Comparison of ASME B16.34 and API 600 Standards

# 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. This article explores the key differences between these two important standards in the valve industry.

## Scope and Application

ASME B16.34

The ASME B16.34 standard covers pressure-temperature ratings, dimensions, tolerances, materials, and testing requirements for valves of various types, including gate, globe, check, ball, and butterfly valves. It applies to valves made from forged or cast materials and is widely used across multiple industries.

API 600

API 600 specifically focuses on bolted bonnet steel gate valves for petroleum and natural gas industries. It provides more detailed requirements for design, materials, face-to-face dimensions, testing, and inspection of these specialized valves.

## Key Differences

1. Valve Types Covered

ASME B16.34 is more comprehensive, covering multiple valve types, while API 600 is specialized for bolted bonnet steel gate valves only.

2. Industry Focus

API 600 is specifically designed for the oil and gas industry, whereas ASME B16.34 has broader industrial applications.

3. Testing Requirements

API 600 includes more stringent testing requirements, particularly for high-pressure applications in the petroleum industry.

4. Material Specifications

While both standards address materials, API 600 provides more detailed specifications for materials suitable for harsh oil and gas environments.

## When to Use Each Standard

Choosing between ASME B16.34 and API 600 depends on your specific application:

• Use ASME B16.34 for general industrial valve applications across various valve types
• Use API 600 when specifying bolted bonnet steel gate valves for petroleum or natural gas service

## Conclusion

Both ASME B16.34 and API 600 play crucial roles in valve standardization. While ASME B16.34 provides broader coverage for multiple valve types, API 600 offers specialized requirements for gate valves in the oil and gas industry. Understanding these differences helps engineers and procurement specialists select the appropriate standard for their specific applications.