Schedule 60 Pipe 18 Inch (DN450 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 457 mm, an inside diameter (ID) of 418.9 mm, and a wall thickness of 19.05 mm. The listed pipe weight is 205.75 kg/m, while the weight including water is 343.49 kg/m.
Schedule 60 Pipe 18 Inch (DN450 mm) Dimension Table
| Pipe Size | NPS | DN | Outside Diameter (OD) | Inside Diameter (ID) | Wall Thickness | Weight |
|---|---|---|---|---|---|---|
| Schedule 60 Pipe | 18 Inch | DN450 | 457 mm | 418.9 mm | 19.05 mm | 205.75 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.
18 Inch Schedule 60 Pipe Data
- Standard: ANSI/ASME B36.10
- Pipe Type: Steel Pipe
- NPS: 18 Inch
- DN: DN450
- OD: 457 mm
- ID: 418.9 mm
- Wall Thickness: 19.05 mm
- Pipe Weight: 205.75 kg/m
- Weight Including Water: 343.49 kg/m
Common Uses of 18 Inch Schedule 60 Pipe
18 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 DN450 Pipe Dimensions Matter
Many users search for DN450 pipe dimensions to verify pipe routing, structural support loads, transportation limits, fabrication details, and compatibility with fittings or connected equipment. For an 18 inch pipe, accurate dimensional data is especially important because weight, lifting, and installation requirements can increase significantly.
Knowing the correct 18 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 18 and DN450 Explained
NPS stands for Nominal Pipe Size in inches, while DN stands for Diameter Nominal in metric designation. For this pipe size:
- NPS 18 = inch-based nominal pipe size
- DN450 = 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 457 mm.
Reference for Schedule 60 Pipe 18 Inch
This page provides a quick dimensional reference for engineers, piping designers, students, fabricators, and procurement teams looking for Schedule 60 Pipe 18 Inch (DN450 mm) data in a clear format.
Reference Standard: ANSI/ASME B36.10 steel pipe dimensions.