Schedule 20 pipe 28 inch (DN700) is a large-diameter 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 28 Schedule 20 pipe based on ASME B36.10.
28 Inch Schedule 20 Pipe Dimensions
- Nominal Pipe Size (NPS): 28 inch
- Diameter Nominal (DN): DN700
- Outside Diameter (OD): 711 mm
- Wall Thickness: 12.7 mm
- Inside Diameter (ID): 685.6 mm
- Pipe Weight: 218.71 kg/m
- Pipe Weight Filled With Water: 587.69 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 20 Pipe 28 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 28 inch | 700 | 711 | 12.7 | 685.6 | 218.71 |
What Does Schedule 20 Mean?
Schedule 20 refers to a lighter wall thickness series than heavier schedules such as Schedule 40, Schedule 80, or Schedule 160. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes according to the schedule. A lighter wall gives a larger inside diameter and lower pipe weight.
Typical Uses of 28 Inch Schedule 20 Pipe
NPS 28 Schedule 20 pipe is commonly referenced in large-diameter industrial piping systems, utility lines, water-related systems, plant layout drawings, and fabrication work where a large flow area is needed with lower wall thickness than heavier pipe schedules.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 28 inch pipe, total line weight can still become very high even with a lighter schedule, so accurate data is essential for engineering work.
28 Inch Schedule 20 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 28 inch Schedule 20 pipe?
The outside diameter is 711 mm.
What is the wall thickness of DN700 Schedule 20 pipe?
The wall thickness is 12.7 mm.
What is the inside diameter of NPS 28 Schedule 20 pipe?
The inside diameter is 685.6 mm.
How much does 28 inch Schedule 20 pipe weigh?
The approximate weight is 218.71 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 20 pipe 28 inch (DN700) has an outside diameter of 711 mm, wall thickness of 12.7 mm, inside diameter of 685.6 mm, and a weight of 218.71 kg/m. It is a useful reference for piping design, fabrication, estimating, and industrial engineering work.