This reference provides a practical starting point for checking Schedule 40S Pipe 2 Inch (DN50) dimensions during piping layout, drafting, fabrication, and procurement. Use the dimension data below to distinguish nominal size from measured outside and inside dimensions, then confirm project-specific material, fabrication, and design requirements before ordering or installation.
For related design work, compare this page with references covering stainless steel pipe schedules, pipe fittings, flanges, and pipe support loads. Those topics help connect a dimensional reference to the components and coordination checks used in a complete piping system.
Schedule 40S Pipe 2 Inch (DN50) 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.
2 Inch Schedule 40S Pipe Dimensions
- Pipe Schedule: 40S
- Nominal Pipe Size: 2 Inch
- DN Size: DN50
- Outside Diameter (OD): 60.3 mm
- Inside Diameter (ID): 52.48 mm
- Wall Thickness: 3.91 mm
- Pipe Weight: 5.44 kg/m
- Pipe Weight Including Water: 7.6 kg/m
- Standard: ANSI/ASME B36.19
Schedule 40S Pipe 2 Inch Dimension Table
| Pipe Schedule | NPS (Inch) | DN (mm) | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 40S | 2 | 50 | 60.3 | 52.48 | 3.91 | 5.44 |
What Is 2 Inch Schedule 40S Pipe?
A 2 inch Schedule 40S pipe is a stainless steel pipe with a nominal size of 2 inches and a wall thickness defined by the 40S schedule. For this size, the outside diameter is fixed at 60.3 mm, while the inside diameter is 52.48 mm based on a wall thickness of 3.91 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 2 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 branch and service lines
Why Pipe Dimensions Matter
Accurate 2 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.
2 Inch Schedule 40S Pipe Weight Information
The nominal weight of this pipe size is 5.44 kg/m. When filled with water, the combined weight becomes approximately 7.6 kg/m. This information is useful for lifting plans, support design, and pipe rack load calculations in industrial projects.
Difference Between NPS 2 and DN50
NPS 2 is the inch-based nominal pipe size, while DN50 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 2 inch Schedule 40S pipe dimensions, DN50 Schedule 40S pipe dimensions, 2 inch stainless steel pipe weight, DN50 pipe dimensions, or DN50 sch 40s pipe dimensions.
Conclusion
Schedule 40S Pipe 2 Inch (DN50) has an outside diameter of 60.3 mm, an inside diameter of 52.48 mm, a wall thickness of 3.91 mm, and a weight of 5.44 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 2 inch Schedule 40S pipe dimensions and DN50 pipe dimensions in one place.
How to Use This Pipe Dimension Reference
Start with the nominal designations: NPS 2, DN50, and 40S. These labels identify the pipe size and schedule convention, but they should not be treated as a direct measurement of the pipe’s outside or inside diameter. The OD, ID, and wall thickness listed in the table are the values to use when checking physical clearance, fitting interfaces, and layout space.
For drafting and coordination, the outside diameter is generally the key envelope dimension. Check it against pipe supports, clamps, sleeves, insulation space, neighboring lines, and fitting connection details. The inside diameter is more relevant to flow-area estimates and hydraulic review, while wall thickness is used when checking the specified pipe construction and fabrication requirements.
Checks to Make Before Procurement or Fabrication
- Confirm that the project specification calls for stainless steel pipe dimensions under the applicable standard.
- Verify the material grade, product form, end preparation, and surface or finishing requirements separately from the schedule designation.
- Coordinate the pipe with the selected elbows, tees, reducers, flanges, valves, and branch connections.
- Use the listed pipe weight for preliminary handling and support coordination, then complete project-specific structural and lifting checks.
- Review operating service, corrosion requirements, temperature, pressure, joining method, and applicable design codes with the responsible engineer.
Nominal Size Is Not a Direct Measurement
The terms 2 inch and DN50 are nominal size designations. They are useful for identifying compatible piping components and searching drawings or specifications, but the listed OD and ID control physical coordination. This distinction is especially important when a project uses both inch-based and metric documentation.
Weight and Filled-Pipe Coordination
The dry pipe weight and the pipe weight including water serve different coordination purposes. The dry value supports material takeoffs, transport planning, and handling estimates. The filled value is useful when considering operating loads on supports and pipe racks. Neither value replaces a complete load assessment that considers valves, fittings, insulation, contents, support spacing, and dynamic or occasional loads.
For additional reference work, link this page to the site’s related pipe dimension tables, schedule charts, stainless steel fittings references, and DWG pipe resources. These connections help readers move from a single pipe size to the surrounding design and drafting information.
Frequently Asked Questions
What does 2 inch Schedule 40S pipe mean?
It identifies a stainless steel pipe with the nominal pipe size NPS 2 and the 40S schedule designation used for stainless steel pipe dimensions. The schedule designation describes the dimensional series; it is not, by itself, a complete pressure or design specification.
Is NPS 2 the same as DN50?
Yes. NPS 2 and DN50 are different nominal designations for the same pipe size reference. The actual outside diameter and wall thickness should still be taken from the applicable dimension data rather than inferred from the label alone.
Which dimension is most important for pipe layout?
The outside diameter is usually the primary envelope dimension for layout, supports, sleeves, clamps, and clearance checks. The inside diameter and wall thickness remain important for flow review, specification compliance, and mechanical assessment.
Can the listed pipe weight be used for support design?
It can support preliminary load coordination, but a final support design should account for the complete installed system. Include the pipe contents, fittings, valves, insulation, support arrangement, and applicable project loading conditions.
Does Schedule 40S identify the stainless steel grade?
No. The schedule identifies a dimensional series. The stainless steel grade, corrosion requirements, product specification, and joining requirements must be confirmed separately in the project documents.
Is this page enough to select pipe for a pressure system?
No. Dimensional data is only one part of selection. Pressure design, temperature, corrosion, material compatibility, fabrication, inspection, code compliance, and project requirements should be reviewed by the responsible engineering team.