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Solving explosion-proofing problems

2017-08-03View Original

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Mass flow meter in the IICT6 area, with a medium temperature of 130 degrees. According to explosion-proof standards, the temperature class of the flow meter is affected by the medium and cannot meet the T6 requirement; how can this issue be resolved?
Reply #22017-08-03
Additional note: After studying GB50058 and the requirements for process measurement, it is not possible to move this flow meter out of the explosion-proof area or to a zone with lower temperature conditions.
Reply #32017-08-03
Is the electrical part also 130 degrees? It still hasn’t melted.
Reply #42017-08-03
I’m genuinely seeking help; please provide an explanation from a regulatory perspective, either using foreign standards or domestic standards.
Reply #52017-08-04
Its medium temperature is 130 degrees. According to the explosion protection standards, the temperature class of the flow meter is affected by the medium and cannot meet the T6 requirement. How was this conclusion reached? Which explosion protection standard applies? ? ? ?
Reply #62017-08-04
In my opinion, the temperature here refers not to the temperature of the medium. It is the operating temperature of your instrument’s electrical system.
Reply #72017-08-04
It shows that your process design is inherently unsafe.
Reply #82017-08-04
IICT6 refers to the explosion-proof wiring box for your flow meter, while T6 indicates that the maximum temperature of the wiring box housing of your flow meter is not greater than 85°C. It has nothing to do with the medium being measured by the flow meter. Additionally, if the temperature of something in the area where the flow meter is located exceeds 85 degrees, it could ignite certain flammable gases or vapors; this simply indicates that proper consideration was not given during the process design – pipes designed to withstand temperatures of 130 degrees were used in that area, and this is unrelated to the electrical department. Additionally, T6 is suitable for all environments from TT to T6; in other words, if your flow meter is of type IICT6, the medium in the environment where it is used may actually be of type IICT1. It cannot be said outright that a medium at 130°C is incorrect – refer to the standard GB50058-2014 for guidance
Reply #92017-08-04
Both the upper floor and the black pig are correct answers. By \"explosion-proof,\" it refers to protection against explosions in the electrical components; it doesn’t mean that everything is explosion-proof. If it’s a flameproof standard, then only the electrical wiring connections and the enclosures of the circuit boards need to be strong enough to withstand internal explosions as well as external vibrations. It doesn’t mean that every single component of the instruments has a sturdy enclosure; And in the case of intrinsically safe explosion protection, the current and power in the circuit are low, so no sparks are generated. Whatever it is, it’s just referring to the electrical part, that contact medium, right? No contact, is the temperature 130°C? No, generally T4 is sufficient. Why is that? Isn’t it because the casing won’t reach such high temperatures? If it’s that hot, how can one play? Are instrument technicians all made of iron palms?

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