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1、Online test for safety valve 安全阀在线检测技术,Safety Valve online test is a development of new technology, its application to resolve the in-service safety valve periodic inspection, Chinese regulations require the safety valve should be tested at least once a year. During online test, The plant need not s
2、hutdown and as usual running.安全阀在线检测技术是一项发展中的新技术，它的应用在一定程度上可解决在役安全阀的周期性定检,中国法规要求安全阀每年至少校验一次.装置不需停车,生产照常进行。,Application and character 适用范围及特点,All test process does not touch the work of media in safety valve, so the use of instrument is independent of the media types,internal pressure and temperature
3、.检测过程不接触工作介质，因此，理论上讲该仪器的使用与检测安全阀的工作介质种类(气体，液体）及介质压力、温度无关。 For the medium of granular, easy-coke safety valve, should not use online test.对于介质是颗粒状、易结焦的安全阀，不宜使用在线检测。 For full-size models of spring-loaded safety valve calibration.用于各种规格型号的弹簧式安全阀校验,It do not stop the plant and measure the valve set pres
4、sure, back pressure, open height, without the need to improve the system pressure.它能在生产装置不停车状况下测量安全阀的开启压力、回座压力、开启高度，而不需要提高系统压力 If the safety valve leakage the instrument can be forced to close the disc and , without affecting the value of set pressure. 回座后有泄漏时可用强关系统将阀瓣强行关闭,而不影响定压值,Specifications技术指标
5、,Measurement error of set pressure not exceed 2% 开启压力测量误差2% The use of ambient temperature -10 80 使用环境温度 -1080 The environmental humidity not exceed 85% 使用环境湿度85%,Economic efficiency经济效益,Because of periodic test safety valve to lead stop running plant is unnecessary. Online test can solve and avoide
6、 shutdown plant caused by human, material of loss.为企业节省了因停车检测安全阀而造成的人力、物力、财力的损耗，大大的为企业降低了成本，提高了生产效益。 Before the overhaul we began to pick up the safety valve of the process isolate with difficulties and need not off-line to disassemble checking,especially for the large-caliber or high-position valve
7、s, saving costs and reduce duration. 大检修开始停车时筛选出工艺隔离困难以及不需要离线解体检修的安全阀，尤其是大口径高部位阀,节省费用和工期.,Online test results 在线校验效果,We have tested safety valve on-line about 150 pieces since 2007, none of irregular leakage. The conclusion of the on line test technology is more reliable and be worth extending. 从200
8、7年开始我们已经进行在线校验的安全阀大概150台,均未出现非正常泄漏,该技术比较可靠,值得推广应用。,Emergency response plan 应急预案,For the safety valve with the flammable and explosive medium online test, we should first test explosion site, another for the flammable and explosive gas leakage from the valve stem, the response to the scene to conduct
9、 a detailed analysis of the situation, connect nitrogen to purge, select explosion-proof tool, equipped with dry powder fire extinguishers. When necessary, the operator must wear a anti-static clothing.对介质为易燃易爆的安全阀在线检测时，应首先对现场进行测爆，另外对于易燃易爆气体从阀杆处有泄漏危险的安全阀检测时，应对现场情况进行详细分析，接氮气吹扫，使用防爆工具，配备干粉灭火器。必要时操作人员必
10、须穿戴防静电服具。,Emergency response plan 应急预案,2. The operator must clear the working states of safety valve(medium,pressure,temperature and so on). Prevention of splash and burn for the high temperature is needed. 现场校验人员必须清楚安全阀的工作状况（工作介质，压力，温度等），对高温安全阀应有防溅、防烫措施。,Emergency response plan 应急预案,3. Always keep
11、in touch with process while testing and take effective emergency actions in the unusual state. 应时刻与工艺人员保持联系，对检测时发生的异常情况采取有效应急措施。 4. If the safety valve open unusually during calibration, the operator must be forced to close the disc by limited device. 如在测量过程中出现安全阀突跳时，校验人员必须立即用强关限位装置将安全阀关闭，以极少量的限制介质的排放量。,
