This reference page brings together the key dimensional and weight data for 6 inch Schedule 40S stainless steel pipe, also identified as NPS 6 and DN150. Use it when checking piping layouts, preparing fabrication drawings, reviewing material takeoffs, or coordinating fittings and supports.
The table below is the primary dimensional reference for this page. The editorial notes that follow explain how to interpret nominal size, schedule, diameter, thickness, and weight without treating any single dimension as a complete design specification.
Schedule 40S Pipe 6 Inch (DN150) is a stainless steel pipe size commonly used in industrial piping systems that require corrosion resistance, dependable wall thickness, and reliable flow capacity. This pipe size is often used in process plants, utility systems, water treatment projects, and stainless steel fabrication work.
This dimension data is based on ANSI/ASME B36.19, which is the standard commonly used for stainless steel pipe dimensions.
6 Inch Schedule 40S Pipe Dimensions
- Pipe Schedule: 40S
- Nominal Pipe Size: 6 Inch
- DN Size: DN150
- Outside Diameter (OD): 168.3 mm
- Inside Diameter (ID): 154.08 mm
- Wall Thickness: 7.11 mm
- Pipe Weight: 28.26 kg/m
- Pipe Weight Including Water: 46.89 kg/m
- Standard: ANSI/ASME B36.19
Schedule 40S Pipe 6 Inch Dimension Table
| Pipe Schedule | NPS (Inch) | DN (mm) | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 40S | 6 | 150 | 168.3 | 154.08 | 7.11 | 28.26 |
What Is 6 Inch Schedule 40S Pipe?
A 6 inch Schedule 40S pipe is a stainless steel pipe with a nominal size of 6 inches and a wall thickness defined by the 40S schedule. For this size, the outside diameter is fixed at 168.3 mm, while the inside diameter is 154.08 mm based on a wall thickness of 7.11 mm.
The letter S in 40S is commonly used for stainless steel pipe dimensions under ASME B36.19. This designation is widely used by engineers, fabricators, and procurement teams when selecting stainless steel piping for industrial service.
Where Is Schedule 40S Pipe 6 Inch Used?
This pipe size is commonly used in systems that need both good flow capacity and the corrosion resistance of stainless steel. Typical applications include:
- Process piping in industrial plants
- Water treatment and utility systems
- Food and beverage piping lines
- Chemical service piping
- Stainless steel header systems
Why Pipe Dimensions Matter
Accurate 6 inch Schedule 40S pipe dimensions are important for piping layout, fabrication, support design, transport planning, and material takeoff. Engineers and designers often check OD, ID, wall thickness, and weight before selecting flanges, fittings, supports, and installation methods.
The outside diameter is important for matching clamps, flanges, and pipe supports. The inside diameter helps estimate flow area and system capacity. The wall thickness is important for specification compliance and mechanical strength, while the pipe weight per meter is useful for structural loading, support design, and handling calculations.
6 Inch Schedule 40S Pipe Weight Information
The nominal weight of this pipe size is 28.26 kg/m. When filled with water, the combined weight becomes approximately 46.89 kg/m. This information is useful for lifting plans, support design, and pipe rack load calculations in industrial projects.
Difference Between NPS 6 and DN150
NPS 6 is the inch-based nominal pipe size, while DN150 is the metric designation used in international drawings and specifications. Both terms refer to the same nominal pipe size, and users may search by either inch or DN format depending on project standards.
Common Search Terms for This Pipe Size
Users may also search for this pipe using related keywords such as 6 inch Schedule 40S pipe dimensions, DN150 Schedule 40S pipe dimensions, 6 inch stainless steel pipe weight, DN150 pipe dimensions, or DN150 sch 40s pipe dimensions.
Conclusion
Schedule 40S Pipe 6 Inch (DN150) has an outside diameter of 168.3 mm, an inside diameter of 154.08 mm, a wall thickness of 7.11 mm, and a weight of 28.26 kg/m. It is a useful stainless steel pipe reference size for design, drafting, fabrication, and procurement work.
This page provides a quick reference for engineers, drafters, fabricators, and buyers who need reliable 6 inch Schedule 40S pipe dimensions and DN150 pipe dimensions in one place.
How to Read This 6 Inch Schedule 40S Pipe Reference
NPS 6, 6 inch, and DN150 are size designations used in different project and documentation systems. They identify the nominal pipe size; they do not mean that the measured outside or inside diameter will equal the nominal designation. For dimensional coordination, use the listed OD and ID rather than the nominal label.
The schedule identifies a standardized wall-thickness designation for the pipe size. In this case, the listed schedule is 40S, where the “S” designation is associated with stainless steel pipe dimensions. Schedule selection should not be treated as a standalone pressure-rating decision. Material grade, design pressure, temperature, corrosion allowance, joining method, code requirements, and manufacturing tolerances may also affect the engineering assessment.
Practical Checks Before Using the Dimensions
- Layout: Use the outside diameter when coordinating clearances, penetrations, clamps, insulation space, and support hardware.
- Flow review: Use the listed inside diameter for preliminary flow-area checks, then complete the hydraulic assessment with the project design basis.
- Fittings and flanges: Confirm that connected components use the same nominal size, dimensional standard, material requirements, and facing details.
- Supports and lifting: Use the listed pipe weight and water-filled weight as reference inputs, while accounting for valves, fittings, insulation, contents, support spacing, and project-specific load combinations.
- Procurement: Confirm the material grade, product form, manufacturing requirements, inspection requirements, and applicable project specification before ordering.
Related Pipe Reference Topics
For broader drafting and specification work, pair this page with the site’s references for pipe dimensions, pipe schedules, pipe fittings, and pipe flanges. These related resources help connect straight-pipe dimensions with the components and terminology used in complete piping assemblies.
The downloadable DWG associated with this page can support drawing coordination, but project users should verify units, scale, layer conventions, and the drawing’s dimensional content before using it for fabrication or construction.
Frequently Asked Questions
What is the OD of 6 inch Schedule 40S pipe?
The listed outside diameter is 168.3 mm. Use the OD for physical coordination with supports, clamps, penetrations, and connected components.
What is the ID of DN150 Schedule 40S pipe?
The listed inside diameter is 154.08 mm. It is the dimensional reference for preliminary flow-area and internal-clearance checks.
What is the wall thickness of 6 inch Schedule 40S pipe?
The listed wall thickness is 7.11 mm. Confirm the applicable material, manufacturing, corrosion, and design requirements before using it for a final engineering check.
How much does 6 inch Schedule 40S pipe weigh?
The listed pipe weight is 28.26 kg/m. The listed combined weight when filled with water is 46.89 kg/m. Actual system loads may also include fittings, valves, insulation, supports, and other contents.
Are NPS 6 and DN150 the same pipe size?
They are different nominal-size designations referring to the same nominal pipe size in this reference. The actual dimensional values should still be taken from the applicable table and project specification.
Does Schedule 40S alone determine the pipe pressure rating?
No. Schedule identifies the dimensional wall-thickness designation, but pressure suitability also depends on factors such as material grade, design temperature, design pressure, corrosion considerations, joining details, and the governing engineering requirements.