ISO 16589规定了使用密封元件的密封件，密封元件由基于热塑性材料（如聚四氟乙烯（PTFE））的适当配方化合物制成。它们被认为适合在低压条件下使用。 ISO 16589-4:2011规定了可用于密封鉴定目的的一般性能试验。包括材料质量控制、动态测试和补充低温测试要求。

ISO 16589 specifies seals utilizing sealing elements manufactured from suitably formulated compounds based on thermoplastic materials, such as polytetrafluoroethylene (PTFE). They are considered suitable for use under low-pressure conditions. ISO 16589-4:2011 specifies general performance tests which can be used for seal qualification purposes. Materials quality control, dynamic testing, and supplementary low-temperature testing requirements are covered.