipe wall-thickness classification for this nominal size. It describes dimensional wall selection; it does not, by itself, establish the allowable pressure or complete service suitability.
What is the difference between 6 inch and DN150?
6 inch is the nominal pipe size designation in the inch-based NPS system, while DN150 is the corresponding nominal designation used in metric terminology. Neither designation should be interpreted as the exact measured inside or outside diameter.
Why are both outside diameter and inside diameter listed?
Outside diameter is important for external fit-up, supports, clamps, and sleeves. Inside diameter is relevant to the flow passage and internal coordination. The two dimensions serve different design and installation checks.
Does Schedule 80 alone determine whether the pipe is suitable?
No. Selection also depends on material grade, design pressure, operating temperature, corrosion allowance, end type, joining method, applicable code, and the service specification.
What should be checked before ordering this pipe?
Confirm the nominal size, dimensional standard, material requirements, end preparation, length basis, coating or lining needs, inspection requirements, and compatibility with the specified fittings and flanges.
Can the DWG file be used directly for fabrication?
The DWG is a drafting reference and should be reviewed before use. Confirm units, dimensions, connection details, tolerances, and project-specific requirements against approved engineering documents.