Use this page as a working reference when checking 14 inch Schedule XS pipe dimensions for piping layouts, fabrication drawings, material takeoffs, and installation planning. The existing table provides the authoritative local values for outside diameter, inside diameter, wall thickness, and weight.
Because nominal pipe size is not the same as measured outside diameter, designers and drafters should confirm the listed dimensions before preparing connections, supports, spool drawings, or transport plans. For related sizing work, this page can be reviewed alongside a pipe schedule chart, NPS-to-DN reference, and steel pipe weight guide.
Schedule XS Pipe 14 Inch (DN350) is a steel pipe size commonly used in industrial piping systems, utility lines, water transmission projects, plant construction, and fabrication work. This page provides a practical reference for the main dimensions and weight of 14 inch XS pipe based on ANSI/ASME B36.10.
For piping engineers, CAD designers, estimators, fabrication teams, and site supervisors, accurate pipe size data is important for layout work, material takeoff, support design, transport planning, and installation checks. This guide presents the essential dimensions in a cleaner format that adds more value than a simple size table.
14 Inch Schedule XS Pipe Dimensions
- Pipe Size: 14 Inch
- Nominal Diameter: DN350
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 355.6 mm
- Inside Diameter (ID): 330.2 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 107.4 kg/m
- Pipe Weight Including Water: 192.99 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 14 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 14″ | 350 | 355.6 | 330.2 | 12.7 | 107.4 |
What Does Schedule XS Mean?
Schedule XS stands for Extra Strong. It is a pipe wall designation used in steel pipe standards. The selected schedule affects the wall thickness, which directly affects the inside diameter, pipe weight, fabrication requirements, and support loading.
For a size such as 14 inch DN350 pipe, wall thickness remains important because it affects total pipe weight, handling requirements, support loads, and installation planning in real projects.
Why 14 Inch DN350 Pipe Dimensions Matter
Knowing the exact dimensions of 14 inch Schedule XS pipe is useful for several engineering and construction tasks:
- Fabrication: OD and wall thickness are needed for cutting, beveling, welding, and fit-up work.
- Support Design: Pipe weight per meter helps engineers check support spacing and structural loads.
- Flow Review: ID is useful for estimating internal flow area and hydraulic performance.
- Transport and Lifting: Accurate weight data supports safer handling and planning.
- Schedule Comparison: Engineers often compare XS with STD, Sch 40, Sch 60, or Sch 80 during design review.
Typical Applications of 14 Inch Schedule XS Pipe
This pipe size may be used in:
- Industrial process piping
- Water transmission systems
- Power and utility projects
- Plant piping works
- Infrastructure construction
- Custom steel fabrication and spool projects
Engineering Notes
NPS means Nominal Pipe Size, while DN means Diameter Nominal. Although this pipe is called 14 inch, the actual outside diameter is 355.6 mm according to the standard. The inside diameter changes with the pipe schedule because wall thickness changes from one schedule to another.
That means if you compare the same 14 inch pipe in a different schedule, the OD usually stays the same, while the ID, wall thickness, and pipe weight will change.
Reference
The dimension data on this page is based on ANSI/ASME B36.10, which is widely used for steel pipe dimensions in industrial applications.
How to Use the 14 Inch XS Pipe Data
The dimensions on this page serve different purposes during engineering and construction. The outside diameter is commonly used for layout clearances, clamps, sleeves, fittings, and external connections. The inside diameter is more relevant to flow-area reviews and internal clearance checks. Wall thickness is important for fabrication, welding preparation, corrosion allowance reviews, and dimensional comparison with other schedules.
The listed pipe weight supports material estimating, lifting studies, transport planning, and preliminary support-load checks. The weight including water is useful when considering the operating load of a water-filled line, but the complete design load may also include insulation, valves, flanges, fittings, contents with a different density, and other attached items.
Drafting and Fabrication Checks
- Use the outside diameter for external layout and connection-clearance checks.
- Use the inside diameter when reviewing internal passage and hydraulic assumptions.
- Confirm wall thickness before detailing bevels, weld preparations, branches, and cut lengths.
- Coordinate the pipe dimensions with the selected fittings, flanges, valves, and support components.
- Check the project specification, material documentation, and applicable fabrication requirements before release for construction.
When comparing this pipe with another 14 inch schedule, the nominal size remains the same, while wall thickness, inside diameter, and weight can differ. A useful design-review workflow is to compare the schedule table first, then verify how the change affects fittings, supports, clearances, and the project material takeoff. Related references such as pipe fittings dimensions, flange dimensions, and pipe support design guidance can help complete that review.
Important Use Limitation
Dimensional data alone does not establish pressure capability, allowable stress, corrosion suitability, weld procedure requirements, or structural adequacy. Those decisions require the applicable project specifications, material grade and certification, design conditions, joining details, and review by a qualified engineer. Treat the values on this page as a dimensional reference and verify them against the governing documents for the project.
Frequently Asked Questions
What does XS mean for 14 inch pipe?
XS means Extra Strong. It identifies a pipe wall designation. For the 14 inch size, that wall designation affects the inside diameter, pipe weight, fabrication details, and support loading.
Are 14 inch and DN350 the same pipe size?
They are the nominal size designations used for this reference. The page lists the corresponding NPS and DN values together, while the actual outside diameter is given separately in the dimension data.
Why is the inside diameter important?
The inside diameter helps with internal clearance and flow-area reviews. It changes when wall thickness changes, even when the nominal pipe size and outside diameter remain the same.
What is the difference between pipe weight and weight including water?
Pipe weight refers to the pipe itself. Weight including water represents the pipe with water inside it and is useful for preliminary operating-load and support discussions. Other components and contents may need to be included in a complete load assessment.
Can this table be used to select a pipe for a project?
It can be used as a dimensional reference, but final selection also requires review of the project design conditions, material requirements, applicable specifications, joining method, corrosion considerations, and engineering calculations.