Schedule 10 pipe 12 inch (DN300) is a standard steel pipe size commonly used in piping design, fabrication, drafting, and estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 12 Schedule 10 pipe based on ASME B36.10.
12 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 12 inch
- Diameter Nominal (DN): DN300
- Outside Diameter (OD): 323.9 mm
- Wall Thickness: 4.57 mm
- Inside Diameter (ID): 314.76 mm
- Pipe Weight: 35.98 kg/m
- Pipe Weight Filled With Water: 113.7 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 12 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 12 inch | 300 | 323.9 | 4.57 | 314.76 | 35.98 |
What Does Schedule 10 Mean?
Schedule 10 refers to the wall thickness series of the pipe. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes depending on the schedule. A thicker wall generally increases pipe weight and reduces the inside diameter.
Typical Uses of 12 Inch Schedule 10 Pipe
NPS 12 Schedule 10 pipe is commonly used in water transfer lines, utility systems, low-pressure process piping, drainage applications, and general plant layout or fabrication work where a lighter wall thickness is suitable. It is also a useful reference size for piping design and material estimation.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, support design, structural loading, fabrication estimates, and lifting calculations. Even for medium-size piping systems, total installed weight can affect support spacing, handling methods, and project cost.
12 Inch Schedule 10 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimension data using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material grade, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 12 inch Schedule 10 pipe?
The outside diameter is 323.9 mm.
What is the wall thickness of DN300 Schedule 10 pipe?
The wall thickness is 4.57 mm.
What is the inside diameter of NPS 12 Schedule 10 pipe?
The inside diameter is 314.76 mm.
How much does 12 inch Schedule 10 pipe weigh?
The approximate weight is 35.98 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 10 pipe 12 inch (DN300) has an outside diameter of 323.9 mm, wall thickness of 4.57 mm, inside diameter of 314.76 mm, and a weight of 35.98 kg/m. It is a useful reference for piping design, drafting, estimating, and fabrication work.