Abstract: In this paper， the current product standard and manufacturing technology of polyethylene （PE） gas valve were described briefly， and the common problems in production quality and failure modes as well as the reasons for quality problems in the gas valves were analyzed. The quality control technologies and requirements of the gas valves， such as promoting the research and development of valve manufacturing， testing and evaluation technologies， and strengthening the production quality control management of the gas valve were proposed， which provided a reference for the development of manufacturing technology of gas valves and the improvement of their product quality.

Key words: polyethylene gas valve, damage mode, quality control