This reference page brings together the key dimensional and weight information for 14 inch Schedule 60 pipe, also identified as NPS 14 and DN350. Use the source table to check the outside diameter, inside diameter, wall thickness, and listed pipe weight before preparing layouts, material takeoffs, or procurement documents.
The explanatory notes below also clarify how NPS, DN, pipe schedule, and weight data are used in practical piping work. For related design checks, compare this page with the site’s references for pipe dimensions and schedules, steel pipe fittings, and pipe flange dimensions.
Schedule 60 Pipe 14 Inch (DN350 mm) is a carbon steel pipe size commonly used in heavy-duty piping systems where higher wall thickness and stronger mechanical performance are required. This pipe size is typically referenced under ANSI/ASME B36.10, which is the standard used for wrought steel pipe dimensions.
For this size, the pipe has an outside diameter (OD) of 355.6 mm, an inside diameter (ID) of 325.42 mm, and a wall thickness of 15.09 mm. The listed pipe weight is 126.72 kg/m, while the weight including water is 209.85 kg/m.
Schedule 60 Pipe 14 Inch (DN350 mm) Dimension Table
| Pipe Size | NPS | DN | Outside Diameter (OD) | Inside Diameter (ID) | Wall Thickness | Weight |
|---|---|---|---|---|---|---|
| Schedule 60 Pipe | 14 Inch | DN350 | 355.6 mm | 325.42 mm | 15.09 mm | 126.72 kg/m |
What Is Schedule 60 Pipe?
Schedule 60 pipe is a heavier wall steel pipe schedule used when a thicker pipe wall is needed compared with lighter schedules such as Schedule 40. In general, a thicker wall can provide improved strength, durability, and pressure-handling capability, depending on material grade, design temperature, and service conditions.
Pipe schedule selection should always be checked against project requirements such as design pressure, temperature, corrosion allowance, piping code, and fabrication method before final use.
14 Inch Schedule 60 Pipe Data
- Standard: ANSI/ASME B36.10
- Pipe Type: Steel Pipe
- NPS: 14 Inch
- DN: DN350
- OD: 355.6 mm
- ID: 325.42 mm
- Wall Thickness: 15.09 mm
- Pipe Weight: 126.72 kg/m
- Weight Including Water: 209.85 kg/m
Common Uses of 14 Inch Schedule 60 Pipe
14 inch Schedule 60 steel pipe may be used in applications where a large internal flow path and thicker wall construction are needed. Typical uses may include:
- Industrial process piping systems
- Water transmission and utility piping
- Oil and gas piping applications
- Power plant and heavy-duty piping systems
- Projects requiring higher wall thickness than lighter schedules
Why DN350 Pipe Dimensions Matter
Many users search for DN350 pipe dimensions to verify pipe routing, structural support loads, transportation limits, fabrication details, and compatibility with fittings or connected equipment. For a 14 inch pipe, accurate dimensional data is especially important because weight, lifting, and installation requirements can increase significantly.
Knowing the correct 14 inch Schedule 60 pipe dimensions also helps engineers, detailers, estimators, buyers, and students compare this pipe size with other schedules when reviewing wall thickness, internal flow area, and total pipe weight.
NPS 14 and DN350 Explained
NPS stands for Nominal Pipe Size in inches, while DN stands for Diameter Nominal in metric designation. For this pipe size:
- NPS 14 = inch-based nominal pipe size
- DN350 = 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 355.6 mm.
Reference for Schedule 60 Pipe 14 Inch
This page provides a quick dimensional reference for engineers, piping designers, students, fabricators, and procurement teams looking for Schedule 60 Pipe 14 Inch (DN350 mm) data in a clear format.
Reference Standard: ANSI/ASME B36.10 steel pipe dimensions.
How to Use This 14 Inch Pipe Reference
The dimensional table is useful when checking whether a pipe section can be coordinated with fittings, flanges, supports, connected equipment, and available routing space. The outside diameter is normally the critical value for external clearances, clamps, supports, and connection alignment. The inside diameter describes the nominal flow passage shown by the source data.
Wall thickness helps distinguish this Schedule 60 entry from lighter or heavier schedule options. It can affect the internal flow passage, pipe mass, fabrication details, and the selection of compatible components. Schedule designation alone does not establish an allowable pressure or confirm suitability for a particular service; the material grade, design conditions, corrosion allowance, applicable piping code, joint details, and project specifications must also be reviewed.
Weight, Water Content, and Support Coordination
The listed pipe weight represents the pipe itself, while the water-inclusive value represents the pipe with water as stated in the source data. These figures should be kept distinct when reviewing support reactions, lifting arrangements, shipping, installation handling, and structural coordination. Actual project loads may require additional consideration of insulation, coatings, valves, fittings, fluid properties, and other attached components.
Dimensional Checks Before Detailing
- Confirm that the selected NPS and DN designations match the project documents.
- Use the stated OD when checking external fit-up, support hardware, and clearance zones.
- Use the stated ID and wall thickness when reviewing flow, connections, and fabrication requirements.
- Check mating fittings and flanges against their applicable dimensional references rather than relying on nominal size alone.
- Confirm the governing material, fabrication, inspection, and piping-code requirements before release for construction.
For broader coordination, this page can be read alongside references covering nominal pipe size, pipe schedule selection, flange dimensions, and CAD/DWG piping details.
Frequently Asked Questions
What is the OD of 14 inch Schedule 60 pipe?
The source data lists an outside diameter of 355.6 mm.
What are the NPS and DN designations?
This pipe is identified as NPS 14 and DN350. NPS is the inch-based nominal designation, while DN is the metric nominal designation.
What is the wall thickness?
The listed wall thickness is 15.09 mm.
What is the listed pipe weight?
The source lists a pipe weight of 126.72 kg/m. It also lists 209.85 kg/m for the pipe including water.
Does Schedule 60 alone determine pressure capacity?
No. Pressure suitability also depends on factors such as material grade, design temperature, design pressure, corrosion allowance, applicable piping code, and fabrication details. These checks should be completed for the specific project.
Which standard is referenced for these dimensions?
The page identifies ANSI/ASME B36.10 as the reference for wrought steel pipe dimensions. Confirm project-specific requirements against the governing specification and applicable standard documents.