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南京市煤气公司液化石油气储灌场所用钢瓶角阀的密封原采用红丹调无水甘油,由于连接螺纹加工精度常达不到要求,导致角阀装配后密封性能不理想,漏气率高。每年夏季漏气现象尤为严重,就七七年二季度来看平均漏气率达百分之二点九八,其中六月份高达百分之四点四。钢瓶漏气不符合安全供气要求。为此,我们对维修钢瓶采用四氟乙烯胶带作角阀密封
The seal of the cylinder angle valve used in the liquefied petroleum gas storage and irrigating site of the Nanjing Gas Company was originally made of red dan with anhydrous glycerin. Since the processing precision of the connection thread often failed to meet the requirements, the sealing performance of the valve after assembly was not ideal, and the leakage rate was high. . Leakage is particularly severe each summer. The average leakage rate in the second quarter of 1977 was 2.98 percent, with 4.4% in June. Cylinder leaks do not meet the safety air supply requirements. For this purpose, we use PTFE tape as a seal for the maintenance cylinders.