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What is the difference between API 600 and ASME B16-34

Dec 22, 2025 Leave a message

What is the difference between API 600 and ASME B16.34?

 

API 600: Specifically designed for bolted-bonded steel gate valves used in the oil, gas, and related industries. It emphasizes the gate valve specificity and is suitable for applications in refining, chemical, and other industries where high gate valve performance is required.

ASME B16.34: Has a broader scope, covering various types of valves with flanged, threaded, and welded connections, including gate valves, globe valves, check valves, and ball valves. It is used in power plants, chemical processes, water supply and drainage systems across multiple industries.

 

1. Standard Nature and Scope

API 600:

Applicable to: Steel gate valves with bolted bonnets for use in the oil and gas industry.

Core Content: Requirements for the entire design, manufacturing, and testing process, emphasizing low torque, excellent sealing, low noise, and high safety and stability.

ASME B16.34:

Applicable to: Valves with flanged, threaded, and welded connections, including gate valves, globe valves, check valves, butterfly valves, plug valves, etc.

Core Content: Specifies the pressure-temperature ratings, materials, design, and manufacturing requirements for valves, applicable to various industrial scenarios.

 

2. Differences in Core Content

API 600:

Design Specifications: Emphasizes versatility, applicable to various industrial scenarios.

Manufacturing Requirements: Provides clear requirements for the manufacturing processes and quality control of key components such as the valve body, bonnet, and stem.

Inspection and Testing: Specifies the inspection and testing requirements for valves to ensure their performance and safety.

ASME B16.34:

Design Specification: Specifies the structural, dimensional, and material requirements for valves with flanged, threaded, and welded connections.

Manufacturing Requirements: Includes manufacturing processes and quality control for key components such as the valve body, bonnet, and stem.

Inspection and Testing: Specifies the inspection and testing requirements for valves to ensure their performance and safety.

 

3. Applications

API 600: Applicable to the selection of steel gate valves in industries such as oil and gas.

ASME B16.34: Applicable to the selection of valves in industries such as oil and gas, chemical, and power generation.

 

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