This document discusses modifications made to self-contained breathing apparatus (SCBA) to allow it to be used by two people. The project aims to increase the cylinder capacity from 30 minutes to 50 minutes to allow respiration for both a firefighter and a casualty. Additional components were added, including a second outlet hose, reducing valve, and face mask. This will enable quick connection to a suffocating casualty during an emergency to save their life without delay. Calculations show dual cylinder setup increases volume by 85% while reducing weight by 70%, extending duration to over 80 minutes.

2.  WORKING OF SCBA
 SCBA CHECKING
 APPLICATONS
 CALCULATIONS
 DIFFERENCE
 CONCLUSION
 ABSTRACT
 INTRODUCTION
 SOLAS
REGULATION ON
SCBA
 PARTS OF SCBA
 SNAPS

3.  Safety is the very important factor on onboard ship. Still many
accidents are happening onboard due to fire. SCBA FOR CASUALITY
is a device which is used by one person during the inspection of fire
location.
 Our project is modifying the SCBA cylinder and face mask for the
usage of two persons during emergency while fighting the fire SCBA
FOR CASUALITY is the firefighting equipment. It is used during fire
accident on-board. Now a days safety is most important in ship. Still
now SCBA FOR CASUALITY is used by only one person. But in our
project we are modifying the cylinder and equipment of SCBA FOR
CASUALITY for the respiration of two persons. The present cylinder
onboard has the capacity time of 30minutes.
 So we want to increase the size of cylinder for 50 minutes. The warning
alarm will be set before the 15 minutes of emptying the cylinder.


4.  As we know SCBA is used by one person at a time but in advanced
 SCBA we are increasing the capacity of the Cylinder and attaching one
more
 outlet hose, reducing valve and face mask with previous one it is used only
 during the time of emergency by the suffocating person struggling during
the fire The user will be able to describe important aspects of safety and
demonstrate practical application as it pertains to emergency service
provider
 operations from memory, without assistance, to an accuracy of 70% and
the instructor's satisfaction. The user will be able to identify the basic
functions and uses of properly donning of self-contained breathing
apparatus.

5.  For ship between 500-2500 tons minimum two sets are
required.
 For ship between 2500-4000 tons minimum three sets are
required.
 For ship 4000 tons and above minimum four sets are required.

6. SOLAS:
1)As per SOLAS regulation 2/10.10
SCBA should not be crossed over 19kg and should not less than 200 litters
2) NFPA
NATIONAL FIRE PROTECTION AND ASSOCIATION
3) NIOSH
NATIONAL INSTITUTE OF OCCUPATIONAL SAFTY AND
HEALTH

8. FACEPIECE OR HOOD
 The North face piece assembly has a four-point adjustable
head harness. The face piece standard seal has a blended shape to
ensure a proper fit. A standard inner-mask oral/nasal cup reduces
dead-air space and CO2 buildup
 The North Air Hood is also available for users that prefer
to wear their own eyeglasses or may have facial hair that may
interfere with the sealing surface. The sealing surface of the hood
is around the neck, and there may not be any hair or jewelry
interfering with the neck seal. The North Air Hood is NIOSH
approved for entry into an IDLIH atmosphere .
 The Air Hood has a hard visor with a permanent anti-fog coating
that offers excellent vision, an inner oral/nasal cup to reduce
CO2 build-up, and adjustable side straps for a comfortable fit.

9. COMPACT DEMAND VALVE
(CDV)
 The patented Compact Demand
Valve regulator combines high flow
with allow profile to improve
mobility .
 The CDV exhalation valve greatly
reduces breathing resistance which
allows for longer duration of
cylinder use. The CDV is easily
docked into the face piece using a
threaded hand wheel. An optional
first breath CDV is also available.

10. FIRST STAGE PRESSURE REDUCER
 Air leaves the cylinder, passes through a sintered
bronze filter in the hand wheel assembly, and then
continues on to the first-stage pressure reducer where it is
reduced to approximately 125 psi.
 The reducer is a simple piston type that requires no
adjustment and incorporates an automatic, self-seat- ing
pressure relief valve to protect the downstream low-
pressure components. It is made of high quality
aluminum and is securely mounted to the cylinder.

11.  .

12.  The cylinder consists of atmospheric air of 200 bar, 2516 lit,
8.6cub.ft. When the cylinder valve 5 open 200 bar pressure
from cylinder is passed through reducing valve.
 In reducing valve the 200 bar pressure is reduced to 4 bar and
is passed through syphon tube to reach face mask as air comes
to the facemask.
 The pressure of air will be 1 bar which is atmosphere air
pressure, as we are connecting additional buddy breather with
help of non return ball valve which is three way. Buddy
breather can be connected during the time of emergency to
save the casualty without delay. This is simple working of
SCBA 40 lit air issued for I minute Training.

13. DUARATION CALCULATION= VOLLUME (in litters) * PRUSSURE ( in Bars) - 10
40 lit
(i,e) 40 is representing human being inhales 40 lit of air per
minute
(i,e) 10 is representing 10 min before alarm for safety
margin

14. ALLUMINIUM ALLOY LINER WITH CARBON FIBER STEEL
DUARATION CALCULATION = 6.8 * 300 -10 DUARATION CALCULATION = 6 * 300 -10
40 40
= 41minutes =35minutes

15.  
Fit Checks
Fit checks are to be conducted during
initial selection and training, and
puts on a respirator before entering a
contaminated atmosphere.
Negative Pressure Fit Check:
1. 1 Close off the respirator inlet or
inhalation valve, using the palm of the hand
over the opening
2. Gently inhale to create a slight vacuum in
an attempt to cause a partial inward
collapse of the face piece.
.

16. 3. Maintain the vacuum inside the face
piece for at least 10 seconds.
4. If vacuum is not present rescuer
face piece seal and try again.
Positive Pressure Fit Check:
1. Close off exhalation valve and
exhale gently into the face piece.
2. The face fit is considered
satisfactory if a slight positive pressure
can be built up in side the face piece

17.  Inspect gauge for damage. Inspect cylinder for mechanical damage (cracks, dents,
gauges) or signs of heat or chemical damage "Guideline for Visual Inspection and at
Demand Valve 90 Requalification of Fiber Reinforced High Pressure Cylinders" for
all wrapped cylinders.)
 Check that hydrostatic test date on cylinder is current. Check that cylinder valve
threads are not damaged. Check that the valve body is not bent. Connect the CDV
to the FRONTIER face piece or hood by screwing the CDV hand wheel into the
hood or face piece. Make sure the manual red bypass knob is in the closed position,
i.e., fully turned clockwise. Open the cylinder valve slowly by turning the cylinder
valve knob counter-clockwise to the fully open position. Hold face piece tight to your
face.
 The whistle alarm should activate and then shut off. There should be no air flow
from the face piece. If air is flowing, check that bypass is closed. For the First
Breath CDV, inhale to activate airflow.

18. CONTENT STEEL (Single Cylinder) AALCF (Dual cylinders)
No. CYLINDER 1 2
WORKING (pr) 300 BAR 300 BAR
MAX (pr) 450 BAR 600 BAR
TESTED (pr) 600 BAR 950 BAR
LITTERS 1800 LIT 2030 LIT
WEIGHT (W.L) 10.8 KG 4.1 KG
( WITHOUT ) 5KG 3.9KG
TIMING 35 MIN 40.8+40.8=82MIN

19. PART
NUMBER
NORTH
CATALOG
NUMBER
PRESSURE
PSIG
MATERIAL
FREE
AIR
CAPACITY
NIOSH
RATED
DURATION
CYLINDER AND VALVE
CHARGED WEIGHT
HYDROSTATIC
INTERVEL
0.24.092
EN12245
HP
6500
ALLUMINIUM
ALLOY WITH
CORBON
FIBER 2400 LIT 40
8.818 LBS 8YEARS
0.24.037 9110301 LP 2216
AL 1287 LIT
30 15.9 LBS 5 YEARS
0.24..098 910302 HP 4500
HOOP ALLUMINIUM
1287LIT
30 15.9 LBS 3 YEARS
124002 910303
HP
4500
FULL CARBON
1287LIT 45 14.8 LBS 5 YEARS

20.  300 BAR working pressure
 Dual cylinder setup
 Dual hose setup (casualty +firefighting)
 70% Weight Reduced
 85% Volume Increased By Adding One Cylinder

21.  Enclosed space entry
 Fire fighting
 Casualty saving
 Hospital & Healthcare
 Under water diving Application
 Marine applications.

22.  Even the time of respiration for one person can be
increased. In this report, a design for SCBA FOR
CASUALITY, and the key functions, material used
,maintenance everything properly described. The
warning alarm will be set before the 15 minutes of
emptying the cylinder.
 This advanced self-contained breathing apparatus
consist of additional reducing valve demand valve
and mask, so, that while fighting the fire if a
person is suffocating, extra mask can be used to
save the person.
 Life can be saved
 Time can be saved