[Q&A Question 305] 2017.11.19
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This post was last edited by Green Lotus on 2017-11-19 at 11:28. [Q&A Question 305] 2017.11.19: Under what defects should pressure gauges be stopped from use? Answer: If, during use, it is found that the pressure indication is malfunctioning, the scale is unclear, the dial glass is broken, the pointer does not return to zero after pressure release, or the seal is damaged, the device should be stopped from use immediately and replaced. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have begun) https://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) https://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) https://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)
In cases of faulty pressure indication, unclear scales, broken dial glass, needles that do not return to zero after pressure release, or damaged seals, use should be stopped immediately and the device replaced
If, during use, an on-site pressure gauge exhibits issues such as faulty pressure indication, unclear scales, broken dial glass, a pointer that does not return to zero after pressure release, or damaged seals, it should be stopped from use immediately and replaced.
If, during use, it is found that the pressure indication is faulty, the scale is unclear, the dial glass is broken, the pointer does not return to zero after pressure release, or the seal is damaged, it should be stopped from use immediately and replaced.
If, during use, an on-site pressure gauge exhibits issues such as faulty pressure indication, unclear scales, broken dial glass, a pointer that does not return to zero after pressure release, or damaged seals, it should be stopped from use immediately and replaced.
One is that the pointer does not return to zero. Second, there are areas where oil is leaking.
If, during use, an on-site pressure gauge exhibits issues such as faulty pressure indication, unclear scales, broken dial glass, a pointer that does not return to zero after pressure release, or damaged seals, it should be stopped from use immediately and replaced.
If, during use, an on-site pressure gauge exhibits issues such as faulty pressure indication, unclear scales, broken dial glass, a pointer that does not return to zero after pressure release, or damaged seals, it should be stopped from use immediately and replaced.
Answer: 1) For pressure gauges with a stop pin, the pointer cannot return to the stop pin when there is no pressure; for pressure gauges without a stop pin, the value of the pointer at zero pressure exceeds the allowable error of the pressure gauge. 2) The dial cover glass is cracked or the markings on the dial are blurred ； 3) The seal is damaged or the verification validity period has expired ； 4) Leakage in the gauge spring tube or loose gauge pointer ； 5) Broken pointer or severe casing corrosion ； 6) Other defects that affect the accurate indication of the pressure gauge.
If, during use, an on-site pressure gauge exhibits issues such as faulty pressure indication, unclear scales, broken dial glass, a pointer that does not return to zero after pressure release, or damaged seals, it should be stopped from use immediately and replaced.
The pointer does not return to zero, the pointer remains stationary, the pointer oscillates