|
|
BS 5306 PT 3:2009 - Is This The End Of Plastic Headcaps On Portable Fire Extinguishers?
BS 5306 part 3 revision 2009 has just been released, it contains some new guidelines regarding plastic head caps / operating valves on fire extinguishers.
Define Plastic Head Caps
Fire extinguisher head caps or operating valves are made from two types of materials, the first being metals such as brass, stainless steel and the second being plastics. Plastics come in a vast array of compounds and the best way to identify a plastic head cap is by deducing if it is not made of a metal then it must be plastic. Some head caps come with a metal retainer which secures the plastic head to the extinguisher body, these are still classified as plastic head caps.
Why has this standard introduced this schedule?
Plastics suffer from ultraviolet degradation, this is basically ultraviolet light which is a form of radiation. This radiation is produced by the sun and the strength and wavelength of the light, are UVA, UVB or UVC. Despite the relatively low percentage of UV radiation in the present solar spectrum, this is a very damaging radiation for plastics due to its high quantum energy content. This energy is capable of breaking down bonds within plastics, thus reducing its operational strength.
Are my extinguishers now not fit for purpose?
No this is not the case, unless the head cap has been coated so that any deterioration of the plastic can not seen (most common symptom is the whitening of a black head), then the head cap will only have to be replaced every time a extended service is carried out (normally every 5 years)
Do I need to replace existing head caps on the next routine inspection?
No this standard will mean within the next 5 years any extinguishers that requires a extended service should have a new head cap fitted.. This means if the extinguisher was refilled in 2008, the head cap is fit for service until 2013, unless its obviously damaged, suffering from UV deterioration or has been coated with a substance that will not allow the inspection of the head caps plastic make up, example would be over painting.
What happens if my extinguisher has been used and wants refilling?
The extinguisher can be refilled as long as the head cap condition is good. Refilling is not classified as an extended service.
Is there a major threat of injury or failure to operate correctly?
No if there was a major risk then the manufacturers would have to carry out a recall or replacement head service immediately, the risk is low and if there are no obvious signs of degradation e.g. whitening of the plastic, then the head should be fine.
What if I am told all my plastic headed extinguishers require replacing immediately?
I would recommend you get a second opinion as unless the extinguishers have suffered physical damage, UV damage, have heads that have been coated or have not been serviced every twelve months.
The Costs
If the cost of a head cap is more than £10 I would imagine the time a refill cost is added to this then you are probably better off replacing the whole extinguisher. Shop around the cost of extinguishers has fallen dramtically over the last few years, just remember buy a metal headed one as there are still plastic ones on the market. As a note if you are told replacement extinguishers are required ensure they have metal head caps to reduce your future service costs.
Points to note
Some heads that appear to be plastic are actually metal ones with plastic covers on them, since 1992 Chubb's Extinguishers have all had metal head caps on them. You can always ring the manufacturer if you want to confirm plastic or metal head caps.
There may be instances where the manufacturer will stipulate that their head caps do not have to be replaced until a certain age. The manufacturers instructions always supersede the BS Standard.
I have already been made aware that companies offering a all in service plan are now condemning plastic headed extinguishers, so that they do not brunt the cost of new head caps. Stand your ground and point out that they offered you the plan and that you expect them to honour their agreement.
Don't be afraid to ask for verification of what you are being told, we live in a world where service personnel get commission on a sale.
|
 |
Please Rate: |
|
Rating: |
 Processing ... |
(Average: Not rated) |
| Views: | 159 | |
|
| More Articles from Technology | | |
| Top Articles in Technology | | |
|
