Final answer:
The test pressure for a pneumatic leak test typically ranges from 110% to 150% of the design pressure, but the exact percentage should be determined by consulting relevant standards and regulations such as the ASME Boiler and Pressure Vessel Code.
Step-by-step explanation:
If a pneumatic leak test is used, the test pressure should typically be a certain percentage of the design pressure. However, the exact percentage can vary depending on standards and regulations. Common practice and some guidelines suggest that the test pressure could range from 110% to 150% of the design pressure to ensure integrity without causing damage; however, this can vary, and specific standards or codes such as the ASME Boiler and Pressure Vessel Code should be consulted for precise requirements. For example, ASME PCC-2 Article 5 states to use 110% of design pressure for pneumatic leak testing. It's crucial to follow the proper safety procedures and regulations for testing to prevent any hazardous situations.
Therefore, without specific code or standard mentioned, we cannot state an exact percentage that should be used for a pneumatic leak test. Always refer to the appropriate standards or regulations for your particular application.