# Comparison of ASME B16.34 and API 600 Standards
## Introduction
When it comes to industrial valves, two of the most 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 industrial valves.
## Overview of ASME B16.34
Scope and Application
The ASME B16.34 standard, titled “Valves – Flanged, Threaded, and Welding End,” is published by the American Society of Mechanical Engineers. This standard covers:
- Pressure-temperature ratings
- Materials
- Dimensions
- Testing requirements
- Marking requirements
It applies to a wide range of valve types including gate, globe, check, ball, and butterfly valves for flanged, threaded, and welding end connections.
Key Features
ASME B16.34 provides:
- Pressure-temperature ratings for various materials
- Wall thickness requirements
- Minimum bore sizes
- General requirements for valve design
## Overview of API 600
Scope and Application
API 600, titled “Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries,” is published by the American Petroleum Institute. This standard specifically focuses on:
- Bolted bonnet steel gate valves
- Valves for refinery and pipeline service
- Heavy-duty applications in the oil and gas industry
Key Features
API 600 includes requirements for:
- Design and construction
- Materials
- Face-to-face dimensions
- Pressure testing
- Inspection and quality control
Keyword: two commonly asme b16 34 and api 600
## Key Differences Between ASME B16.34 and API 600
1. Scope and Valve Types
ASME B16.34 covers multiple valve types, while API 600 is specifically for bolted bonnet steel gate valves.
2. Industry Focus
ASME B16.34 is more general and used across various industries, whereas API 600 is specifically tailored for the petroleum and natural gas industries.
3. Design Requirements
API 600 has more stringent design requirements for gate valves, including:
- Stem design
- Backseat requirements
- Gland plate design
- Specific requirements for pressure-containing parts
4. Testing Requirements
While both standards require pressure testing, API 600 typically has more rigorous testing protocols specifically for gate valves in harsh service conditions.
5. Material Requirements
API 600 provides more specific material requirements for components in oil and gas service, including requirements for:
- Stem material
- Seat materials
- Corrosion resistance
## When to Use Each Standard
ASME B16.34 Applications