Issues regarding the wire conduit for instruments in the device
Thread Content
As indicated in the title, for most of our devices, the wiring tubes that run downward from the cable trays end at a three-way explosion-proof wiring box; the two ends of this box serve as entry and exit points for the instrument circuits, while the vertically downward-facing end is generally used as a drainage outlet； Basically, this is the case with many professional construction companies such as those in the petrochemical industry; in explosion-proof areas, we use intrinsically safe signals and intrinsically safe wiring, and explosion-proof gland fittings or flexible explosion-proof pipes for the instruments themselves ； But now many experts who come to conduct inspections are quite amateurish; they consider that the vertically downward drainage outlet in the tee fitting does not comply with the regulations and needs to be corrected ； It’s really frustrating; you can’t go and confront him either:@ ； Here, I would like to ask the experts: is it permissible to have such provisions clearly specified in the regulations? ? ? Please provide some guidelines. Inspections related to safety and environmental protection are becoming more frequent these days, and it’s good that such attention is given. However, those fake experts who are good only at talking the talk without putting it into practice are really annoying ； There are also some military veterans who are assigned directly to various local areas to take on temporary positions; many of them are in charge of safety matters. In fact, they know nothing about the work involved. Every time they come for inspections, they act like high-ranking officials or imperial envoys, refusing to listen to any explanations and issuing harsh criticisms right away ； To be honest, I really want to slap that guy:@ We welcome experts to provide guidance and conduct inspections ； Everyone hopes that the working environment can be as safe as possible, and hopes that these so-called inspection teams will become more standardized. (A certificate doesn’t mean something is correct.) The topic is getting more and more off-topic:$. Experts, please establish some guidelines. Guidelines specific to three-way drainage outlets would be best. Any more pseudo-experts spouting nonsense should be confronted with the relevant regulations;P
The atlas is a three-way connection, but it’s not mandatory; it’s indeed inappropriate to construct according to the atlas – it’s metaphysical! Using a tee for drainage is a bad practice; this time I agree with the experts.
If you’re just going through the motions for an inspection, showing them the album will do. In practice, I basically don’t implement three-way drainage systems – it’s a waste of money. Continuous protection isn’t necessary; instead, various measures can be taken to prevent water ingress, including proper design and regular maintenance.
Haha, it’s the same situation for us – the old equipment’s instrument wiring ducts all have three-way drainage outlets, and now those outlets are all blocked. When the local work safety supervision agency came to inspect, they found that one drainage outlet wasn’t blocked and fined us 10,000 yuan. It’s funny – in the past, if a tee drain wasn’t installed, a fine would be imposed during a professional inspection. Now, non-professional inspections do not result in fines. Just like in the past when it came to sports, today there’s one policy and tomorrow another; people are constantly busy making adjustments without knowing which standard is correct. Anyway, whoever the fuck has more power, that’s who we listen to. Just make sure not to lose your salary and bonuses.
Due to the blocked drainage, it is easy for water to enter the instruments during the rainy season in summer. When one is found, deal with it one by one; it can’t be said that the instrument has water ingress, so other faults are fabricated. Some time ago, the workload was so high that it was exhausting; now such problems basically no longer exist. Local work safety authorities are unable to identify major problems; there are instead a multitude of trivial issues that have to be dealt with on a daily basis.
Article 7.3.6 of SH/T 3019-2016, \"Code for Design of Instrumentation Piping in Petrochemical Industries\", stipulates that when the protective pipe is laid from top to bottom to reach the instrument, a drain tee should be installed at the end of the pipe. ” We have explained this to the safety supervision department here, and all the plugs that were required to be installed on the drainage outlets have been removed. However, the outlet of the instrument must have an explosion-proof sealed connector.
We ran into the same problem as you; we had no other choice but to buy plugs and use them to block off the wire conduit areas (personal advice: if plugs are indeed used, it’s better if they have a small hole). Then we had to add an explosion-proof connector at the point where the wires enter the device – it was such a hassle and required a lot of work! ! !