This reference page presents the dimensional data for Schedule 5S Pipe 16 Inch (DN400 mm), including outside diameter, inside diameter, wall thickness, and listed weight. Use the table as a quick check during piping layout, CAD drafting, material takeoff, fabrication review, and procurement.
Schedule 5S is a stainless steel pipe designation, so the dimensional reference should be considered together with the applicable material specification, project piping code, joining method, and service requirements. The dimensional values below are the authoritative data for this page.
Schedule 5S Pipe 16 Inch (DN400 mm) is a stainless steel pipe size commonly used in industrial piping systems where corrosion resistance and lighter wall thickness are required. This pipe size is typically referenced under ANSI/ASME B36.19, which is the standard used for stainless steel pipe dimensions.
For this size, the pipe has an outside diameter (OD) of 406.4 mm, an inside diameter (ID) of 398.02 mm, and a wall thickness of 4.19 mm. The listed pipe weight is 41.56 kg/m, while the weight including water is 165.91 kg/m.
Schedule 5S Pipe 16 Inch (DN400 mm) Dimension Table
| Pipe Size | NPS | DN | Outside Diameter (OD) | Inside Diameter (ID) | Wall Thickness | Weight |
|---|---|---|---|---|---|---|
| Schedule 5S Pipe | 16 Inch | DN400 | 406.4 mm | 398.02 mm | 4.19 mm | 41.56 kg/m |
What Is Schedule 5S Pipe?
Schedule 5S is a thin-wall stainless steel pipe schedule listed in ASME B36.19. The āSā designation is commonly used for stainless steel pipe schedules. Compared with heavier schedules, Schedule 5S provides a lighter wall thickness and lower pipe weight, which can help reduce handling effort, support load, and fabrication cost in suitable applications.
However, pipe schedule selection should always be reviewed against design pressure, temperature, corrosion allowance, project code, and service conditions before final use.
16 Inch Schedule 5S Pipe Data
- Standard: ANSI/ASME B36.19
- Pipe Type: Stainless Steel Pipe
- NPS: 16 Inch
- DN: DN400
- OD: 406.4 mm
- ID: 398.02 mm
- Wall Thickness: 4.19 mm
- Pipe Weight: 41.56 kg/m
- Weight Including Water: 165.91 kg/m
Common Uses of 16 Inch Schedule 5S Pipe
16 inch Schedule 5S stainless steel pipe may be used in applications where a large internal flow area and corrosion-resistant material are needed. Typical uses may include:
- Water treatment and utility piping systems
- Industrial stainless steel process lines
- Low-pressure transfer piping
- Food and beverage production systems
- Chemical and general fabrication projects
Why DN400 Pipe Dimensions Matter
Many users search for DN400 pipe dimensions to verify piping layout, support spacing, fabrication requirements, transport limits, and compatibility with fittings or connected equipment. For medium- to large-diameter piping, accurate dimensions are important for spool coordination, structural checks, and installation planning.
Knowing the correct 16 inch Schedule 5S pipe dimensions also helps engineers, designers, estimators, buyers, and students compare this size with other schedules when reviewing wall thickness, internal flow area, and total pipe weight.
NPS 16 and DN400 Explained
NPS stands for Nominal Pipe Size in inches, while DN stands for Diameter Nominal in metric designation. For this pipe size:
- NPS 16 = inch-based nominal pipe size
- DN400 = metric nominal designation
Although DN is shown in metric form, the actual outside diameter should always be checked from the dimensional standard. For this size, the OD is 406.4 mm.
Reference for Schedule 5S Pipe 16 Inch
This page provides a quick dimensional reference for engineers, piping designers, students, fabricators, and procurement teams looking for Schedule 5S Pipe 16 Inch (DN400 mm) data in a clear format.
Reference Standard: ANSI/ASME B36.19 stainless steel pipe dimensions.
How to Read the Schedule 5S Pipe Data
The outside diameter (OD) is the external size used when coordinating pipe supports, clamps, openings, insulation space, and connections to fittings. The inside diameter (ID) represents the internal passage available for flow. The difference between these dimensions is related to the pipe wall thickness.
The listed wall thickness is important for fabrication, connection details, corrosion review, and mechanical design checks. It should not be treated as a pressure rating by itself. Allowable use depends on the design pressure, temperature, corrosion allowance, material requirements, code rules, and project-specific service conditions.
Using This Reference in Design and Drafting
- Use the OD when checking clearances, pipe supports, clamps, sleeves, and equipment connections.
- Use the ID when reviewing flow-path geometry or comparing the available bore with connected piping components.
- Use the wall thickness when preparing fabrication details and reviewing whether the selected pipe meets the project specification.
- Use the listed pipe weight for preliminary handling, support, transport, and material-takeoff discussions; confirm the complete installed load with the responsible engineer.
- Check fitting, flange, valve, and gasket references separately because dimensional compatibility involves more than nominal size alone.
Nominal Size Versus Actual Dimensions
NPS 16 and DN400 are nominal designations used to identify the pipe size. They are not a substitute for checking the actual dimensional values in the reference table. For CAD work, spool drawings, and connection coordination, use the stated OD, ID, and wall thickness rather than assuming that the nominal designation is an exact measured diameter.
Weight and Water-Filled Pipe Checks
The page lists both the pipe weight and the weight including water. These values can support early planning for lifting, transportation, support reactions, and installation access. A final support or structural check may also need to consider valves, fittings, insulation, lining, contents other than water, temporary loads, and operating conditions.
Frequently Asked Questions
What are the dimensions of Schedule 5S Pipe 16 Inch (DN400 mm)?
The listed outside diameter is 406.4 mm, the inside diameter is 398.02 mm, and the wall thickness is 4.19 mm. The listed pipe weight is 41.56 kg/m.
What is the difference between NPS 16 and DN400?
NPS 16 is the inch-based nominal pipe size designation, while DN400 is the metric nominal designation. Always use the dimensional data table to verify the actual pipe geometry.
What does the weight including water value represent?
It is the listed mass per unit length when the pipe contains water. The page gives a value of 165.91 kg/m; project-specific load checks may require additional contents and attached-component loads.
Is Schedule 5S suitable for every pressure application?
No. Schedule selection alone does not establish suitability for a particular pressure or temperature service. The responsible engineer should verify the pipe against the governing code, material specification, corrosion allowance, and operating conditions.
Why should the OD be checked when selecting fittings?
The OD affects the physical connection and coordination of fittings, flanges, clamps, supports, sleeves, and equipment nozzles. Nominal size should therefore be confirmed against the applicable component dimensions.