Use this page as a quick reference when checking 16 inch Schedule 100 pipe dimensions for piping layouts, material takeoffs, fabrication documents, and engineering estimates. It brings together the NPS designation, DN equivalent, outside diameter, wall thickness, inside diameter, and pipe weight so these values can be reviewed before detailed design or procurement.
For related reference work, compare this entry with other pipe schedules, review pipe dimensions and weights, and check the available CAD/DWG pipe resources when preparing drawings.
Schedule 100 pipe 16 inch (DN400) is a heavy-wall steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 16 Schedule 100 pipe based on ASME B36.10.
16 Inch Schedule 100 Pipe Dimensions
- Nominal Pipe Size (NPS): 16 inch
- Diameter Nominal (DN): DN400
- Outside Diameter (OD): 406.4 mm
- Wall Thickness: 26.19 mm
- Inside Diameter (ID): 354.02 mm
- Pipe Weight: 245.57 kg/m
- Pipe Weight Filled With Water: 343.95 kg/m
- Reference Standard: ASME B36.10
Schedule 100 Pipe 16 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 16 inch | 400 | 406.4 | 26.19 | 354.02 | 245.57 |
What Does Schedule 100 Mean?
Schedule 100 refers to a heavier wall thickness series than lighter schedules such as Schedule 10 or Schedule 40. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness increases according to the schedule. A thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 16 Inch Schedule 100 Pipe
NPS 16 Schedule 100 pipe is commonly referenced for heavy-duty industrial piping systems where higher wall thickness is required. It may be used in process piping, plant utility systems, fabrication work, structural loading checks, and engineering applications where pipe strength and wall thickness are more critical than maximum flow area.
Why Pipe Weight Matters
Pipe weight per meter is essential for transport planning, lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 16 inch Schedule 100 pipe, the heavy wall thickness creates a much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
16 Inch Schedule 100 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material specification, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 16 inch Schedule 100 pipe?
The outside diameter is 406.4 mm.
What is the wall thickness of DN400 Schedule 100 pipe?
The wall thickness is 26.19 mm.
What is the inside diameter of NPS 16 Schedule 100 pipe?
The inside diameter is 354.02 mm.
How much does 16 inch Schedule 100 pipe weigh?
The approximate weight is 245.57 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for welded and seamless wrought steel pipe.
Conclusion
Schedule 100 pipe 16 inch (DN400) has an outside diameter of 406.4 mm, wall thickness of 26.19 mm, inside diameter of 354.02 mm, and a weight of 245.57 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Read This Pipe Reference
NPS 16 and DN400 identify the same nominal pipe size using different designation systems. The nominal size should not be treated as the measured inside diameter: the actual outside diameter and wall thickness determine the listed inside diameter.
The schedule is especially important when comparing alternatives within the same nominal size. The outside diameter remains the primary envelope dimension, while the selected wall thickness changes the available bore and the mass of the pipe. For layout work, this distinction helps prevent confusion between nominal size, outside diameter, and inside diameter.
Design and Drafting Checks
- Use the outside diameter when checking clearances, supports, clamps, sleeves, and connection geometry.
- Use the wall thickness when preparing fabrication details or reviewing the dimensional basis of the pipe.
- Use the inside diameter when checking bore-related requirements, while recognizing that final flow assessment also depends on the piping system and service conditions.
- Use the pipe weight for preliminary handling, support, lifting, and structural load discussions; verify project requirements, material specification, tolerances, and supplier data before finalizing design.
The listed water-filled weight is useful for understanding the additional operating load associated with a filled line. It should be considered separately from the empty pipe weight when reviewing supports, transport, and installation conditions.
Related Pipe Reference Topics
This page can serve as a starting point for related resources on Schedule 40 and Schedule 10 comparisons, steel pipe fittings, flange dimensions, and piping terminology. Linking those topics here helps readers move from a single dimensional lookup to the broader checks required for drafting and piping design.
The downloadable DWG reference at the end of the page can support drawing preparation, but dimensions should still be checked against the project specification and the applicable component data before fabrication or construction use.
Additional Questions About This Reference
Is Schedule 100 a complete pipe specification?
No. A schedule identifies a dimensional wall-thickness series for the nominal pipe size. Material grade, manufacturing requirements, end preparation, tolerances, testing, and service design requirements must be confirmed separately.
Which dimension should be used for a pipe layout?
Use the outside diameter for envelope and clearance checks, and use the inside diameter for bore-related checks. The wall thickness provides the dimensional difference between these two diameters.
Can the published pipe weight be used as the final installed load?
It is a reference value for estimating and preliminary checks. Final installed loads should account for the project specification, actual product data, supports, attachments, contents, insulation, and other applicable loads.
What should be checked before using the DWG file?
Confirm the drawing units, nominal size, schedule, dimensional basis, connection details, and project drafting requirements. The DWG should be treated as a reference resource rather than a substitute for approved design documents.