# Comparison of ASME B16.34 and API 600 Standards
## Introduction
When it comes to 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 these differences is crucial for engineers, procurement specialists, and quality control professionals working in the oil and gas, power generation, and process industries.
## Scope and Application
The ASME B16.34 standard is a comprehensive document that covers pressure-temperature ratings, dimensions, materials, and testing requirements for valves of various types, including gate, globe, check, ball, and butterfly valves. It applies to valves made of steel, nickel-based alloys, and other alloys.
In contrast, API 600 specifically focuses on bolted bonnet steel gate valves for petroleum and natural gas industries. This standard includes requirements for design, materials, face-to-face dimensions, pressure-temperature ratings, and testing.
## Key Differences
1. Valve Types Covered
ASME B16.34 is more general, covering multiple valve types, while API 600 is specialized for gate valves only.
2. Industry Focus
API 600 is specifically tailored for the petroleum and natural gas industries, whereas ASME B16.34 has broader industrial applications.
3. Design Requirements
API 600 includes more detailed design requirements for gate valves, such as stem design, backseat provisions, and gland follower requirements that aren’t specified in ASME B16.34.
4. Testing Requirements
While both standards require pressure testing, API 600 has more stringent testing requirements specifically for gate valves in hydrocarbon service.
## Material Specifications
Both standards reference material specifications, but API 600 provides more specific guidance on material selection for petroleum applications. ASME B16.34 allows for a wider range of materials suitable for various industries.
## Pressure-Temperature Ratings
The pressure-temperature ratings in ASME B16.34 are more comprehensive, covering a wider range of materials and pressure classes. API 600 adopts these ratings but focuses on the specific needs of gate valves in hydrocarbon service.
## Conclusion
Keyword: two commonly asme b16 34 and api 600
While there is some overlap between ASME B16.34 and API 600, they serve different purposes in the valve industry. ASME B16.34 provides fundamental requirements applicable to various valve types across multiple industries, while API 600 offers specialized requirements for gate valves in petroleum and natural gas applications. Many API 600 valves are designed to meet both standards, ensuring compliance with general industrial requirements while addressing the specific needs of the oil and gas industry.
When selecting valves for a project, engineers must carefully consider which standard(s) apply based on the valve type, service conditions, and industry requirements.