Understanding schedule 10 pipes is essential for engineers, contractors, and designers who need reliable dimensional data and wall thickness specifications. This reference focuses on standard dimensions, unit weights, and pipe thickness in millimeters for schedule 10 piping across common sizes.
Use the table below to compare key metrics quickly and determine which pipe meets your pressure, support, and installation requirements.
| Nominal Size (DN) | Outside Diameter (mm) | Schedule 10 Wall Thickness (mm) | Approx. Unit Weight (kg/m) |
|---|---|---|---|
| DN10 (1/2") | 21.3 | 2.11 | 2.8 |
| DN15 (3/4") | 26.7 | 2.11 | 3.5 |
| DN20 (1") | 33.4 | 2.11 | 4.5 |
| DN25 (11/4") | 42.2 | 2.75 | 6.2 |
| DN32 (11/4") | 42.2 | 2.75 | 6.8 |
| DN40 (11/2") | 48.3 | 2.75 | 8.1 |
| DN50 (2") | 60.3 | 3.40 | 11.9 |
| DN65 (21/2") | 73.0 | 3.40 | 16.1 |
| DN80 (3") | 88.93.40 | 21.7 |
Schedule 10 Pipe Outer Diameter Standards
For schedule 10 pipes, the outside diameter aligns with nominal pipe size (NPS) standards defined by ANSI/ASME B36.10M. Each nominal size corresponds to a specific outer diameter in millimeters, ensuring compatibility across fittings and valves. Accurate OD measurement is critical for alignment, support spacing, and flow calculations in process design.
Schedule 10 Pipe Wall Thickness by Size
Wall thickness for schedule 10 is relatively thin, making it suitable for low-to-moderate pressure applications where weight and cost are priorities. The values in millimeters remain consistent across a range of nominal sizes, with slight increases at larger diameters to maintain structural integrity.
Weight Per Meter and Installation Planning
Unit weight in kilograms per meter influences handling, lifting plans, and hanger spacing. Lighter pipes reduce shipping and labor costs but may require additional support to manage movement and stress. Use the table to estimate total weight for spools and to size structural components accurately.
Pressure Rating and Application Scope
Schedule 10 pipes are typically used in low-pressure utility lines such as water, air, and low-temperature services. The pressure rating drops as operating temperature rises, so engineers must verify conditions against standards like ASME B31.3 and B31.1. Confirm that OD, wall thickness, and material certifications match project specifications before installation.
Key Takeaways for Specification and Procurement
- Match nominal pipe size to outside diameter and wall thickness from recognized standards.
- Use unit weight per meter to plan logistics, handling equipment, and hanger design.
- Verify pressure and temperature ratings against applicable process and safety codes.
- Select schedule 10 for low-pressure utility services where cost and weight are priorities.
- Confirm material certifications and dimensional inspections per project specifications.
FAQ
Reader questions
What is the typical outer diameter for a DN50 schedule 10 pipe?
The outside diameter is 60.3 mm, which corresponds to the nominal 2-inch size in the ANSI/ASME standard dimension table.
How does wall thickness vary across different nominal sizes for schedule 10?
Wall thickness is commonly 2.11 mm for smaller sizes up to DN32, increasing to 2.75 mm for DN40 and DN50, and 3.40 mm for DN65 and DN80, as shown in the reference table.
Can schedule 10 pipes be used for compressed air systems? Yes, schedule 10 pipes are suitable for low-pressure compressed air systems, provided the design pressure and temperature remain within limits specified in relevant pressure piping codes. What is the approximate weight difference between DN50 and DN80 schedule 10 pipes?
The unit weight increases from approximately 11.9 kg/m for DN50 to 21.7 kg/m for DN80, which affects handling, transport costs, and support structure design.