What type of testing evaluates the weld’s ability to withstand pressure?

The correct approach to evaluating a weld's ability to withstand pressure is through destructive testing. Destructive testing involves subjecting a sample of the weld to conditions that cause failure, such as increasing pressure until the weld either yields or breaks. This allows for a comprehensive assessment of the weld's structural integrity and its ability to maintain pressure without leaking or failing.

Other types of testing, such as visual testing and non-destructive testing, have their own specific uses but do not directly measure the pressure resistance capability of a weld in the same way. Visual testing focuses on assessing surface defects and does not provide insights into the internal integrity or pressure resistance of the weld. Non-destructive testing, while it can identify flaws and assess the quality of a weld without causing damage, does not gauge how much pressure a weld can actually withstand under operational conditions.

Destructive testing, therefore, is essential for scenarios where maximum tolerance and pressure handling are critical to safety and functionality, as it offers definitive proof of a weld's actual performance under stress conditions.