Why is grounding and bonding important in API 650 tanks?

• A. To improve insulation properties
• B. To prevent static electricity hazards
• C. To enhance the tank's load-bearing capacity
• D. To facilitate easier repairs

Answer: (B)

Grounding and bonding are critical practices in the context of API 650 tanks because they play a vital role in preventing static electricity hazards. In the operation of tanks used for storing flammable liquids, static electricity can accumulate due to the motion of liquids or other operational activities. This accumulation can generate sparks, which might ignite flammable vapors or liquids, leading to dangerous explosions or fires.

By grounding the tank, electrical charges can be safely dissipated to the earth, effectively reducing the risk of static buildup. Bonding ensures that all metallic components of the tank and associated piping systems are electrically connected, minimizing potential differences in voltage that could lead to sparking. Therefore, the primary purpose of grounding and bonding is to ensure safety in the operation of storage tanks, particularly in environments where flammable materials are present.

Improving insulation properties does not relate to the safety benefits provided through grounding and bonding, nor does it pertain to enhancing load-bearing capacity or making repairs easier. Those functions are of a different nature and do not address the critical need to manage static electricity in storage tank operations.