Drainage and sewage pipeline noise is primarily generated by structural vibrations induced by continuous water flow impacting the pipe wall, representing one of the most prevalent sources of concealed acoustic disturbance in residential buildings and hotels. Traditional pipe lagging with cotton wrapping provides only rudimentary sound absorption and fails to suppress pipe wall vibrations, resulting in limited acoustic insulation effectiveness and an inability to fundamentally resolve the issue of abnormal flow-induced noise within pipelines. Our newly developed acoustic lagging membrane specifically engineered for piping systems addresses the critical challenge of vibration-borne sound transmission in pipelines. It delivers superior sound insulation performance, facilitates convenient installation, and offers exceptional conformability, enabling tight wrapping around various types of drainage pipes. This solution effectively dampens pipe wall vibrations and blocks the propagation of flow-induced noise. Suitable for acoustic retrofitting of water supply and drainage piping systems across diverse building types—including residential and hospitality projects—the system resolves the issue of inter-unit flow noise cross-talk at its source, substantially enhancing the acoustic comfort and tranquility of interior spaces.