🔷 What are API and ASME standards in industrial valves?

In the industrial valve and piping industry, standards such as API and ASME play a critical role. These international standards ensure that valves are designed, manufactured, tested, and operated safely and consistently.

The three most important standards are: API 602, API 6D, and ASME B16.34.

⚙️ What is API 602?

API 602 is a standard developed by the American Petroleum Institute (API), applicable to small forged steel valves (typically DN15 – DN50).

📌 Key features of API 602:

• Applies to forged steel valves
• Small size, high-pressure applications (Class 150 – Class 2500)
• Includes gate valves, globe valves, and ball valves
• Used in oil & gas, chemical, and steam systems

👉 API 602 is mainly used for compact high-pressure forged steel valves

⚙️ What is API 6D?

API 6D is a standard for pipeline valves used in oil and gas transmission systems.

📌 Key features of API 6D:

• Designed for long-distance pipelines
• Large-size valves (DN50 and above)
• Includes ball valves, gate valves, and check valves
• Requires very high sealing integrity and safety

👉 API 6D is widely used in oil, gas, and pipeline transmission systems

⚙️ What is ASME B16.34?

ASME B16.34 is a standard developed by the American Society of Mechanical Engineers (ASME), defining:

👉 Design, materials, pressure, and temperature ratings for industrial valves

📌 Key features of ASME B16.34:

• Applies to most industrial valve types
• Defines pressure-temperature ratings (Class 150–2500)
• Specifies material requirements and wall thickness
• Includes testing and safety requirements

👉 It is a fundamental standard for global valve design and manufacturing

📊 Quick comparison: API 602 vs API 6D vs ASME B16.34

🏭 Importance of these standards

These API and ASME standards ensure:

• Safe operation of high-pressure systems
• Standardized valve design across manufacturers
• Longer equipment lifespan
• Reduced leakage and system failure risk
• Easy maintenance and replacement

🔥 Why understanding these standards is important

Without understanding API and ASME standards, users may:

• Select the wrong valve type
• Cause system incompatibility
• Increase leakage or failure risk
• Raise maintenance costs

👉 Therefore, engineers and contractors must understand these standards before selecting equipment.

🏁 Conclusion

• API 602: Small forged steel high-pressure valves
• API 6D: Pipeline valves for oil & gas systems
• ASME B16.34: Global valve design standard

👉 These are the three most important standards in the industrial valve industry today.

📞 Contact Information

PHUC MINH ENGINEERING – pm-e.vn supplies industrial valves, flanges, gaskets, and piping equipment according to API and ASME standards.

• 🌐 Website: pm-e.vn
• 📧 Email: info@pm-e.vn
• 📱 Hotline: +84 907 450 506 – +84 902 720 814 – +84 902 800 728