橡胶密封件 给水、排水和污水管道用接头环 材料规范

[中文适用范围]： 本文件规定了以下用途的硫化橡胶密封件所用材料的要求：a) 冷饮用水供应（最高 50°C）；b) 排水、污水处理和雨水系统（连续流最高 45°C，间歇流最高 95°C）。规定的密封件的不同名称根据其类型、应用和要求定义（见表 5）。还给出了成品接头密封件的一般要求；特定应用要求的任何其他要求均在相关产品标准中规定，同时考虑到管道接头的性能取决于密封材料的特性、密封几何形状和管道接头设计。本文件旨在在适当情况下与规定接头性能要求的产品标准一起使用。本文件适用于所有管道材料的接头密封件，包括铁、钢、粘土、纤维水泥、混凝土、钢筋混凝土、塑料和玻璃增强塑料。它适用于复合或非复合密封件的弹性体组件。对于硬度范围为 76 IRHD-M 至 95 IRHD-M 的材料的复合密封件，只有当材料参与密封功能或密封的长期稳定性时，才适用断裂伸长率、压缩变形和应力松弛的要求。设计中带有封闭空隙的接头密封件也属于本文件的范围。 [外文原描述]： This document specifies requirements for materials used in vulcanized rubber seals for the following: a) cold drinking-water supplies (up to 50 °C); b) drainage, sewerage, and rainwater systems (continuous flow up to 45 °C and intermittent flow up to 95 °C). The different designations of seals specified are defined according to their type, application, and requirements (see Table 5 ). General requirements for finished joint seals are also given; any additional requirements called for by the particular application are specified in the relevant product standards, taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry, and pipe joint design. This document is intended to be used, where appropriate, with product standards which specify performance requirements for joints. This document is applicable to joint seals for all pipeline materials, including iron, steel, clay, fibre cement, concrete, reinforced concrete, plastics, and glass-reinforced plastics. It is applicable to elastomeric components of composite or non-composite seals. In the case of composite seals for materials of hardness ranges from 76 IRHD-M to 95 IRHD-M, the requirements for elongation at break, compression set, and stress relaxation apply only when the material is participating in the sealing function or in the long-term stability of the seal. Joint seals made with an enclosed void as part of their design are included in the scope of this document.