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Steel Pipe Size Catalogue SCH10/SCH40/SCH80 | ASME B36.10 Standard Chart

15/04/2026

Steel Pipe Size Catalogue SCH10 / SCH40 / SCH80 According to ASME B36.10 Standard

In industrial piping systems, selecting the correct steel pipe size and wall thickness is essential to ensure safety and performance.

The most widely used standards are SCH10, SCH40, and SCH80, defined under the ASME B36.10 standard.

1. What Does SCH Mean in Steel Pipes?

SCH (Schedule) refers to the wall thickness of steel pipes, not the outer diameter.

👉 Higher SCH means thicker pipe wall → higher pressure resistance.

2. Common SCH Types

🔹 SCH10

Thin wall thickness
Low pressure applications
Used in water systems and ventilation

🔹 SCH40

Most commonly used standard
Balanced strength and cost
Used in oil & gas and industrial systems

🔹 SCH80

Thick wall pipe
High pressure resistance
Used in steam and chemical systems

3. Steel Pipe Size Catalogue (Overview)

NPS (inch)	DN	SCH10 (mm)	SCH40 (mm)	SCH80 (mm)
1/2”	DN15	2.77	2.77	3.73
1”	DN25	2.77	3.38	4.55
2”	DN50	3.91	3.91	5.54
4”	DN100	6.02	6.02	8.56
6”	DN150	7.11	7.11	10.97

👉 Note: Dimensions may vary slightly depending on ASME B36.10 standard.

4. What is ASME B36.10 Standard?

ASME B36.10 is an international standard that defines:

Steel pipe diameters (NPS / DN)
Wall thickness (SCH)
Carbon steel and alloy steel pipes

5. Applications of SCH Steel Pipes

Oil & gas pipelines
Chemical plants
Steam systems
Power plants
High-pressure industrial pipelines

6. How to Select the Correct SCH

SCH10 → low-pressure systems
SCH40 → standard industrial systems
SCH80 → high-pressure and high-temperature systems

👉 Selection depends on pressure and temperature conditions.

7. Advantages of SCH Steel Pipes

High durability
Standardized dimensions
Suitable for multiple industries
Easy installation and replacement
Globally recognized standard

8. Important Notes When Using SCH Pipes

Do not confuse SCH with pipe diameter
Always follow ASME standards
Select correct material for environment
Perform proper pressure calculation before selection

9. Reliable Supplier of Steel Pipes & Industrial Equipment

For technical consultation or quotation, contact:

Phuc Minh Engineering Co., Ltd
🌐 Website: pm-e.vn
📧 Email: info@pm-e.vn
📱 Hotline: +84 907 450 506 – +84 902 720 814 – +84 979 737 351

👉 We supply:

SCH10 / SCH40 / SCH80 steel pipes
Valves, flanges, and fittings
Full CO-CQ documentation
Project technical support

CONCLUSION

The SCH10, SCH40, SCH80 steel pipe size catalogue based on ASME B36.10 helps engineers select the correct pipe type, ensuring safety and efficiency in industrial piping systems.

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