【摘要】 分析了水下气压试验、水压试验和涡流或超声波无损检测等3种泄漏密实性试验在不锈钢管和钛管泄漏量检查中的优缺点,介绍了气动泄漏试验的原理、方法、判别准则及其优越性。分析认为,在不锈钢管和钛管的泄漏密实性检测中,气动泄漏试验的灵敏度高,且全自动,但其关键是设计或采购具有高灵敏度压力或压差的传感器,并采用激光打孔法制作0.076～0.152mm细微泄漏孔的标样管。更多还原

【Abstract】 Analyzed are the advantages and shortcomings of the three typical leak testing processes for the stainless steel tube and the titanium alloy tube,i.e.,underwater pneumatic test,hydrostatic test and eddy-current or ultrasonic nondestructive test.Described are the work principle,operation procedure,evaluation criteria and advantages of the new pneumatic leak testing process.The analysis leads to such a conclusion that among the commonly-used leak testing processes for the stainless steel tube and the titanium alloy tube,the said new pneumatic process is distinguished from the others with such advantageous features as high sensitivity,full automation,and above all,employment of hi-sensitive pressure or differential pressure sensor,and using reference pipe with 0.076～0.152 mm fine leakage holes as made by means of the laser-punching method.更多还原