Accelerated life test Clause Samples
An accelerated life test clause defines the procedures and conditions under which products or materials are subjected to intensified stress or usage to simulate long-term effects in a shorter period. This clause typically outlines the specific parameters for testing, such as increased temperature, pressure, or operational cycles, and may specify the standards or methodologies to be followed. Its core practical function is to assess the durability and reliability of products quickly, helping parties identify potential failures and ensure compliance with performance requirements before widespread deployment.
Accelerated life test. Eight TPRD units undergo testing; three at the manufacturer's specified activation temperature, Tact, and five at an accelerated life temperature, Tlife = 9.1 x Tact0.503. The TPRD is placed in an oven or liquid bath with the temperature held constant (±1 °C). The hydrogen gas pressure on the TPRD inlet is 125 per cent NWP (±1 MPa). The pressure supply may be located outside the controlled temperature oven or bath. Each device is pressured individually or through a manifold system. If a manifold system is used, each pressure connection includes a check valve to prevent pressure depletion of the system when one specimen fails. The three TPRDs tested at Tact shall activate in less than ten hours. The five TPRDs tested at Tlife shall not activate in less than 500 hours.
Accelerated life test. Eight TPRD units undergo testing; three at the manufacturer's specified activation temperature, Tf, and five at an accelerated life temperature. The Accelerated Life test temperature is TL, given in °C by the expression: 0.502 𝑇𝐿 = (𝛽 + 𝑇 0.498 −1 + ) Where β = 273.15, TME is 85 °C, and Tf is the manufacturer's specified activation temperature. The TPRD is placed in an oven or liquid bath with the temperature held constant (±1 °C). The pressure on the TPRD inlet is ≥ 125 per cent NWP. The pressure supply may be located outside the controlled temperature oven or bath. Each device is pressurized individually or through a manifold system. If a manifold system is used, each pressure connection may include a check valve to prevent pressure depletion of the system when one specimen fails. The three TPRDs tested at Tf shall activate in less than 10 hours. The five TPRDs tested at TL shall not activate in less than 500 hours and shall meet the requirements of Annex4, paragraph 1.8. (Leak test).
Accelerated life test. Eight TPRD units undergo testing; three at the manufacturer's specified activation temperature, Tf, and five at an accelerated life temperature. The Accelerated Life test temperature is TL, given in °C by the expression: Where β = 273.15, TME is 85 °C, and Tf is the manufacturer's specified activation temperature. The TPRD is placed in an oven or liquid bath with the temperature held constant (±1 °C). The pressure on the TPRD inlet is ≥ 125 per cent NWP. The pressure supply may be located outside the controlled temperature oven or bath. Each device is pressurized individually or through a manifold system. If a manifold system is used, each pressure connection may include a check valve to prevent pressure depletion of the system when one specimen fails. The three TPRDs tested at Tf shall activate in less than 10 hours. The five TPRDs tested at TL shall not activate in less than 500 hours and shall meet the requirements of Annex4, paragraph 1.8. (Leak test).