How may top angle joints be attached to the shell?

• A. With single welded overlap joints
• B. Using a double welded lap joint
• C. With bolted connections only
• D. With sleeve joints

Answer: (B)

The attachment of top angle joints to the shell in welded tanks is indeed most appropriately done using a double welded lap joint. This method involves creating a strong, secure connection by welding on both sides of the joint, which enhances the overall strength and integrity of the connection. This is particularly important in tank construction, where the joints must be able to withstand various pressures and environmental factors.

Double welded lap joints provide better load distribution and can help mitigate potential weaknesses that may arise from single-sided welding, which can be more susceptible to failure. Additionally, this type of joint is less prone to defects and can improve the longevity of the tank structure.

Other methods, such as using single welded overlap joints or bolted connections, may not provide the same level of structural integrity required for the demanding conditions under which storage tanks operate. Sleeve joints, while useful in certain applications, do not facilitate the same kind of reliable connection as a double welded lap joint in this scenario. Therefore, the effectiveness and robustness of double welded lap joints make them the preferred choice for attaching top angle joints to the shell of the tank.