empty box
tonight we're going to discuss two types of
hose protection one's a sleeve that slides over the entire hose the other one is actually
a wrap that wraps around the hose the sleeve will also protect the hose but it also protects
operators and machinery from hose bursts and oil jets so the sleeve
is designed to fit
over a hose like this assembly here
this will contain the oil it won't keep the oil in if there's a burst but it will
reduce the velocity and jets you know and just let the oil ooze out through the weave
the other product is what's called a hose wrap
it's a much harder product it's more for hose protection and abrasion protection
for a hose it won't actually protect operators and machinery from hose bursts but it gives
the hose a longer life and a lot of abrasion resistance it also makes the hose a lot slippery
a lot slipperier yeah it's got a harder coating and it allows things to actually slide over things
a lot better so we'll show you how these are fitted onto the hose and we'll describe the um
tricks and techniques to get these to fit nicely and properly onto the hoses moving on down here
so we've selected the right size of sleeve that will fit over the hose fittings
if you go too big it causes creasing when you try and crimp
if you go too small it just causes difficulty in actually pushing it on these are aluminium
shells that will actually crimp or will squeeze onto the each end of the hose fitting
to hold this sleeve in place now what's its main purpose main purpose is
if for some reason this hose fails under high pressure instead of a jet squirting out
and either hitting someone in the face or if someone's hand is close by or someone's arms close
by under pressure it will actually penetrate the skin and once it penetrates into the skin and into
the body you then need surgery yeah you need to go to the hospital and they'll actually cut you open
and they will leave it open for a few hours with some special absorbent pads
that will then close it up leave it for 24 hours and then come back 24 hours later cut it back
open again and then check again if there's any oil still left in it it's really really dangerous yeah
so what's this meant to do it's it's pretty much
mandatory on most construction sites now and most mining sites in australia
what it basically does is
the injection so instead of this you know being a very high pressure high velocity jet
it will fill this whole bag if you like with oil and then it'll just weep out rather than
shoot out under high velocity so anyway let's assemble one
this products made from high density polyethylene yeah great abrasion resistance
uv resistance also has mhsa certification which is mine safety health association certification
anyway let's um make a piece let's cut a piece and let's we'll show you
some of the tricks and tips to do this right so we're preparing some text style sleeve for a hose
once we've cut the hose we need to actually stop the ends from fraying so we just burn it a little
bit to melt the weave so it doesn't continue to fray we've got these aluminium tubes or
sleeves as we call them or ferrules aluminium ferrules you know that we specifically had sized
to fit nice and neatly over the hose fitting and the hose sleeve so what i'm doing now
is slowly lining up one end and sliding the sleeves on they can be a bit tight to get on
the issue is you've got to allow a little bit of slack in the sleeve
for when the hose actually bends so what i'm feeling for now is where the actual hose
fitting finishes and the thread starts and then i'll actually cut it to give me some
room shells we line up the shells over the sleeve so it's nice and tidy and then we crimp
the shell onto the sleeve quite firmly so it actually it's quite a tight neat assembly
we do the same with the other end what i'm trying to show here is
that as you bend the hose the sleeve actually shortens and pulls back
so we need to allow for that pull back when the hose is bending
that's why the when the hose is straight it looks a bit the sleeves looks a bit wrinkly on the
hose you can see it's a bit fiddly and i'm a bit fussy so i'm continuously trimming
and stuffing around but things need to look good if people are paying for stuff
so that's it that's one hose assembly done this will prevent jets and sprays and will convert
jets and sprays into just an ooze through the um the weave
another form of hose protection is a nylon wrap
or spiral safety guard some people even call it pig's tail
it's a product
empty box so it's made in different sizes this hose outside diameter is 22 millimeters
let's have a quick look at the 25
all right 35 will work
so this product is
is manufactured from extruded uh polyethylene material
good for temperatures from minus 40 up to 138 degrees yeah um glycol resistance oil resistant
and even phosphate ester resistant so the biggest issue you have with this product is wrapping it
onto the hose and estimating the length you need without wasting the length onto something on a
short piece of hose like this you could probably start at one end and then just actually use what's
required but on longer links where it becomes a little more unwieldy and unmanageable
you've got to actually cut this product because this comes in 20 meter lengths
manhandling a 20 meter length of this product around say a three
meter length of hose is not much fun so we've we've found as a general rule that
if you measure the hose length and then multiply it by 1.2 you can then work out
quite accurately we found how much of this wrap you're going to need
if we look at this length here this 100 length
is about 54 millimeters 54 centimeters sorry so 54 centimeters
times 1.2 what's 54 times 1.2 billion do the math do the math
so about 64 65 centimeters so it cut this at 65 centimeters and see what it looks like
let's give me that yellow 10 steps there
so there's about 65 centimeters
so that's free length all right because this this product will actually stretch and carry on so it's
quite difficult to start right at the beginning so the best place to start is back 100 or so
centimeter millimeters from the end or four inches back from the end you just rotate it on
if it's too long you can actually wind it down
and then you hum it's like a spring really
so you have minimal wastage and you've got a nice
so the beauty of this product is it provides additional protection to the hose
but it also makes it extremely slippery so rubbing on other hoses
rubbing on other hoses wrapped in this product there's a lot less friction and a lot less wear
so again available in many sizes depending on the hose length
you