This reference is intended for engineers, designers, fabricators, estimators, and CAD drafters who need to identify NPS 14 Schedule 160 pipe quickly. Use the table below for the dimensional and weight data, then use the explanatory notes to understand how nominal size, schedule, diameter, wall thickness, and mass relate to one another.
For related work, connect this page with your references for pipe schedules, NPS and DN terminology, pipe fittings and flanges, and pipe CAD/DWG resources. These related topics help users move from dimensional lookup to layout, fabrication, and project documentation.
Schedule 160 pipe 14 inch (DN350) is an extra 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 14 Schedule 160 pipe based on ASME B36.10.
14 Inch Schedule 160 Pipe Dimensions
- Nominal Pipe Size (NPS): 14 inch
- Diameter Nominal (DN): DN350
- Outside Diameter (OD): 355.6 mm
- Wall Thickness: 35.71 mm
- Inside Diameter (ID): 284.18 mm
- Pipe Weight: 281.72 kg/m
- Pipe Weight Filled With Water: 345.11 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 160 Pipe 14 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 14 inch | 350 | 355.6 | 35.71 | 284.18 | 281.72 |
What Does Schedule 160 Mean?
Schedule 160 refers to an extra heavy wall thickness series used for steel pipe under ASME B36.10. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness increases according to the schedule. A much thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 14 Inch Schedule 160 Pipe
NPS 14 Schedule 160 pipe is commonly referenced for very heavy-duty industrial piping systems where extremely high wall thickness is required. It may be used in process piping, plant utility systems, structural loading checks, fabrication work, 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, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 14 inch Schedule 160 pipe, the extra heavy wall thickness results in much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
14 Inch Schedule 160 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 14 inch Schedule 160 pipe?
The outside diameter is 355.6 mm.
What is the wall thickness of DN350 Schedule 160 pipe?
The wall thickness is 35.71 mm.
What is the inside diameter of NPS 14 Schedule 160 pipe?
The inside diameter is 284.18 mm.
How much does 14 inch Schedule 160 pipe weigh?
The approximate weight is 281.72 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 160 pipe 14 inch (DN350) has an outside diameter of 355.6 mm, wall thickness of 35.71 mm, inside diameter of 284.18 mm, and a weight of 281.72 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This Pipe Reference
Start with the dimensional table when preparing a piping layout, checking a model, or building a material estimate. NPS 14 and DN350 identify the same nominal pipe size, but the nominal designation should not be treated as the measured inside diameter. The actual outside diameter, wall thickness, and inside diameter are the values to use when checking clearances, connections, and flow passages.
Schedule, diameter, and wall thickness
The schedule identifies a wall-thickness series for a given nominal pipe size. For this page, the outside diameter remains associated with the NPS 14 size while the Schedule 160 wall is substantially heavier than lighter schedule options. Because the wall occupies more of the cross-section, the resulting inside diameter is smaller and the pipe has greater mass.
Using the weight data in project work
The listed pipe weight is useful for preliminary material takeoffs, shipping reviews, lifting plans, support reactions, and structural load checks. It should be coordinated with the project material specification, corrosion allowance requirements, coating or lining, insulation, fittings, valves, and other attached components. The filled-with-water figure is a reference for considering the pipe contents in addition to the pipe itself; it is not a substitute for a complete operating or hydrostatic load assessment.
Important design checks
A schedule designation and dimensional reference do not by themselves establish allowable pressure, temperature limits, corrosion life, joining requirements, or code compliance. Confirm the material grade, manufacturing specification, design conditions, end preparation, flange compatibility, and applicable project or governing code before selecting the pipe for service. For drawings, keep the NPS, DN, schedule, material specification, and connection details clearly identified so the dimensional reference is not confused with a complete procurement specification.
Related reference topics
- Compare this entry with a broader pipe dimensions and schedules reference when reviewing alternate wall series.
- Use an NPS-to-DN guide when coordinating inch-based piping documents with metric equipment or vendor drawings.
- Link the pipe size to matching fittings, flanges, and valves during layout and bill-of-materials preparation.
- Use the available DWG reference for drafting workflows, while checking the project specification before incorporating geometry into issued documents.
Additional Questions About 14 Inch Schedule 160 Pipe
Is Schedule 160 a pressure rating?
No. Schedule 160 identifies a pipe wall-thickness series. Pressure capability must be evaluated using the material specification, design temperature, allowable stress, manufacturing requirements, corrosion considerations, and the applicable piping code.
Why is the nominal size different from the inside diameter?
NPS is a standardized nominal designation rather than a direct statement of the measured bore. The inside diameter changes with wall thickness, so the dimensional table should be used when the available flow passage or physical clearance matters.
Does the pipe weight include fittings, coating, or insulation?
The listed pipe weight describes the pipe reference itself. Fittings, flanges, valves, welds, coatings, linings, insulation, supports, and contents should be accounted for separately when developing a project load or material estimate.
Can the DWG file replace a project drawing review?
No. The DWG is a drafting reference. Review units, layers, connection details, material requirements, tolerances, and project standards before using the geometry in fabrication or issued construction documents.