a whole day working as a photographer for valve inspection
Due to one of an important customer visit Henan Quanshun Flow Control Science & Technology Co.,Ltd , I worked as photographer yesterday . It is very hot in workshop ,the temperature reached up to 40 Degree.All the people in workshop are in a sweat .It is the same for our customer .The people looks like more than 50 years ,worked as QA inspector in CNOOC. CNOOC is shor for China National offshore oil coporation . They have a very strictly inspection procedure .
He visited us to inspect the large size bi-directional sealing butterfly valves ,DN1400 ,pressure 1.0MPa .
Appearance of valve body inspection is the first stage .He not only looked the valve body carefully but also took some photo by mobile .Then he read our document carefully and asked our Engineer some questions . All of them are answered .For electric large size metal seated butterfly valve ,he checked the closing time of actuator . It only takes less than 2 minites .
The second stage is pressure test for both direction . He climbed up to our experiment table ,only found there are not any leakage ,that he set his heat at rest .The pressure of 1.0MPa is kept for 30 minites and there is not any pressure drop from the data from pressure gage .Both valve body pressure and sealing pressure test is ok .
The last stage is material inspection .Material analysis is made by spectrum analyzer . This equipement is purchased from Germany . The components of WCB material was showing on the display screen .Sometimes ,for large valves which having heavy weight ,it is difficult to do that . The tesing is made only on flat surface ,so we have to remachine the valve body .
In a word ,this is the firt time I worked as photographer and met so hard working QA inspector from the customer .This special day , left me a profound impression to me .
He visited us to inspect the large size bi-directional sealing butterfly valves ,DN1400 ,pressure 1.0MPa .
Appearance of valve body inspection is the first stage .He not only looked the valve body carefully but also took some photo by mobile .Then he read our document carefully and asked our Engineer some questions . All of them are answered .For electric large size metal seated butterfly valve ,he checked the closing time of actuator . It only takes less than 2 minites .
The second stage is pressure test for both direction . He climbed up to our experiment table ,only found there are not any leakage ,that he set his heat at rest .The pressure of 1.0MPa is kept for 30 minites and there is not any pressure drop from the data from pressure gage .Both valve body pressure and sealing pressure test is ok .
The last stage is material inspection .Material analysis is made by spectrum analyzer . This equipement is purchased from Germany . The components of WCB material was showing on the display screen .Sometimes ,for large valves which having heavy weight ,it is difficult to do that . The tesing is made only on flat surface ,so we have to remachine the valve body .
In a word ,this is the firt time I worked as photographer and met so hard working QA inspector from the customer .This special day , left me a profound impression to me .
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