【Haichuan Safety Discussion】Hidden Dangers Around Us – The gas supply for automated instruments is connected to these instruments without being filtered or regulated first
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Walk every day, and you need not fear thousands of miles； Do it often, and you won’t fear a thousand things. Learn one safety in production knowledge point every day, continuously strengthen memory, and improve professional skills in safety in production. As a worker, the more vigilant you are, the greater your chances of survival ； As a business manager, more strictness means fewer risks. Only by treating every detail with professionalism can the safety goal of \"zero accidents\" be truly achieved. Safety is never a \"choice question\" but a \"must-answer question.\" There is no such thing as “more or less” when it comes to safety; only “100%”. A little more careful inspection today means fewer risks of accidents tomorrow. Security management is never a matter of focusing on the big issues while ignoring the small ones. The significance of identifying potential hazards lies in turning \"invisible risks\" into \"visible actions for correction.\" We firmly believe that every improvement in safety awareness and every enhancement in protective capabilities serves to build a stronger barrier for lives and ensure safety for businesses. Keep hidden dangers in sight and have safety by your side at all times! --------------------------------------------------------------------- All sea enthusiasts are welcome to participate in the discussion and share their insights on this thread: [HaiChuan Safety Discussion] – A collection of potential hazards around us. https://bbs.hcbbs.com/thread-5705518-1-1.html HaiChuan becomes even better with you all ------------------------------------------------------------------------------------------------------
Description of the hazard: The air supply for automated instruments is connected to the instruments without being filtered or regulated in pressure. The relevant standard is SH/T 3020-2013, \"Design Specifications for Air Supply in Petrochemical Instruments\", section 6.4.3: Before the instrument air reaches the supply point, a ball valve should be installed at the air supply source, and the air should be purified and its pressure regulated using an air filter and pressure regulator
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This potential risk has been identified very accurately! Failing to install a filter-regulator valve for the air supply of pneumatic instruments is indeed a common safety hazard. Compressed air from factories usually contains oil, water, and impurities; connecting it directly to the instruments can easily lead to blockages in the air pathways and corrosion of the seals. In mild cases, this results in inaccurate valve operation, while in severe cases, the valves may become stuck and stop functioning. A filter-regulator device helps to remove these impurities and maintain a stable air pressure. It is advisable to install a manual shut-off valve and a small pressure gauge on the gas supply pipeline; this allows for adjusting the pressure at any time during routine inspections, as well as enabling quick detection of leaks. For such outdoor installations, it is necessary to pay close attention to the rusting of the pipelines over time, and to drain any water that accumulates in the gas supply regularly; otherwise, rust deposits blocking the pipelines can cause problems. The specific corrective actions still need to be carried out in accordance with the factory’s safety regulations
Bro, your experience hits the nail on the head! During my previous inspections of the equipment area, I also encountered the problem of the absence of filter-pressure reducing valves; water and impurities in the air supply blocked the air pathways of the pneumatic shut-off valves, causing them to stick. It took a long time to remove these components and clean them, and it’s true that saving a little money ends up costing much more in the end. Here are two useful tips: First, when choosing a pressure reducing valve, make sure it is suitable for the pressure level of the air supply at the site; don’t just use one arbitrarily ； Secondly, it is advisable to include the inspection of the air source filtration and pressure reduction systems in the regular daily inspection checklist; draining accumulated water on a monthly basis can prevent many subsequent maintenance problems. We still need to pay close attention to the security details
Filtering is one aspect; the air source for the instruments is quite clean anyway, so it’s sufficient to perform regular drainings. The main issue is the excessive pressure; generally, the pressure for instrument air is maintained at 8 to 10 kilograms, while 4-5 kilograms is sufficient for valves. There’s no need for a pressure reducing valve, otherwise the valve cylinders won’t last long.
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