What is the required strength for pressure vessels with a maximum design pressure of 15 psig?

For pressure vessels with a maximum design pressure of 15 psig, the correct required strength is that the vessel must withstand at least 3 times the design pressure. This requirement is based on safety standards in the industry that dictate how much pressure a vessel should handle to ensure structural integrity and safety during operation.

The rationale behind requiring the vessel to withstand three times the design pressure is to provide a significant safety margin. This accounts for unexpected pressure surges, material fatigue over time, and potential manufacturing defects. By testing or ensuring that the vessel can withstand pressures above its designed operational limit, engineers can help prevent catastrophic failures that could occur due to unforeseen circumstances.

Furthermore, this safety factor is a common industry practice, aligning with codes and standards that govern the design and construction of pressure vessels to promote safety in their operation. This approach minimizes the risk of accidents, ensuring that the design and construction phases have accounted for various pressure scenarios, material weaknesses, and long-term performance.

In summary, the requirement for vessels to handle at least three times the maximum design pressure is a critical aspect of ensuring their reliability and safety during use.