Long-tube respirator
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This post was last edited by zhhx1898 on 2012-1-7 at 22:33. I would like to ask everyone, when is a long-term respirator generally needed? Thank you! Thank you all for your answers. I have one more question: are long-tube respirators used frequently by chemical plant operators? Which is more commonly used, it or an air respirator? Which one is cheaper? Thank you
It can be used for work inside containers or for tasks such as sandblasting, welding, and anti-corrosion work.
It is used for working in more hazardous areas; we generally employ it in areas where there may be a slight leak of methane. In the event of a large leak, positive-pressure respirators are used for repairs.
Feeding into enclosed spaces equipped with ventilation systems, and so on.
Long-tube air respirators and back-mounted air respirators are identical in terms of the mask and other components (the brand I use is even the same as that used for back-mounted respirators); the only difference is that one is powered directly by a gas cylinder, while the other relies on a gas cylinder set to supply air to the mask through a long tube. Therefore, there are no differences in terms of usage requirements. Through practical experience, long-tube air respirators can be used in the following situations: 1. When it is necessary to remain in an environment with toxic or harmful gases, or in a confined space where suffocation could occur, for an extended period of time, as back-mounted air respirators, due to the limited volume of their gas cylinders, can only be used for a short time. 2. The working space is narrow and limited; due to the direct connection of the air supply pipeline to the mask, long-tube SCBA is more popular among operators when working in confined spaces. Also, because long-tube air respirators are more convenient and easier to use, maintenance workers who work at relatively fixed locations on-site prefer to wear them; only those who need to move around frequently, those working in emergency situations, or those carrying out short-term tasks on-site have to use back-mounted air respirators. Note: Since users of long-tube SCBA often find it difficult to keep track of both the cylinder pressure and the condition of the air tubes, it is even more important for supervisors to pay close attention and ensure proper monitoring.
Reply to 1# zhhx1898: Our long-tube respirators use the same mask as SCBAs; the air supply source is optional. When using a long-tube respirator, there must be an air supply facility on site; it can be used for extended periods with minimal strain on the body ； An SCBA carries an air tank on its back; it’s bulky, has a limited usage time, and its cost is likely higher. I haven’t asked how much each tank of compressed air costs. I think it is generally used in environments where oxygen deficiency is possible; if it is certain that oxygen deficiency will not occur, a gas mask may be sufficient.
The situations in which long-tube respirators are used are essentially the same as those for air respirators, namely in operations in confined spaces where the space has not been ventilated or the ventilation is insufficient (that is, in situations where isolated protective equipment is necessary). Generally, long-tube respirators are relatively cheap, while air respirators are more expensive. However, air respirators are generally used in emergency situations, while long-tube respirators are usually not usable in such circumstances.
We stipulate that long-tube respirators cannot be used in enclosed spaces such as inside equipment, but only in areas where blind flanges need to be removed or installed, or in locations with low-pressure leaks. Long-tube respirators are much cheaper compared to air respirators. In terms of safety and reliability, air respirators are of course the better choice