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PN to ANSI Class Conversion Table | Pressure Rating Guide for Industrial Valves

15/04/2026

PN to ANSI Class Conversion Table in Industrial Valves

In the piping and industrial valve industry, understanding and converting between pressure standards is essential for selecting the right equipment. The two most widely used standards today are PN (Pressure Nominal) and ANSI Class.

So, how do you convert PN to ANSI Class? Let’s explore the details with Phuc Minh Engineering Co., Ltd in this article.

PN to ANSI Class Conversion Table in Industrial Valves

What is PN?

PN (Pressure Nominal) is a nominal pressure rating defined by European standards (DIN/EN). It indicates the pressure capacity of equipment at a reference temperature (typically 20°C).

Common PN ratings:

PN6
PN10
PN16
PN25
PN40
PN63
PN100

What is ANSI Class?

ANSI Class is a pressure rating system used in American standards such as ASME B16.5 and B16.34.

Common ANSI Classes:

Class 150
Class 300
Class 600
Class 900
Class 1500
Class 2500

PN to ANSI Class Conversion Table

Below is a commonly used approximate conversion table:

PN (bar)	ANSI Class (lb)
PN6	~ Class 150
PN10	~ Class 150
PN16	~ Class 150
PN25	~ Class 300
PN40	~ Class 300
PN63	~ Class 600
PN100	~ Class 600
PN160	~ Class 900
PN250	~ Class 1500
PN420	~ Class 2500

👉 Important Note: This conversion is for reference only. Actual pressure ratings may vary depending on:

Operating temperature
Material of construction
Specific design standards

Why Convert PN to ANSI Class?

In real-world applications, equipment often follows different standards:

European valves: use PN
American or Japanese valves: use ANSI Class

Conversion helps to:

Select the correct replacement valve
Ensure system safety
Avoid design and installation errors

PN vs ANSI Class Comparison

Criteria	PN	ANSI Class
Standard System	European (DIN/EN)	American (ASME/ANSI)
Unit	bar	lb (psi)
Calculation Method	Fixed nominal pressure	Depends on temperature & material
Accuracy	Relative	More precise under conditions

Practical Applications

Selecting appropriate industrial valves
Designing piping systems according to international standards
Replacing equipment across different standards
Engineering consulting for oil & gas, power plants, and chemical industries

Important Considerations

Do not assume exact 1:1 conversion
Always check technical datasheets
Follow the original system standard whenever possible
Consult engineers or suppliers when needed

Reliable Industrial Valve Supplier

If you need consultation on selecting valves based on PN or ANSI Class, please 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 provide:

Industrial valves with multiple standards (DIN, ANSI, JIS)
Genuine products with full CO & CQ documentation
Professional technical consultation
Competitive pricing for projects

Conclusion

Understanding the PN to ANSI Class conversion table helps you select the right equipment, ensure safety, and optimize costs. However, since this is an approximate conversion, always verify detailed technical specifications before application.

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