5.2.1 复合型密封垫片材料的长度、宽度根据用户要求,其允许偏差为 ±5 mm 。
5.2.2 复合型密封垫片材料的厚度允许偏差应符合表1规定。如果用户对厚度偏差有特殊要求时,按用户要求执行。
表1 厚度允许偏差
公称厚度 | 允许偏差 | 同一张板厚度差 |
公称厚度≤0.50 | ±0.05 | ≤0.05 |
0.5<公称厚度≤1.00 | ±0.10 | ≤0.10 |
1.00<公称厚度≤2.00 | ±0.15 | ≤0.15 |
公称厚度>2.00 | ±0.20 | ≤0.20 |
5.3.1 抄取法无石棉金属复合板的性能要求应符合表2规定。
表2 抄取法无石棉金属复合板性能要求
项目 | 金属齿板复合板(CJC) | 金属平板复合板(CJP) | |
压缩率 % | 7~17 | 7~17 | |
回弹率 % | ≥ 35 | ≥ 30 | |
蠕变松弛率 % | ≤40 | / | |
浸渍 IRM903油后性能 | 增厚率 % | ≤15 | ≤15 |
增重率 % | ≤20 | ≤20 | |
浸液外观变化 | 无起泡、脱落现象 | / | |
浸渍ASTM燃料油B后性能 | 增厚率 % | ≤15 | ≤15 |
增重率 % | ≤15 | ≤15 | |
浸液外观变化 | 无起泡、脱落现象 | / | |
浸渍蒸馏水+乙二醇 | 增厚率 % | ≤20 | ≤20 |
增重率 % | ≤25 | ≤25 | |
浸液外观变化 | 无起泡、脱落现象 | / | |
对金属材料的腐蚀性 | 无腐蚀 | 无腐蚀 | |
剥离性 | 无剥离 | 无剥离 |
5.3.2 辊压法无石棉金属复合板的性能要求应符合表3规定 。
表3 辊压法无石棉金属复合板性能要求
项目 | 金属齿板复合板(CJC) | 金属平板复合板(CJP) | |
压缩率 % | 6~15 | 6~15 | |
回弹率 % | ≥40 | ≥35 | |
蠕变松弛率 % | ≤40 | / | |
浸渍 IRM903油后性能 | 增厚率 % | ≤15 | ≤15 |
增重率 % | ≤15 | ≤15 | |
浸液外观变化 | 无起泡、脱落现象 | / | |
浸渍ASTM燃料油B后性能 | 增厚率 % | ≤15 | ≤15 |
增重率 % | ≤15 | ≤15 | |
浸液外观变化 | 无起泡、脱落现象 | / | |
浸渍蒸馏水+乙二醇 | 增厚率 % | ≤2.0 | ≤2.0 |
增重率 % | ≤5.0 | ≤5.0 | |
浸液外观变化 | 无起泡、脱落现象 | / | |
热老化性能 | 厚度变化率 % | ±2.0 | / |
质量变化率 % | ±2.0 | / | |
对金属材料的腐蚀性 | 无腐蚀 | 无腐蚀 | |
剥离性 | 无剥离 | 无剥离 |
5.3.3 柔性石墨金属复合板的性能要求应符合表4规定 。
项目 | 金属齿板复合板(MJC) | 金属平板复合板(MJP) | |
压缩率 % | 15~35 | 20~35 | |
回弹率 % | ≥20 | ≥20 | |
浸渍 IRM903油后性能 | 增重率 % | ≤20 | ≤20 |
浸液外观变化 | 无起泡、脱落现象 | / | |
浸渍ASTM燃料油B后性能 | 增重率 % | ≤20 | ≤20 |
浸液外观变化 | 无起泡、脱落现象 | / | |
耐温失量 % | 450℃ | ≤1.0 | ≤1.0 |
600℃ | ≤10 | ≤10 | |
剥离性 | 无剥离 | 无剥离 |
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metal washers; technical delivery conditions
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