What is API 620 standard ?

Title: A Comprehensive Guide to API 620 Standard for LNG Storage

The demand for efficient and reliable storage and handling of liquefied natural gas (LNG) has increased significantly in recent years, driven by the increasing number of natural gas-based power plants and the growing importance of energy security. In response to this need, the American Petroleum Institute (API) has developed API 620, a widely recognized standard for designing and constructing large steel tanks used for storing LNG at atmospheric pressure or higher.

API 620 Standard: Key Requirements

API 620 standard outlines several key requirements that must be met during the design and construction of large, welded, low-pressure storage tanks. These include:

Material Selection: The standard specifies the materials that can be used, ensuring they meet the necessary strength and corrosion resistance characteristics required for LNG storage.

Geometric Parameters: The standard defines the allowed geometric parameters for the storage tanks, including the tank size, shape, and foundation requirements.

Internal Structure: The standard specifies the internal structure of the storage tanks, including the number and location of the LNG storage cells, the size and shape of the cells, and the type of insulation used.

Access and Maintenance: The standard outlines the access and maintenance requirements for the storage tanks, including the requirements for access doors, hatches, and service ports.

Safety and Integrity: The standard specifies the safety and integrity requirements for the storage tanks, including the requirements for fire protection, emergency shutdown systems, and pressure relief mechanisms.

Conclusion:

In conclusion, API 620 standard is a crucial guide for designing and constructing large, welded, low-pressure storage tanks used for storing LNG. By following the key requirements outlined in this article, engineers and contractors can ensure that their storage tanks meet the necessary strength, corrosion resistance, and safety specifications, ensuring reliable and efficient storage and handling of LNG.