【Help】What should be the minimum pressure in the air reservoir of a respirator when it is in standby mode?
Thread Content
During recent fire safety inspections and inspections of major hazard sources, experts conducted a thorough examination of the air respirators, which are part of the on-site emergency equipment. One of the problems is that the pressure in many of the air supply cylinders is below 25 MPa, which is considered a potential hazard and requires rectification. In response to this, we searched for numerous ** and industry standards related to air respirators, and found that only the maximum filling pressure and the alarm pressure during use are explicitly specified; however, there are no clear requirements regarding the pressure in emergency standby mode. Of course, everyone knows that a backup system must be reliable, and therefore the pressure should be relatively high. However, in a backup setting where air respirators are checked frequently but used only occasionally, the pressure will still drop. Based on our practical experience, we keep cylinders with sufficient pressure on site, and it is specified that they should be replaced when the pressure drops below 20 MPa. Why is it necessary to replace it at pressures below 25 MPa? Moreover, I have seen some reports recently, with experts suggesting that replacement or refilling should be carried out when the pressure is below 24 MPa. Isn’t there a uniform rule? If there is no mandatory requirement, then it’s not okay to replace it when we decide on 20 megapascals on our own? Moreover, there are plenty of gas cylinders with sufficient pressure available on site. Could everyone help look for them? Is there any regulation regarding this? :handshake
This depends on the settings specified by the particular manufacturer of the air supply unit. Generally, the minimum pressure is set to ensure operation for a certain minimum period of time under normal conditions; if this requirement is not met, it is considered a risk, and the cylinder needs to be replaced promptly. Here, we configure the equipment based on the maximum number of team members. The pressure of the gas cylinders is checked regularly; if it falls below 24 Mpa, the cylinders need to be replaced promptly!
I also checked the relevant specifications just now, and indeed it’s not specified in such detail; from what I remember, it’s the requirements outlined in the manual. https://bbs.hcbbs.com/thread-3020343-1-1.html
The training air respirators used in daily training should be labeled and stored separately from those intended for combat use； Training with air respirators is not included in the inspection scope ； The combat-ready air supply units must always be kept at maximum pressure, clean, and in perfect condition. Every self-contained breathing apparatus is equipped with a pressure gauge; when the pressure needle is within the green range or above, it indicates a normal operational condition ； If the pressure gauge of the combat-ready air supply mask is below the green range, it should be refilled immediately; this measure should be included in the daily handover procedures.
Storing them in categories is a sensible approach; support!
So, whether it’s the time or the pressure, it should be determined based on one’s own actual situation. Since there are no clear regulations, experts should handle matters with caution and find ways to establish rules in order to bring control; they shouldn’t speak casually without any basis
In my personal opinion, experts may not necessarily know which standard it comes from; they simply judge based on common sense that what you are doing does not comply with the regulations. PS: Experts also need to eat; if they can’t find any problems, then what are they?
According to industry standards, we require a reserve pressure of between 25 and 30. If it is below 25, it needs to be topped up; generally, a pressure of 25 Mpa is sufficient to allow most people to use it for half an hour. The main goal is to ensure normal operation in emergency situations.
It’s right to ensure that the equipment is in a ready state. What bothers us a bit is that there were originally 10 spare air tanks, so why is someone punished just because one of them is in slightly poor condition? Just saying, to restore some balance: lol