This reference provides a practical starting point for reviewing Schedule STD Pipe 14 Inch (DN350) dimensions and weight. Use the data table for dimensional checks, then confirm the pipe specification, material, manufacturing requirements, and project design conditions before procurement or fabrication.
For drafting and coordination, the accompanying CAD resource can help users compare the pipe envelope with connected fittings, flanges, supports, and layout requirements. Related references for pipe schedules, flange dimensions, and pipe fittings can provide useful context when developing a complete piping arrangement.
Schedule STD Pipe 14 Inch (DN350) is a steel pipe size commonly used in industrial and utility piping systems where standard dimensions, structural reliability, and dependable flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 355.6 mm, an inside diameter of 336.54 mm, a wall thickness of 9.53 mm, and a pipe weight of 81.33 kg/m.
14 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 14 Schedule STD pipe, which corresponds to DN350 in metric designation.
- Pipe Size: NPS 14 Inch
- DN Size: DN350
- Outside Diameter (OD): 355.6 mm
- Inside Diameter (ID): 336.54 mm
- Wall Thickness: 9.53 mm
- Pipe Weight: 81.33 kg/m
- Pipe Weight Including Water: 170.23 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 14 Inch (DN350) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 14 Inch | 350 | 355.6 | 336.54 | 9.53 | 81.33 |
What Is Schedule STD Pipe?
Schedule STD means Standard Weight in the IPS pipe system and is commonly referenced for carbon steel and steel pipe dimensions under ASME B36.10. In practical piping work, Schedule STD is used as a standard wall thickness designation for many nominal pipe sizes. It helps engineers, fabricators, and buyers confirm dimensional compatibility, estimate weight, and coordinate with fittings, flanges, supports, and structural loads.
Common Uses of 14 Inch Schedule STD Pipe
14 inch Schedule STD pipe is commonly used in industrial and utility piping systems where good flow capacity and standard steel pipe dimensions are required. This size is often selected for water, cooling, transmission, and plant services where reliable dimensional data is important for design, fabrication, and construction.
- Water transmission lines for plant and utility service
- Cooling water systems in industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in process plants
- Pump suction and discharge lines where larger diameter piping is needed
- Municipal and public works projects requiring steel pipe sizes
- Replacement and upgrade projects where standard pipe dimensions are required
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, handling requirements, and installation planning. Final pipe selection should always be verified against project pressure, temperature, fluid type, corrosion allowance, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for support design, material take-off, transport planning, lifting studies, welding preparation, and installation work. For a pipe as large as 14 inch DN350, accurate weight data is useful for crane selection, support design, and logistics planning. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 14 and DN350 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. The current page identifies this pipe as NPS 14 and DN350, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 14 Inch (DN350) is listed on the current page with 355.6 mm OD, 336.54 mm ID, 9.53 mm wall thickness, and 81.33 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for piping systems and project coordination.
How to Use This Pipe Reference
The listed outside diameter is the primary envelope dimension for layout, supports, clamps, sleeves, and connections. The inside diameter is more relevant to flow-area review and hydraulic calculations. Wall thickness supports fabrication, weld-end preparation, and mass estimation, while the listed weight is useful for material takeoffs, handling, and support-load coordination.
These dimensions should be checked alongside the applicable piping specification. A schedule designation identifies a dimensional wall category, but it does not by itself establish allowable pressure, temperature limits, corrosion resistance, or suitability for a particular service. Those decisions require review of the material grade, fluid, design conditions, joining method, corrosion allowance, and governing project requirements.
Coordination With Related Piping Components
When using this page for a piping model or drawing, compare the pipe dimensions with the selected flanges, butt-weld fittings, reducers, valves, and pipe supports. The nominal size designation helps organize the reference, but connection details and component standards must still be verified individually.
The downloadable DWG is useful for preliminary drafting and coordination. Before issuing a fabrication or construction drawing, confirm units, connection details, centerlines, clearances, material callouts, and the project’s approved component data.
Checks to Make Before Procurement
- Confirm that the nominal size and schedule match the piping specification.
- Check the required material grade, test requirements, coating, and corrosion protection.
- Review pressure, temperature, fluid-service, and joining requirements with the responsible engineer.
- Use the listed mass data for estimating and coordination, then verify the supplier’s documentation for the ordered product.
- Coordinate the pipe with fittings, flanges, supports, insulation, access space, and transport or lifting plans.
Frequently Asked Questions
What does Schedule STD mean for this pipe?
Schedule STD means Standard Weight in the inch-based IPS pipe system. It is a dimensional designation used to coordinate pipe size and wall thickness; it is not a complete material or pressure-service specification.
Are NPS 14 and DN350 the same pipe designation?
This page identifies the pipe as NPS 14 and DN350. NPS is the nominal pipe size expressed in inch-based terminology, while DN is the metric nominal designation used in many drawings, specifications, and procurement documents.
Which dimensions are most important for layout?
The outside diameter is important for the physical envelope, supports, sleeves, and connection coordination. The inside diameter supports flow-area review, while wall thickness and weight are important for fabrication, handling, and structural coordination.
Does the schedule alone confirm whether the pipe is suitable?
No. Final selection also depends on material, design pressure and temperature, fluid service, corrosion allowance, manufacturing requirements, joining details, and the governing project specification. An engineer or qualified piping specialist should verify the complete selection.
Can the DWG file be used directly for fabrication?
The DWG is best treated as a drafting and coordination reference. Check its units, geometry, connection details, and project requirements against approved supplier and engineering documentation before using it for fabrication or construction.