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对大型法兰O型圈带压堵漏用密封胶(真空封泥、真空封脂、低温胶、硅胶等)的性能(流动性能、固化行为、黏结性能、力学性能等)进行分析并筛选出最适宜的带压堵漏用密封胶。结果表明:硅胶的综合性能优于其他密封胶,其流动变化率为11.0%;固化速率受温度影响较大,40℃时达到9.5 mm/d;180°剥离强度为9.0~10.5 N/mm。A胶、B胶混合质量比为10:1时,硅胶力学性能最佳(耐压性能为20.14 MPa,拉伸强度7.3 MPa,撕裂强度为25 N/mm,邵A硬度为31),可作为大型碳钢法兰O型圈带压堵漏用黏结材料。
The properties (flowability, curing behavior, bonding properties, mechanical properties, etc.) of the sealant with large pressure flanges (pressure seal, vacuum sealing, low temperature adhesive, silicone, etc.) The most suitable pressure sealing with sealant. The results show that the overall performance of silica gel is better than that of other sealants. The rate of change of flow rate is 11.0%. The curing rate is greatly influenced by temperature, reaching 9.5 mm / d at 40 ℃. The peel strength at 180 ° is 9.0-10.5 N / mm. The best mechanical properties of silica gel (pressure resistance of 20.14 MPa, tensile strength of 7.3 MPa, tear strength of 25 N / mm and Shore A hardness of 31) were obtained when the mass ratio of A to B was 10: 1 O-ring as a large carbon steel flange with pressure sealing materials.