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EN 681-1 Elastomeric seals-Material requirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber, 弹性密封件-给水排水用管道连接密封件的材料要求.第1部分:硫化橡胶 |
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| 4 | Materials/ 材料要求 |
| 4.1.1 | General/ 总则 |
| 4.1.2 | Effect on water quality/ 对水质的影响 |
| 4.2 | Finished seal requirements/ 成品密封圈的要求 |
| 4.2.1 | Dimensional tolerances /尺寸公差 |
| 4.2.2 | Imperfections and defects/ 疵点和缺点 |
| 4.2.3 | Hardness/ 硬度(ISO 48、GB/T 6031) |
| 4.2.4 | Tensile strength and elongation at break/ 拉伸强度和扯断伸长率（ISO 37、GB/T 528） |
| 4.2.5 | Compression set in air/ 在空气中的压缩永久变形 |
| 4.2.5.1 | General/ 总则 |
| 4.2.5.2 | Compression set at 23°C, 70°C and 125°C/ 在23°C,70°C 和125°C下的压缩永久变形(ISO 815、GB/T 7759) |
| 4.2.5.3 | Low temperature compression set at (-10°C)/ 在-10°下的低温压缩永久变形(ISO 815、GB/T 7759) |
| 4.2.6 | Accelerated ageing in air/ 在空气中的加速老化(ISO 188、GB/T 3512) |
| 4.2.7 | Stress relaxation in compression/ 压缩应力松弛(ISO 3384、GB/T 1685) |
| 4.2.8 | Volume change in water/ 在水中的体积变化(ISO 1817、GB/T 1690) |
| 4.2.9 | Ozone resistance/ 耐臭氧（ISO 1431-1、GB/T 7762） |
| 4.2.10 | Tear strength for joint seals for hot water supply/撕裂强度(ISO 816、GB/T 12829) |
| 4.2.11 | Compression set in water for joint seals for hot water supply/ 在水中的压缩永久变形 |
| 4.2.12 | Splices of prevulcanized profile ends/ 预硫化橡胶型材首尾的搭接 |
| 4.2.12.1 | Spliced joints shall be vulcanized/ 接头 |
| 4.2.12.2 | Strength of spliced joints/ 接头的强度 |
| 4.3 | Optional requirements for joint seals for cold water supply, drainage and sewerage/ 给水排水用管道连接密封件的可选要求 |
| 4.3.1 | General/ 总则 |
| 4.3.2 | Low temperature performance at -25°C/ -25°C下的低温性能 |
| 4.3.3 | Volume change in oil/ 在油中的体积变化 |
| 9 | Designation/ 标识代码 |
| 10 | Marking and labeling/ 标志与标签 |
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