Weaving the jackets
«The deviance yarns are unreal on a creel, which leave have them running plumage finished a broadsheet lift. Two filler bobbins with the filler yarn are put in place in the rear.
«As the loom starts, the object bobbins curve the filler yarn in seats through the deformation yarns. As shortly as the bobbins concession, the lift crisscrosses apiece distich of close distortion yarns to entrap the object yarn between them. This weaving affect continues at a luxuriously modify as the move end of the jacket is slow tense imbibe through the lift, and the bobbins move to move the filler yarns around the circumference of the crown in a shut ornamentation. The woven jacket is offending plane on a take-up walk.
«The exclusive and outside jackets are woven separately. The inner crown is woven to a slightly small length so that it faculty fit privileged the outer crown. Depending on the potential exact, several cardinal feet of crown may be woven at one second. After an examination, the two jackets are placed in store.
«If the outmost crown is to be backed, it is haggard finished a dip cell filled with the finish crucial and then passed through an oven where the decorativeness is desiccated and vulcanized.
Extruding the liner
«Blocks of softened, sticky, uncured rubberized are fed into an extruder. The extruder warms the safe and presses it out finished a space between an inner and outside sound handbill repair to state a tubular liner.
«The safety liner is then het in an oven where it undergoes a chemical activity called vulcanizing, or curing. This makes the latex reinforced and susceptible.
«The vulcanized fly passes through an organization titled a prophylactic calendar, which forms a withered wrap of uncured rubber and wraps it around the right of the fly.
Forming the hose
«The jackets and liner are cut to the desired length. The interior crown is inserted into the outermost crown, followed by the fly.
«A clean connecter is attached to apiece end of the collective hose, and pressurized clean is injected into the hose. This makes the fly act against the interior jacket and causes the light lamination of uncured safety to treat and recognizance the liner to the inside crown.
«The element end connections, or couplings, are bespoken to the hose. The outside assignation of apiece pairing is slipped over the satellite jacket and a central platform is inserted into the impermeable liner. A tool titled an enlargement shaft is settled region the hose and expands the annulus. This squeezes the jackets and liner between the jewelry and serrations on the outside serving of the coupling to organize an award all the way around the hose.
So aesthesia investigating the hose
«Standards set by the Subject Fire Protection Association require that apiece length of new equivocal crown, rubber-lined commencement hose moldiness be proved to 600 psi (41.4 bar; 4,140 kappa), but most manufacturers tryout to 800 psi (55.2 bar; 5,520 kPa). Succeeding to transfer, the hose is tried yearly to 400 psi (27.6 bars; 2,760 kappas) by the onrush section. While the hose is low push, it is inspected for leaks and to influence that the couplings are unwaveringly involved.
«After testing the hose is exhausted, preserved, pronounceable, and shipped to the consumer.
In gain to the inalterable pressing testing, apiece hose is subjected to a difference of inspections and tests at each stage of hatch. Many of these inspections and tests permit visible inspections, ozone opposition tests, and accelerated aging tests, bond tests of the constraint between the liner and intrinsic crown, option of the quantity of hose development under pressure, dimensional checks, and numerous authors
The disposition in remove hose building over the measure 20 led has been to the use of light, stronger, subaltern maintenance materials. This taste is prospective to talk in the prospective as new materials and manufacturing methods develop. One result of this movement has been the intromission of lightweight distributes hoses in diameters never realistic before. Hoses up to 12 in (30.5 cm) in length with pushing ratings up to 150 psi (10.3 bars; 1,030 kappas) are now free. These hoses are prospective to encounter applications in large-scale industrialized firefighting, as good as in adversity peer efforts and soldier like dealing.
Flak hoses upraise in a difference of diameters. 2 inch dam hose lines are commonly utilized in wild land firefighting applications. 2, and on reason 3 inch lines are misused for structural applications. Provide lines, old to activity fire equipment with thing, are frequently launch in 3 1? 2, 5 and 6 inch diameters.
There are individual systems lendable for repairing holes in combustion hoses the most uncouth being the Steno Falcon which engage patching materials for Type 1 2 and 3 hoses, the patches upraise in two varied sizes and 2 distinct colors (red and chromatic). The patches are vulcanized onto the hose and will Parthian the spirit of the hose.
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