What requirement must be met to add reinforcing plates to existing un-reinforced nozzles according to API 653?

What requirement must be met to add reinforcing plates to existing un-reinforced nozzles according to API 653?

• A. The reinforcement plate may not be added to the inside of the plate
• B. A telltale hole shall be drilled through the shell
• C. The reinforcement plate must be the same material as the nozzle
• D. Sufficient nozzle projection must exist

Answer: (D)

To add reinforcing plates to existing un-reinforced nozzles according to API 653, sufficient nozzle projection must exist. This requirement ensures that there is enough material to properly attach the reinforcing plate while maintaining the structural integrity and safety of the nozzle. Adequate projection helps to provide a solid base for the reinforcement, enabling effective load distribution and stress handling, which are crucial for the operational reliability of the aboveground storage tank. The nozzle projection is critical because if it is insufficient, there may not be enough area for proper welding or fastening, which can lead to failure of the joint or the nozzle under operational conditions. In summary, having sufficient nozzle projection is vital for maintaining the strength and effectiveness of the nozzle and its reinforcement, adhering to the standards set forth by API 653.

To add reinforcing plates to existing un-reinforced nozzles according to API 653, sufficient nozzle projection must exist. This requirement ensures that there is enough material to properly attach the reinforcing plate while maintaining the structural integrity and safety of the nozzle. Adequate projection helps to provide a solid base for the reinforcement, enabling effective load distribution and stress handling, which are crucial for the operational reliability of the aboveground storage tank.

The nozzle projection is critical because if it is insufficient, there may not be enough area for proper welding or fastening, which can lead to failure of the joint or the nozzle under operational conditions. In summary, having sufficient nozzle projection is vital for maintaining the strength and effectiveness of the nozzle and its reinforcement, adhering to the standards set forth by API 653.