What is the safe maximum pressure for a scuba tank?

The safe maximum pressure for a scuba tank is generally considered to be 3000 psi for most standard aluminum and steel tanks used in recreational diving. This maximum pressure is based on the design and testing standards that tanks undergo to ensure compliance with safety regulations and to withstand the operational stresses encountered during dives. Scuba tanks are engineered to be robust and durable; however, exceeding the design pressure can significantly increase the risk of tank failure, which can be dangerous underwater.

While some specialized tanks may be rated for higher pressures (like 3500 or 4500 psi), typical recreational diving tanks are commonly rated at 3000 psi. It's essential for divers to familiarize themselves with the specifications of their specific diving equipment. Using a pressure greater than what the tank is designed for can lead to catastrophic failure, which is why understanding the correct maximum is critical for safety during dives.