Hydrostatic Pressure Testing of Fire Extinguisher | Health and Safety


Hydrostatic Pressure Testing of Fire Extinguisher | Health and Safety

We are going discuss hydrostatic test of stored pressure type fire extinguisher what you're going to see full hydrostatic test here, we wanted to give you guys a little bit of idea on how that works whether you are a fire equipment distributor or an end-user. 

First, you need to take the extinguisher apart, then get the top off and then go ahead and clean off the tube then clean out the head of the extinguisher you can see there's a lot of foreign matter and dust particles and things inside, blow all that out, run a nylon brush through and then check that valve stem and the spring and make sure that everything is in good working condition. remember that the only difference between six-year care down and the hydrostatic test is simply that you need to fill that shelf full of water you need to pressurize it to three times its operating pressure and a hydrostatic test you need to record all that as opposed is just doing an internal examination and external examination of the extinguisher, make sure that there's nothing inside there as that valve stem goes inside of his head you can see it's very clean after you worked it over you want that bounce them to heat inside there perfectly, put a little bit of a lube on that valve stem, put that all back together and set that to the side and empty that extinguisher out.

Next, remember that you should only deal with doing an internal examination or a hydrostatic test on a fire extinguisher if you are certified inspector and have been trained to do so. we're going to move into the hydrostatic testing, hereafter you get that emptied out as you can see there’s usually a lot of dust leftover check the inside of that cylinder, make sure there's no dents, rust any caked in dry chemical ABC here it moved on and you filling up the fire extinguisher with water, go ahead and top it off with water before, actually put it into the hydrostatic testing hand pump when you do so you're going to be pumping that to three times the operating pressure as printed on the shell as you can see there is a hand pump provided on equipment, now put that quick the coupler on top of that fire extinguisher and top it off with water and then test it to three times the operating pressure you have to let that hold for one minute and it has to hold within 1% of the total test pressure here you invert the fire extinguisher to get rid of that water taking off the test plug and now you are going to go ahead and you are going to take down all the information, check the shell diameter and go check the height and record the information the height, the diameter. 

You can add the test pressure and every day that machine has to be tested to do specifications to make sure that gauges are all calibrated and in good working condition after that make the cylinder dry fill the extinguisher within a tenth of ten pounds of ABC dry chemical after you get done, go ahead and put this extinguisher back together you know run a brush around to make sure that when you get that head back on it get a good old ring seal and that O-ring on that head it's should be lubed up good and right here you can also see it's got a service collar this is going to provide sufficient evidence that there has been a service done on that fire extinguisher places it in the clamp here and put a recharging adapter in hook dry nitrogen up to that, recharge adapter opening it up and then going to go ahead pressurizes to 195 psi or whatever the psi is on that specific fire extinguisher. many different fire extinguishers are pressurized 100 psi or 200 and above depending on the type and last but not least you need to wipe it down make sure that it's in really good condition, get the hose cleaned off and you can apply a little bit of lube around there and then you can see due to some of the contents that would keep all the different parts of materials and finish it off by cleaning the house and then attach that hose back to that fire extinguisher again we appreciate everybody that takes time to view these article one of the last things that you are doing here is in addition to that service collar, throw on a hydrostatic test tag and punch the test pressure you're going to punch the date and the month in and go ahead and make your sign that after you are done with this fire extinguisher hydrostatic test.

Thanks for reading this article and please visit our blog site (https://healthsafetyknowledge.blogspot.com/) for more information.

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