Sprinkler Drops
Patent #6,811,130
and other patents pending
Save time! Save labor! Save money!
FINALLY, THE ADVANCED FLEXLINE SYSTEM.
EASYFLEX Sprinkler Drops.
Simply Irresistible!
Stop worrying.
Stop spending.
and start installing.
Corrugated stainless steel flexline was first utilized to
protect from earthquake damage. In spite of vibrations,
corrugated stainless steel pipe helps to prevent
ruptures in the plumbing system. It can withstand wide
fluctuations in temperature, and due to its flexible
nature is extremely reliable and resistant to abusive
environmental conditions.
Now, corrugated stainless steel flexlines are used in
a wide variety of industrial and residential plumbing
applications worldwide
KOFULSO Co., Ltd. is an world class manufacturer of
corrugated stainless steel flexline using AISI 304 and
AISI 316L stainless steel. It is a technological innovator
in a wide variety of applications, including water and gas
lines, which utilize our unique flexibility and can simply
be bent by hand.
KOFULSO Co., Ltd. is an ISO 9001 certified manufacturer
which has passed stringent UL testing for flexible fire
sprinkler drops. A full line of UL Listed and FM approved
flexible fire sprinkler drops are also availa le.
EASYFLEX innovative features save time and money for
you and your customers. Now favored worldwide by
contractors and fire protection engineers.
EASYFLEX sprinkler drops are the products of choice for
those who used to install conventional rigid pipe
sprinkler drops. The ease of installation and significantly
reduced labor costs utilizing flexible sprinkler drops
make EASYFLEX the smart choice.
Cleanroom Ceilings
Simplicity
Installation is quick & easy.
Configuration or relocation of previously existing sprinkler
systems is simplified.
Eliminates labor and time of intensive cutting, threading and
measuring of hard pipe.
Varieties of EASYFLEX lengths give you comfort choices.
Flexibility
The minimum bending radius is 3"(76mm), so EASYFLEX can
be installed easily in narrow or confined spaces.
Allows you to easily adjust to last minute changes in blue
prints or construction obstacles.
Profitability
Reduce time needed to determining the placement of
the sprinkler head in the center-of-tile.
Install 4 EASYFLEX Sprinkler Drops in the time it takes
only one hard pipe armover sprinkler drop.
Fewer people needed to install EASYFLEX compared to
hard pipe installations.
Simplify and streamline your present labor force. Work more
jobs utilizing your same work force since less people and time
are needed installing EASYFLEX.
Safety
Corrugated tube is made of AISI 304, AISI 316 and AISI 316L
stainless steel. Extremely flexible with a high tensile strength.
Braided flexible sprinkler drops are wrapped with a AISI 304
wire and can withstand high pressure.
Tube connectors are made by brass and rupture pressure is
over 1,420 psi.
An EPDM packing is used in the connector to prevent leakage
and withstand high pressure. It has excellent thermal resistance.
EASYFLEX Sprinkler Drops are 100% factory tested and ready for
installation.
100% non corrosive.
Exhaust Ducts
Introduction
EASYFLEX Sprinkler Drops are designed to significantly reduce labor and installation costs. Available in 5 different lengths with either a
1/2" or 3/4" NPT on reducer thread. EASYFLEX has been tested and listed by Underwriters Laboratories and approved by FM, United
States and Canada, per NFPA 13, 13R & 13D, as well as UL 1474 standards for safety regarding, but not limited to, pressure cycling,
corrosion resistance, flow characteristics, vibration resistance, leakage, and mechanical as well as hydrostatic strength.
EASYFLEX is an active member of AFSA, NFPA and NFSA.
Physical Data
Technical Feature
Fitting Type
Temperature Rating : Maximum temperature : 300 F(149 C)
Pressure :
- Maximum Working Pressure : 175 psi / 1206kPa
- Test Pressure : 1000 psi / 6875kPa (burst)
Connection :
- To Branch Line (lnlet) : 1”NPT male thread.
- To Splinkler Head (Outlet) : 1/2” or 3/4” NPT female thread.
Minimum bend radius : 3”(76mm). Do not bend within
2 1/2” from connection nut.
Maximum number of bends per flexible tube : 3
Inlet
1
N
P
T
Outlet
1/2”NPT
3/4”NPT
EFU - Unbraided Type
EFB - Braided Type
Model No.
Length Inch / mm
Pieces / case
EFU/EFB 224
24.0 / 610
20
EFU/EFB 231
31.0 / 787
20
EFU/EFB 236
36.0 / 914
20
EFU/EFB 248
48.0 / 1219
20
EFU/EFB 260
60.0 / 1524
10
EFU/EFB 275
75.0 / 1905
10
EFU/EFB 324
24.0 / 610
20
EFU/EFB 331
31.0 / 787
20
EFU/EFB 336
36.0 / 914
20
EFU/EFB 348
48.0 / 1219
20
EFU/EFB 360
60.0 / 1524
10
EFU/EFB 375
75.0 / 1905
10
Optional 80" and 106" lengths are available upon request.
Maximum Working Pressure : 500psi(3,450kPa)
SNAP CLAMP TYPE
Parts Included
No
Description
1
Flexible Tube
(Corrugated)
2
Nipple(Inlet)
3
Nut
4
Reducing(Outlet)
5
Isolation Ring
6
Gasket
7
Snap Clamp
8
T-barbracket (TBL or TBS)
9
Stock Bar
PARTS
REDUCER
#RD12
#RD34
SNAP CLAMP
#SSB01
GridDropBracket
#GSB24
NIPPLE
#LRD12
#LRD34
WING CLAMP
# SSBW01
METAL STUD
#MSB03
#RD1
#RN6
#RN9
BOLT CLAMP
STOCK BAR
#SQ25
#SQ30
#TBL02
GASKET
#SQ50
#NP114
#NP34
#EBS01
#EBL02
#NP1
T-BAR BRACKET
#TBS01
#SBB03
#RN7 #RN8
#RN10
#GR01
ISOLATION RING
#PR01
Installation
UNBRAIDED
FLEXIBLE PIPE
BRAIDED
FLEXIBLE PIPE
Commercial- Snap Clamp Type
Secure the end brackets to the
T-Bar with the butterfly Bolt.
Grip the end brackets and set them on the T-Bar with the protrusion
part to the outside of the T-Bar.
Connect EASYFLEX to branch line.
Press the lever of the end brackets to latch firmly with both
levers facing each other.
To adjust level of the reducer
with the ceiling tile, move the
reducer vertically, and push the
latch down firmly to secure into
position.
Please Compare with other Mounting Brackets and
save at least 30% of Installation Time
vs. RIGID PIPE
Variety size of
reducers
(Upright type)
Hard Pipe
Multiple pipe cutting
Slow installation
Corrosive
Complicated assembly
Traditional
hard-pipe reduce
(Upright type)
No pipe cutting or less time consume
Fast installation
100% non corrosive
Simplified work
Description
EASYFLEX
Hard Pipe
Remarks
Material
AISI 304
SS 41
EASYFLEX is 100% corrosion free
No. of Connectors
4 Parts
7 Parts
Less risk of leakage
Life Span
120 years
60 years
Theoretical life span
Installation in
retrofit areas
Easy and simple to work
Impossible or hard to work
EASYFLEX is easy to bend
Vibration
Excellent vibration
absorption
Weak
Excellent for
earthquake areas
Installation
Quick and easy to install
Labor and time intensive
4 times quicker than
Hard Pipe installation
Economics
Material cost is slightly higher, but
installation and labor costs are much lower.
Material cost is low, but installaton
and labor costs are much higher.
Total cost is about 40%
lower than the Hard Pipe.
Friction Loss Data and Specifications
Outlet EASYFLEX
Size Model#
EFU/B224
1 EFU/B231
/ EFU/B236
2 EFU/B248
EFU/B260
EFU/B275
Tube Assembly Length
2ft(0.6m)
2.6ft(0.8m)
3ft(0.9m)
4ft(1.2m)
5ft(1.5m)
6.3ft(1.9m)
Equivalent Length of 1
schedule #40 pipe
8.5ft(2.6m)
8.9ft(2.7m)
13.8ft(4.2m)
16.5ft(5.0m)
20.5ft(6.2m)
24.8ft(7.6m)
Maximum Rated
Pressure
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
Outlet EASYFLEX
Size Model#
EFU/B324
3 EFU/B331
/ EFU/B336
4 EFU/B348
EFU/B360
EFU/B375
Tube Assembly Length
2ft(0.6m)
2.6ft(0.8m)
3ft(0.9m)
4ft(1.2m)
5ft(1.5m)
6.3ft(1.9m)
Equivalent Length of 1
schedule #40 pipe
6.5ft(2.0m)
7.5ft(2.3m)
8.9ft(2.7m)
12.6ft(3.8m)
16.8ft(5.1m)
20.5ft(6.2m)
Maximum Rated
Pressure
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
175psi(1205kPa)
PERFORMANCE
No
Description
1
Hydrostatic
Pressure Test
No signs of distortion or leakage in hydrostatic pressure of five
times the rated working pressure of 175psi(1,205kPa) to
875psi(6,030kPa) for one minute while filled with water.
PASSED
2
Vibration Test
No signs of leakage, distortion or change in length with pressure
of 175psig(1.21MPa) and vibrated for 60 hours. The amplitude is 0.04in.
(1.02 mm) and the frequency from 18 and 37hertz, and
hydrostatic pressure test at 500 psig following each mode of vibration.
PASSED
3
Friction Loss
(Equivalent
Length of Pipe)
The water pressure is at 7psig(0.048mPa) and then varied in
5psig(0.035mPa) increments over the range of 10 psig(0.069mPa)
through 100psig(0.69mPa). The friction loss shall be equated to
the length of 1-in. Schedule 40 pipe using the values averaged.
PASSED
4
Water Hammer
Test
No signs of deterioration or leaking to 3,000 applications of
pressure surges from 50-500psig at a rate of 60 cycles per minute,
and Hydrostatic Pressure Test at 500psi (3.45 mPa).
PASSED
5
Mechanical
Strength Test
No signs of deformation, fracture, or leakage to torsional forces
of 60pound-feet (81N m) applied and to the Hydrostatic
Pressure Test at 175psi(1,205kPa).
PASSED
6
High Temperature
Test
No signs of distortion or leakage to the Hydrostatic Pressure Test
and then exposed to an ambient temperature from 325 to 375
(163 - 191 ) for 90 days and a hydrostatic pressure of 500 psig for one minute.
PASSED
7
Freezing Test
No signs of leakage to exposed to an atmosphere of minus
20
10 degrees F for 24 hours, and to the Hydrostatic Pressure Test
at 500psig(3.45mPa).
PASSED
8
Salt Spray Test
No exhibiting any incipient corrosion to an exposure to salt spray
atmosphere in accordance with ASTM B117-94 for 10 days .
PASSED
No
Description
1
2
Fatigue Test
Vibration Test
3
Pressure Cycling
Test
4
Vacuum Test
5
Friction Loss
(Equivalent
length of pipe)
6
Hydrostatic
Strength Test
7
High Pressure Flow
(Head Deployment)
Test Standard(UL 1474)
FM Global Testing -- Class Number 1637
The test is conducted in accordance with Section 8.3 of the ISO Standard 10380-1994.
A minimum of two hose assemblies shall be subjected to 50,000 cycles of repeated flexing at
a rate of 5 to 30 cycles/min at twice the minimum bend radius while pressurized to their rated
working pressure. The test samples shall show no signs of deterioration and be subject to the
Hydrostatic Strength Test.
PASSED
A sample assembly is secured to a vibration table with the end fitting in a vertical plan and the
hose bent 90 degrees at its minimum bend radius. The test sample will be filled with water and
pressurized to 90 psi (620kPa) while being subjected to the vibration conditions from 0.020 in.
(0.51mm) to 0.070 in. (1.78mm) total table stroke at 18 to 37 Hz for a 25-hour period. The
assembly shall show no signs of deterioration and be subject to the Hydrostatic Strength Test.
PASSED
The test sample shall be filled with water and bent 90 degrees with the threaded end fitting
restraind and the hose unrestrained on a flat surface at its minimum bend radius and
subjected to 20,000 cycles of pressure varying from 0 to 175 psi (0 to 1205 kPa) at a rate of
approximately 6 cycles per minute. The test samples show no signs of deterioration and
be subject to the Hydrostatic Strength Test.
PASSED
An assembly shall withstand a vacuum of 25 inHg (635 mmHg) for a period of five minutes,
during which time there shall be no collapse or leakage. The assembly shall show no signs of
deterioration of performance characteristics and be subject to the Hydrostatid Strength Test.
PASSED
Samples of each length shall be tested using the test apparatus for determining discharge PASSED
coeffcient (K-Factor). Flow measures shall be taken at 10 psi (70kPa) increments from 15 to
175 psi (105 to 1205 kPa) using an open sprinkler with a normal discharge coeffcient of K=5.6
or K=8.0 and with the sprinkler mounted to the sample. The average friction loss shall be
equated to the theoretical length of nominal 1-in. diameter Schedule 40 pipe, using a flow of 30
gal/min (155 L/min)
PASSED
A sample hose assembly shall withstand a hydrostatic pressure of four times the rated working
pressure of 175 psi (1205kPa) to 700 psi (4825kPa) for five minutes. The test samples shall
show no signs of rupture, cracking, permanent distortion, or deterioration of performance
characteristics.
PASSED
An assembly shall be fitted with a sprinkler and secured in a commercial ceiling frame
assembly. The sprinkler shall be operated using a suitable heat source. A minimum of seven
tests shall be conducted with pressures ranging from 10 psi to 175 psi (69 to 1206 kPa) in
approximately 30 psi (210 kPa) increments. The test sample shall show no signs of
deterioration or its attachment.
PASSED
Since 1989
www.kofulso.co.kr
www.kofulso.com
www.easyflexusa.com
KOFULSO Co., Ltd.
377-8 Gumgokdong Seogu
Incheon City 404-330 Korea
T:82 32 565 7753, 566 1974
SHANGHAI KOFULSO Co., Ltd.
852 Wuxing Nanqiao Zhen Fengxian
Qu Shanghai 201400 China
EASYFLEX Inc.
Tustin Business Park.
15011 Parkway Loop Unit G.
Tustin CA 92780-6522
KOFULSO JAPAN Co., Ltd.
3-2-14 Nanba-naka Naniwa-ku
Osaka Japan