Gas leakage rate testing device and method capable of being used for non-metal hydrogen conveying pipeline

The invention relates to the field of gas energy conveying and leakage testing, in particular to a gas leakage rate testing device and method for a non-metal hydrogen conveying pipeline. The gas leakage rate testing device comprises a detection piece, wherein a detection cavity suitable for placing a to-be-tested pipeline is formed in the detection piece, and a sealed test cavity is formed after the to-be-tested pipeline is placed in the detection cavity; the calibration cavity is selectively communicated with the test cavity; the first gas filling assembly is selectively communicated with the calibration cavity so as to be suitable for injecting gas with first set pressure into the calibration cavity; the measuring unit is configured to measure the pressure and temperature in the calibration cavity and the pressure and temperature in the test cavity and calculate the volume of the test cavity; and the leakage rate testing unit is configured to obtain a pressure change value of the test cavity within a preset