# Comparison of ASME B16.34 and API 600 Standards
Keyword: two commonly asme b16 34 and api 600
Introduction
In the world of industrial valves, two commonly referenced standards are ASME B16.34 and API 600. While both standards address valve design and manufacturing, they serve different purposes and have distinct requirements. Understanding the differences between these standards is crucial for engineers, procurement specialists, and quality control professionals working with valves in various industries.
Scope and Application
ASME B16.34 is a comprehensive standard that covers the design, materials, dimensions, testing, and inspection requirements for valves of various types, including gate, globe, check, ball, and butterfly valves. It applies to valves made from materials such as carbon steel, alloy steel, stainless steel, and nickel alloys.
API 600, on the other hand, is specifically focused on bolted bonnet steel gate valves for petroleum and natural gas industries. It provides more detailed requirements for gate valve design, construction, and testing, particularly for applications in refineries and related facilities.
Key Differences
1. Valve Types Covered
ASME B16.34 covers multiple valve types, while API 600 is exclusively for gate valves. This makes B16.34 more versatile but less specialized than API 600 for gate valve applications.
2. Pressure-Temperature Ratings
Both standards provide pressure-temperature ratings, but API 600 includes additional requirements for severe service conditions commonly encountered in oil and gas applications.
3. Material Requirements
API 600 has more stringent material specifications, particularly for components like stems and wedges, to ensure reliability in harsh operating environments.
4. Testing Requirements
While both standards require pressure testing, API 600 includes more comprehensive testing protocols, including optional tests like cryogenic testing for low-temperature applications.
When to Use Each Standard
Choose ASME B16.34 when you need a general standard applicable to various valve types across different industries. Opt for API 600 when specifically dealing with gate valves in petroleum, petrochemical, or natural gas service where more rigorous requirements are necessary.
Conclusion
Both ASME B16.34 and API 600 play important roles in valve manufacturing and specification. The choice between them depends on the specific application, valve type, and industry requirements. Many high-performance valves actually comply with both standards to meet the most demanding applications.
