FAILURE MODES AND EFFECTS ANALYSIS TABLELa Vie Flats Water Distribution System

Components Functions Severity Occurrence

1. Pipelines

Project Title : LA VIE FLATS CONDOMINIUM BUILDINGLocation : FILINVEST CORPORATE CITY, ALABANG ZAPOTE ROAD, ALABANG, MUNTINLUPA CITY

Failure Modes

Cause of failure

Terms of Detection

Detection Rate

Effects of Failure to the System

Risk Priority Number

Suggested Actions to be

DoneActions Done

in the Site

a. 100 mm dia galvanized steel iron riser pipe (standard Schedule 40 ), CWLR-1

carries water from

underground reservoir to the elevated water tank

b. 75 mm dia galvanized steel downfeed (standard Schedule 40 ), CWLDF-1

conveys pressurized flow water

from hydropneumatic tank to branch lines in the 23rd

flr to 20th flr.

c. 100 mm dia galvanized steel downfeed (standard Schedule 40 ), CWLDF-2

conveys gravity flow water from

elevated water tank to branch lines

in the 19th flr to basement

level and drains the

water to the underground

reservoir.

d. 40 mm dia galvanized steel downfeed (standard Schedule 40 ), CWLDF-3

conveys pressurized flow water

from hydropneumatic tank to service hose bibb in the main pipe case in the 23rd flr to 20th flr.

e. 50 mm dia galvanized steel downfeed (standard Schedule 40 ), CWLDF-4

conveys gravity flow water from

elevated water tank to service hose bibb in the main pipe case in the 19th flr to basement

level.

f. 32 mm cross linked polyehtylene/aluminum/ polyethylene branch pipes

deliver water from the

downfeeds to the 2

bedrooms units in each

floor.

g. 25 mm cross linked polyehtylene/aluminum/ polyethylene branch pipes

delives water from the

downfeeds to the 1

bedroom units in each

floor.

h. push on types aluminum coated fittings

connect cross-linked

PE-Al-PE branch pipes

to one another and to change its direction of

flows.

2. Water Meter Assembly

a. 50 mm dia galvanized steel pipes (standard Schedule 40 )

feed the parallel

connection of water

meters and branch lines in the main pipe case.

b. 50 mm dia rising-stem type gate valves

shut-off the flow in the 50 mm dia

pipe in each floor.

c. 25 mm dia rising-stem type gate valves

isolate a branch line and provide shutting-off

of flow in the pipe.

d. 25 mm dia water meter

read the water flow rate that

been used in each units.

3. Hydropneumatic Tank Assembly

a. 550 US gallons stainless steel hydropneumatic tank (operating pressure: 35 - 55 psi)

supplies water to the units in the 23rd flr to 20th flr.

b. 75 mm dia pressure relief valve

installed in the

hydropneumatic tank to

avoid pressure to exceed 60

psi.

c. 7.5 hp booster pumps (Cap. = 150 gpm, TDH = 110 ft)

parallel pumps that push water

from elevated

water tank to the

hydropneumatic tank.

d. 75 mm dia rising-stem type gate valves

isolate the hydropneumatic tank and the booster pumps from the system and provide shutting-off

of flow.

e. 75 mm dia check valves

prevent a back flow of water from

the hydropneumatic tank to

the elevated tank.

f. Pump control box

controls the pump

performance in the

hydropneumatic tank system.

4. Elevated Cylindrical Water Tank

a. 3400 mm dia stainless steel water tank (cap = 15,000 gallons)

reservoir that supplies the

water demand in the whole

water distribution

system.

b. 100 mm dia equalizing valve

a gate valve that

equalizes the water level in

the two partitions of the elevated

tank.

c. 25 mm dia water level indicator

indicates the water level in

the water tank.

d. 75 mm dia galvanized iron overflow drain pipe

drains water that exceed

the allowable water level.

5. Pressure Reducing Valve Assembly

a. 75 mm Pressure Reducing Valve

parallel valves that reduces the pressure in

the downfeed to a minimum pressure of

20 psi to avoid failure

of fixture.

b. 75 mm dia wye strainer

provide drain of water and maintenance

in the pressure reducing

valve assembly.

c. 75 mm dia threaded rising-stem type gate valves

isolate the PRV's from the system

d. 100 mm dia rising-stem gate valve

shut-offs flow in the

100 mm dia downfeed in

the 10th floor

6. Pump Room Assembly

a. 25 hp submerssible pumps (cap = 160 gpm, TDH = 350 ft)

lift water from the

underground reservoir

tank to the elevated

water tank.

b. pump controllers

control the pump

performance in the

underground pump

assembly

c. 100 mm dia rising-stem type gate valves

isolates components and shut-off flow in the

underground pump

assembly from the system.

d. 100 mm dia float valves

shut-offs the flow from

the 100 mm dia meter downfeed (CWLDF-2) when the allowable

water level in the

underground reservoir.

e. 100 mm check valves

prevent back flowing of

water from the riser to

the submerssible

pump.