API Std 620 is a technical standard for the design and construction of large, welded, low-pressure storage tanks, presented here as the 12th edition of the Chinese-language version. For buyers comparing engineering references, it provides a recognized basis for consistent tank project work where low-pressure storage systems require clear technical alignment. API Std 620 is often relevant to teams that need a dependable document for project review, fabrication coordination, and quality-focused decision-making. It is especially useful when a company wants a common reference for storage tank work that supports safety, reliability, and specification control.

What is API Std 620?

API Std 620 is an API standard that serves as a recognized technical benchmark for the design and construction of large, welded, low-pressure storage tanks. Based on its title, it is intended to support engineering consistency for tank projects where controlled pressure service and welded construction are part of the design basis. This makes it a practical reference for organizations that need a common standard for technical review, documentation, and project specification work. The standard helps align expectations across engineering, fabrication, and quality-related functions.

Where is API Std 620 used?

API Std 620 is commonly used in storage tank projects within oil and gas, refining, petrochemical, terminal, and process facility environments where large welded low-pressure tanks are specified or reviewed. It may support engineering teams during design checks, procurement during specification review, and QA/QC or inspection groups during fabrication and acceptance planning. Operations and maintenance teams may also use it as a reference when coordinating long-term tank integrity and asset documentation. In practice, it helps keep project and field teams working from the same technical basis.

Why is API Std 620 important?

API Std 620 matters because it helps create technical consistency for a specialized class of storage tanks, reducing ambiguity during procurement, engineering review, and fabrication planning. For buyers and internal users, that can support clearer specifications, smoother cross-team communication, and more reliable quality control. It is also valuable as a shared reference for inspection planning, maintenance coordination, and documentation control, especially where welded low-pressure storage tanks are part of critical infrastructure. API Std 620 can therefore help reduce project risk and support more dependable lifecycle decisions.

• Large, welded, low-pressure storage tanks
• Engineering and design reference
• Fabrication and construction alignment
• QA/QC and inspection support
• Procurement and specification review
• Operations, maintenance, and asset documentation