ISO 16137:2006规定了由热塑性材料制成的止回阀的设计、功能特性和制造要求，旨在允许液体仅在一个方向上通过阀门，并防止回流，其与管道系统的连接，车身材料及其压力/温度等级在-40摄氏度到+120摄氏度之间，使用寿命为25年，并且还规定了它们的测试。 ISO 16137:2006适用于安装在工业管道系统中的阀门，不考虑应用领域和输送的流体。 它涉及到DN 8、DN 10、DN 15、DN 20、DN 25、DN 40、DN 50、DN 65、DN 80、DN 100、DN 125、DN 150、DN 200、DN 250、DN 300、DN 350、DN 400、DN 500和DN 600的范围，以及PN 6、PN 10、PN 16、PN 25、类别150和类别300的范围。

ISO 16137:2006 specifies requirements for the design, functional characteristics and manufacture of check valves made of thermoplastics materials intended to allow the flow of liquid fluids through the valve in one direction only and to prevent backflow, their connection to the pipe system, the body materials and their pressure/temperature rating between -40 degrees Celsius and + 120 degrees Celsius, for a lifetime of 25 years, and also specifies their tests. ISO 16137:2006 is applicable to valves to be installed in industrial pipe systems, irrespective of the field of application and the fluids to be conveyed. It is concerned with the range of DN 8, DN 10, DN 15, DN 20, DN 25, DN 40, DN 50, DN 65, DN 80, DN 100, DN 125, DN 150, DN 200, DN 250, DN 300, DN 350, DN 400, DN 500 and DN 600, and the range of PN 6, PN 10, PN 16, PN 25, and Class 150 and Class 300.