Transcript Continued

Essentials of Fire Fighting,
5th Edition
Chapter 13 — Fire Hose
Firefighter II
Chapter 13 Lesson Goal
• After completing this lesson, the
student shall be able to use various
hose appliances and tools, prepare a
test site for service testing, and service
test fire hose following the policies and
procedures set forth by the authority
having jurisdiction.
Firefighter II
13–1
Specific Objectives
1. Describe the characteristics of hose
appliances and tools.
2. Explain service testing fire hose.
3. Discuss test site preparation for
service testing fire hose.
(Continued)
Firefighter II
13–2
Specific Objectives
4. List equipment necessary to service
test fire hose.
5. Explain the service test procedure.
6. Service test fire hose. (Skill Sheet 13II-1)
Firefighter II
13–3
Hose Appliances
• Any piece of hardware used with fire
hose to deliver water
(Continued)
Firefighter II
13–4
Hose Appliances
• Valves
– Control flow of water in hoselines,
at hydrants, at pumpers
– Ball valves
– Gate valves
– Butterfly valves
– Clapper valves
(Continued)
Firefighter II
13–5
Hose Appliances
• Valve devices
– Allow number of
hoselines operating
on fire ground to be
increased/decreased
– Wye appliances
– Siamese appliances
(Continued)
Firefighter II
13–6
Hose Appliances
• Valve devices
– Water thief appliances
– Large-diameter hose
appliances
– Hydrant valves
(Continued)
Firefighter II
13–7
DISCUSSION QUESTION
What are some other names for hydrant
valves?
Firefighter II
13–8
Hose Appliances
• Fittings
(Continued)
Firefighter II
13–9
Hose Appliances
• Intake strainers
– Devices attached to
drafting end of hard
intake to keep
debris from entering
fire pump
– Guidelines for use
Firefighter II
13–10
Hose Tools
• Hose roller
– Prevents damage to
hose that can occur
when dragged over
sharp corners such
as roof edges,
windowsills
(Continued)
Firefighter II
13–11
Hose Tools
• Hose roller
– Consists of metal frame with two or more
rollers
– Can be used for protecting rope from
similar edges
(Continued)
Firefighter II
13–12
Hose Tools
• Hose jacket
– Can be installed on ruptured section of
hoseline to temporarily close rupture
(Continued)
Firefighter II
13–13
Hose Tools
• Hose jacket
– Consists of hinged two-piece metal cylinder
– Made in two sizes
– Encloses hose so can operate at full power
– Can be used to connect mismatched hose
(Continued)
Firefighter II
13–14
Hose Tools
• Hose clamp
– Can be used to stop flow of water in
hoseline
(Continued)
Firefighter II
13–15
Hose Tools
• Hose clamp
– Three types — Screw-down, press-down,
hydraulic press
– Can injure firefighters/damage hose
– Several general rules for use
(Continued)
Firefighter II
13–16
Hose Tools
• Spanner
– Used to tighten/loosen couplings
– May have other built-in features
(Continued)
Firefighter II
13–17
Hose Tools
• Hydrant wrench
– Used to remove caps from hydrant outlets,
open hydrant valves
– Equipped with pentagonal opening fitting
most standard hydrant operating nuts
– May be equipped with spanner
(Continued)
Firefighter II
13–18
Hose Tools
• Rubber mallet — Strike lugs to
tighten/loosen couplings
• Hose bridge/ramp
– Help prevent damage to hose
– Should be used where hose laid across
street
(Continued)
Firefighter II
13–19
Hose Tools
• Hose bridge/ramp
– Can be positioned
over small spills
– Can be used as
chafing blocks
(Continued)
Firefighter II
13–20
Hose Tools
• Chafing blocks
– Used to protect fire hose where subjected
to rubbing from vibrations
– Useful where intake hose comes in contact
with pavement
– May be wood, leather, old truck tires (Continued)
Firefighter II
13–21
Hose Tools
• Hose strap, hose rope,
hose chain
– Used to carry, pull fire
hose
– Provide more secure
means to handle
pressurized hose when
applying water
Firefighter II
13–22
Acceptance Testing Hose
• Performed by manufacturer before hose
shipped
• Relatively rigorous
• Subjects hose to pressures much higher
than anticipated in field
• Should not be attempted by fire
department personnel
Firefighter II
13–23
Service Testing Hose
• Performed periodically to ensure hose
still capable of performing as required
• Should be performed according to
NFPA® 1962 guidelines
• May be done by private contractors/fire
department personnel
(Continued)
Firefighter II
13–24
Service Testing Hose
• Should be done after being repaired,
after being run over by vehicle
• Before testing, examine for
– Excessive wear/damage to jacket
– Coupling damage
– Missing gaskets
Firefighter II
13–25
Preparing Site for Service
Testing
• Hose should be tested in paved or
grassy area or level ground
• Site should be protected from vehicular
traffic
(Continued)
Firefighter II
13–26
Preparing Site for Service
Testing
• If nighttime, area should be well lit
• Test area should be smooth, free from
rock, debris
• Slight grade to facilitate draining of
water helpful
• Water source should be sufficient for
filling hose
Firefighter II
13–27
Equipment Needed to Service
Test Hose
• Hose testing machine, portable pump,
fire department pumper equipped with
gauges certified as accurate
• Hose test gate valve
• Means of recording hose numbers, test
results
(Continued)
Firefighter II
13–28
Equipment Needed to Service
Test Hose
• Tags/other means to identify sections
that fail
• Nozzles with shutoff valves
• Means of marking each length with year
of test
Firefighter II
13–29
Service Test Procedure
• Exercise care when
working with hose
• Use specially designed
hose test gate valve to
prevent hose rupture
(Continued)
Firefighter II
13–30
DISCUSSION QUESTION
What protective gear should be worn
when operating pressurized hose?
Firefighter II
13–31
Service Test Procedure
• When using fire department pumper,
connect hose to discharges on side of
apparatus opposite pump panel
• Close all valves slowly to prevent water
hammer
• Test lengths of hose should not exceed
300 feet (100 m)
(Continued)
Firefighter II
13–32
Service Test Procedure
• Laying large-diameter hose flat on
ground before charging helps prevent
unnecessary wear at edges
• Stand away from discharge valve
connection when charging
(Continued)
Firefighter II
13–33
Service Test Procedure
• Keep hose testing area as dry as
possible when filling, discharging air
from hose
• During testing, this air aids in detecting
minor leaks around couplings
Firefighter II
13–34
Summary
• To fight fires safely and effectively,
firefighters must know the capabilities
and limitations of the various types of
fire hose and the various kinds of hose
appliances that will be used on the
fireground.
(Continued)
Firefighter II
13–35
Summary
• Firefighters must also know how to
maintain and test fire hose.
Firefighter II
13–36
Review Questions
1. What are the following valves used
for: ball valves, gate valves, butterfly
valves, and clapper valves?
2. What are wye appliances and siamese
appliances?
3. What is a hose clamp used for?
(Continued)
Firefighter II
13–37
Review Questions
4. What are the two types of tests for
fire hose?
5. What equipment is needed to service
test hose?
Firefighter II
13–38