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16 Cards in this Set
- Front
- Back
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Purpose of a hose |
Move water from one place to another |
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Requirements of a good hose: |
Reliable to use Resistant to bursting, leaking, chemical damage Not stretch excssively when pressurised Light and easy to handle Smooth surface internally to keep friction to a minimum Capable of withstanding pressure change or shock |
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Types of hose |
Lay flat hoses- 45mm,70mm,90mm,150mm Hosereel hose Hard suction hose |
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Properties of lay flat hoses |
45mm and 70mm: usually red 23 m long Weight - 9kg (45mm) 15kg (70mm) Max working pressure 15 bars Flow rates: 130/230/300/400 @ 6bars 90mm Usually yellow 30 m long Weight - 23.5kg Max working pressure 15 bars
150mm Yellow 5m,10m, or 50m in length |
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Properties of hosereel and hard suction hose |
Hosereel: Stored in drums in side of appliance - used for water @ high pressure - internal diameter 19mm - 18.3 per length (4 lengths per drum on each side) - flow rate : 50, 100,150,200 @25 bar
Hard suction hose: Designed to withstand external atmospheric pressure Used from open water sources to pump - 2.44m length with a diameter of 100mm - 2 lengths carried on each appliance
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How many lengths of hose are kept on front line and reserve store |
FRONT LINE = 10 x 70mm, 4 x 45mm 2x hosrseel ( single appliance)
RESERVE STORE = 50% of front line |
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2 types of female instantaneous coupling and their use |
1 - two pill release spring loaded plungers - operates by external lugs 2 - single twist release spring loader plungers - operates by external lugs Use - |
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What is a coupling |
The fitting used in joining together two lengths of hose or any piece of equipment to the hose |
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What a ia instantaneous coupling |
Interlocking coupling on 45mm and 70mm lay flat hoses also known as quick release instantaneous coupling |
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Male coupling |
Single metal casting with lip that engages with the plunges of female coupling |
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Storz coupling |
Found on 90mm and 150mm hose Ingerlocming coupling con acted by using two storz spanners > match up log fit to slots > places spanners of collars > turn right spanner clockwise and left anticlockwise until red dots are aligned < to loose left spanner closest and right further away and turn |
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Hose identification |
On female coupling - colour coded bandit strap - yellow = southern Orange = eastern Green = western Black = training Diameter (1 digit) station call sign (3 digit) ID number (4 digit) |
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Rules to prevent damage |
1 - should be ramped when laid on the road 2 - should not be linked when jd or pressure 3 - should not be made up when froze n 4 - should be under-ru and keaned before stowing 45mm a x 70mm are Dutch rolled with female and Male coupling on outside together |
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Damaged hose |
Damaged - if small leak then can put a small damage on it - should be replaced by new length ASAP - if not mad eup immediately tio overhand knot in both end of the hose outside - China pencil marks the defect - if made up Male coupling should be in the middle and female on the outside - China pencil marks the defect - tied with string so it doesn't unravel - label should be on it to identify ID number, station number, details of defect - tied with string so it doesn't unravel - label should be on it to identify ID number, station number, details of defect |
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When to test |
On acceptance After operational use Annually |
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Clearly of hose |
Brass broom with cold water brushing sideways across the hose unless Oil/acid = warm soapy water then rush then cold water If contaminated gets sent away with label saying its contaminated |
