Which dimensions would be acceptable for lap-welded patch plate repair according to API 653?

Which dimensions would be acceptable for lap-welded patch plate repair according to API 653?

• A. Four inches by five inches
• B. Eight inches by two inches
• C. Two inches by two inches
• D. Six inches by three inches

Answer: (A)

The correct answer pertains to the dimensions that are acceptable for lap-welded patch plate repairs as outlined in API 653. For a successful repair, the size of the patch plate is critical. API 653 specifies minimum size requirements for the patch plates used in repairing leaks or damaged areas on aboveground storage tanks. The accepted dimensions of four inches by five inches accommodate the necessary coverage area to effectively provide structural support and integrity to the tank wall, while also allowing for sufficient weld coverage around the perimeter. Using a patch that meets or exceeds these dimensions ensures that the repair can withstand operational stresses without failure. Larger or smaller dimensions, such as eight inches by two inches, two inches by two inches, or six inches by three inches, may not comply with the specified repair requirements. Patch plates that are too small may not cover the damaged area adequately or provide sufficient structural reinforcement, leading to potential integrity issues within the storage tank.

The correct answer pertains to the dimensions that are acceptable for lap-welded patch plate repairs as outlined in API 653. For a successful repair, the size of the patch plate is critical. API 653 specifies minimum size requirements for the patch plates used in repairing leaks or damaged areas on aboveground storage tanks.

The accepted dimensions of four inches by five inches accommodate the necessary coverage area to effectively provide structural support and integrity to the tank wall, while also allowing for sufficient weld coverage around the perimeter. Using a patch that meets or exceeds these dimensions ensures that the repair can withstand operational stresses without failure.

Larger or smaller dimensions, such as eight inches by two inches, two inches by two inches, or six inches by three inches, may not comply with the specified repair requirements. Patch plates that are too small may not cover the damaged area adequately or provide sufficient structural reinforcement, leading to potential integrity issues within the storage tank.