GB/T 17344-2025 "Packaging — Packaging Containers — Test Method for Gas Tightness" is a standard used to evaluate the ability of transport packaging containers to isolate gases. By inflating gas into the packaging container to create a pressure difference between the inside and outside, it detects whether gas leaks, thereby assessing its gas tightness performance. This standard is applicable to quality control in the transportation packaging of various products such as food, pharmaceuticals, and chemicals. The testing instruments mentioned in the standard are primarily universal airtightness testers, which typically employ principles such as positive pressure inflation or negative pressure evacuation to simulate and detect leaks. This provides a unified methodological basis for evaluating the safety and reliability of packaging containers.