1. SR-JOINT
AB-JOINT
Construction Catalogue 2014
SEOWON AUST PTYLTD

2. DRP SR-JOINT
DRP AB-JOINT What is DRP-JOINT?
2
What is DRP-JOINT?
Dual Ring Press Joint (DRP-JOINT) is a collective term that includes SR-
JOINT,AB-JOINT, SM-JOINT, CS-JOINT, CP-JOINT, and CN-JOINT, which
are differentiated by materials used to make their metal rings. DRP-JOINT
uses 360° circular pressing method to compress two rings, which consist of
rubber ring and metal ring. The outstanding performance of the circular
pressing method has been proven through tensile test and pressure-proof test,
leading DRP-JOINT to be used in building, ship, drill ship and generation plan
constructions and other fields for several years. Having been used in building
construction sector for more than 20 years, and for over 8 years in
the vessel sector starting from the firstAegis Destroyer of Korean Navy, DRP-
JOINT has received high recognition from customers.
SR-JOINT is the trademark of Seowon Aust PtyLtd.

3. 3
CONTENTS
• Structure
• Characteristics
• Cost-Saving Effect
• Application
• Products
• Certification
• Tools
• Installation guide
• Important Notes
• Clients
P4
P6
P9
P10
P11
P20
P28
P30
p34

4. 4
DRP SR-JOINT
DRP AB-JOINT STRUCTURE
SR-JOINT Sectional Detail
SR-JOINT PIPE
Stainless Ring
• Prevents joint from separating from pipe
• Safe from shock and vibration due to circular pressing method
Specifications Material
Stainless Pipe
KS D 3595, KS D 3576
SCH5/SCH10/SCH40
STS 304 TPD, STS 316
TPD
Stainless Ring KS D 3698, KS D 3705 STS 304-CP, STS 316-CP
Quality Certification
• Collective Standard Certification from KWWA
(SPS KWWA D 100-2-0719)
• Hygiene & Safety Standard Certification (KC)
from KWWA (KCW-2012-0059)

5. 5
DRP SR-JOINT
DRP AB-JOINT STRUCTURE
AB-JOINT Sectional Detail
AB-JOINT PIPE
Stainles s
Ring
Rubber
Ring
Stainless Ring
Rubber Ring
(Side View)
Wi ng
Rubber Ring
• Prevents fluid leakage from joint
• Durable for many years
Technical
Abbreviation
EPDM NBR FKM
Material Ethylene propylene Nitrile Butadiene Fluoro Elastomer
Operating
Temperature
Range
-40°C~120°C -25°C~100°C -25°C~200°C
Characteristics High resistance to
ozone, high durability,
and long heat
resistance life
(80 years at 80°C)
High resistance to heat,
ozone, wear; inferior
strength and flexibility
High resistance to high
temperatures, ozone,
wear, and chemicals
Application
Area
Portable water, cold &
hot water supply,
compressed air, water
drainage, water heating
system, fire sprinkler
Oil drain line Solar water heating,
fuels, mineral oil, oil-
free compressed air

6. 6
DRP SR-JOINT
DRP AB-JOINT CHARACTERISTICS
SHOCKPROOF STRUCTURE
Passed shock-proof test under the following
conditions:
• Pressure of fluid : 2.5 Mpa
• Amplitude of vibration : 1.16mm
• Frequency : 20Hz
• Duration : 168hr (7days)
• Number of total vibration : 500,000 times
(Tested on SM JOINT 15A)
SAFE FOR GROUND SUBSIDENCE
LOAD
LOAD
SM-JOINT
25A
SM-JOINT25A
Pressure of fluid: 25kgf/㎠
1,000 m m 1,000mm
DRP-JOINT passed the test for approval of tensile force of 15A 800kgf/㎠, 100A 6,000kgf/㎠
under the condition of fluid pressure 25kgf/㎠ which are designed specification. Test result
shows that there is no fluid leakage when being bent up to 22.28 degrees. It means DRP-
JOINT ensures safety against ground subsidence and/or earthquake.
ROTATION
360° ROTATE
WATER PRESSURE 25kgf/㎠
Rotation is possible in water pressure 25kgf/㎠.

7. 7
DRP SR-JOINT
DRP AB-JOINT CHARACTERISTICS
DRP JOINT CHARACTERISTICS
1. Environment-friendly Products
• Instead of welding, which has negative impact on the environment,
DRP-JOINT uses an environmental-friendly pressing tool for installation.
2. Hygienic Products
• DRP-JOINT uses the same stainless material used in food and medical
equipments, and therefore it is the most hygienic product.
3. Installation
• Installation does not require experienced workers. It takes 20 seconds
or less to press 1 point (based on 25A).
4. Wide Range of Choices
• Fittings are available in various sizes, including large size (100A).
5. Robustness
• Circular pressing of metal ring allows DRP-JOINT to maintain the same
pressure even after 360° rotation.
6. Safe from Vibration and Ground Subsidence
• DRP-JOINT successfully passed two-million vibration tests. It also pass
ed 22.28° bending test, which means that it is safe to bend the joint up t
o 22.28°, according to Korean Agency for Technology and Standards (K
ATS).

8. 8
DRP SR-JOINT
DRP AB-JOINT CHARACTERISTICS
PIPE INSERTION
PROTECTIVE CAP
• Prevents inflow of foreign substance into the pipe and protects from external shock
PRESSING FILM
• Visible to the naked eye before and after pressing
• After pressing and removing pressing film, it is easy to differentiate pressed part from
non-pressed part with the naked eye
PROTECTIVE CAP PRESSING
FILM
PRODUCT PIPE INSERTION PRESSING
REMOVE THE FILM
AFTER PRESSING
AFTER
PRESSING
BEFORE
PRESSING
REMOVE FILM CHECK

9. 9
DRP SR-JOINT
DRP AB-JOINT COST-SAVING
1,200,000
1,000,000
Projected Cost
800,000
600,000
400,000
200,000
0
PIPE JOINT LABOR TOTAL
SR – JOINT
STAINLESS WELD
TUBE WELD
TUBE
WELD
32%
SR –
JOINT
23%
STAINL
ESS
W ELD
45%
CLASSIFICATION SR – JOINT STAINLESS WELD TUBE WELD
PIPE 155,703 323,518 264,623
JOINT 117,209 86,028 74,348
LABOR COST 214,097 527,555 341,160
TOTAL 487,008 937,099 680,130
RATE 100 % 192 % 140 %

10. 10
DRP SR-JOINT
DRP AB-JOINT APPLICATION in High-Rise Residential & Commercial
STANDING PIPE LINE
DRAIN LINE

11. STANDARD ITEM
90˚ ELBOW
45˚ ELBOW
SOCKET
TEE
CAP
WATER TYPE TEE
WATER TYPE ELBOW
WATER TYPE SOCKET
WATER TYPE SOCKET
K-UNION
REDUCER
ADAPTER ELBOW (MALE)
ADAPTER ELBOW(FEMALE)
ADAPTER SOCKET(MALE)
ADAPTER
SOCKET (FEMALE)
SR FLANGE
ANCHORE SOCKET
WATER TEST CAP
SEOWON AUST PTY LTD 11

12. DRP SR-JOINT
DRP AB-JOINT STANDARD ITEMS
12
90˚ ELBOW 45˚ ELBOW SOCKET WATER TEST
CAP
TEE CAP WATER TYPE TEE WATER TYPE ELBOW
WATER TYPE SOCKET KU(K-UNION) REDUCER SR FLANGE
ADAPTER
ELBOW
(MALE)
ADAPTER
ELBOW
(FEMALE)
ADAPTER
SOCKET
(MALE)
ADAPTER
SOCKET
(FEMALE)
ANCHOR
SOCKET

13. DRP SR-JOINT
DRP AB-JOINT STANDARD ITEMS
13
45˚ ELBOW 90˚ ELBOW
SOCKET WATER TEST CAP
D L L1 L2 L3 TOLERANCE

14. 14
DRP SR-JOINT
DRP AB-JOINT STANDARD ITEMS
THREAD PS L L1 A
L L1 A1 A2 TOLERANCE(L)
TEE CAP
L L1 A1 A2 TOLERANCE
(L) A TOLERANCE(A) L TOLERANCE(L)
15X15 80 34 42 20 ±3
20X15 96 44 45 23 ±3
20X20 96 44 48 23 ±3
25X15 106 44 50 28 ±3
25X20 106 54 53 28 ±3
25X25 106 54 53 28 ±3
32X15 132 60 61 40 ±3
32X20 132 60 57 33 ±3
32X25 132 60 57 33 ±3
32X32 132 60 68 34 ±3
40X15 146 72 68 46 ±3
40X20 146 72 64 40 ±3
40X25 146 72 64 40 ±3
40X32 146 72 74 40 ±3
40X40 146 72 76 40 ±3
50X15 138 48 71 49 ±3
50X20 138 48 67 42 ±3
50X25 138 48 67 42 ±3
50X32 156 70 77 43 ±3
50X40 156 70 79 43 ±3
50X50 156 66 87 43 ±3
65X32 232 82 86 50 ±5
65X40 232 82 87 50 ±5
65X50 270 120 95 50 ±5
65X65 288 122 130 58 ±5
80X40 254 92 93 56 ±5
80X50 288 132 101 56 ±5
80X65 292 132 139 65 ±5
80X80 288 132 145 65 ±5
100X50 286 122 114 69 ±5
100X65 324 166 151 77 ±5
100X80 324 166 158 77 ±5
100X100 324 166 160 79 ±5
WATER TYPE TEE
THERAD P S L L1 A
15ⅹ ′′ ′′ 40 41 18
20ⅹ ’’ ′′ 48 45 23
20ⅹ ’’ ′′ 48 45 23
25ⅹ ’’ ′′ 53 48 28
25ⅹ ’’ ′′ 53 50 28
25ⅹ1’’ 1’’ 53 53 28
32ⅹ ’’ ′′ 66 52 33
40ⅹ ’’ ′′ 73 59 36
50ⅹ ’’ ′′ 69 62 24

15. 15
DRP SR-JOINT
DRP AB-JOINT STANDARD ITEMS
THREAD PS L1 L2 A
THREAD PS L1 L2 L1 L TOLERANCE
WATER TYPE ELBOW
THERAD PS L1 L2 A
15ⅹ ′′ ′′ 50 51 28
20ⅹ ’’ ′′ 60 56 35
20ⅹ ’’ ′′ 60 56 35
25ⅹ ’’ ′′ 69 64 44
25ⅹ ’’ ′′ 69 65 44
25ⅹ1’’ 1’’ 69 69 44
15ⅹ ’’(S) ′′ 55 27 31
20ⅹ ’’(S) ′′ 60 35 35
20ⅹ ’’(S) ′′ 58 30 33
WATER TYPE SOCKET K-UNION
THERAD PS L1 L2
15ⅹ ′′ ′′ 56 33
20ⅹ ’’ ′′ 61 34
20ⅹ ’’ ′′ 61 34
25ⅹ ’’ ′′ 62 35
25ⅹ ’’ ′′ 62 36
25ⅹ1’’ 1’’ 66 39
L1 L2 TOLERANCE
15ⅹ ′′ 75 116 ±3
20ⅹ ’’ 80 126 ±3
25ⅹ1 80 132 ±3
32ⅹ1’’ 90 145 ±3
32ⅹ ’’ 90 145 ±3
40ⅹ ’’ 90 149 ±3
40ⅹ ’’ 90 149 ±3
50ⅹ ’’ 90 155 ±3
50ⅹ2’’ 90 155 ±3

16. THREAD PT L1 L2 A
THREAD PT L1 L2 A
A L TOLERANCE
REDUCER ADAPTER ELBOW (MALE)
A L TOLERANCE(L)
20X15 20 68 ±3
25X15 37 86 ±3
25X20 19 70 ±3
32X15 43 101 ±3
32X20 36 97 ±3
32X25 27 88 ±3
40X15 52 113 ±3
40X20 45 108 ±3
40X25 47 109 ±3
40X32 32 104 ±3
50X15 64 131 ±3
50X20 57 127 ±3
50X25 54 124 ±3
50X32 51 131 ±3
50X40 28 116 ±3
65X32 113 221 ±5
65X40 113 222 ±5
65X50 113 230 ±5
80X40 113 195 ±5
80X50 113 237 ±5
80X65 106 274 ±5
100X50 126 219 ±5
100X65 135 289 ±5
100X80 135 295 ±5
THERAD PS L1 L2 A
15ⅹ ′′ ′′ 50 53 28
20ⅹ ’’ ′′ 60 63 35
25ⅹ1’’ ′′ 69 75 44
32ⅹ1 ’’ ′′ 88 84 54
40ⅹ1 ’’ ′′ 100 96 64
50ⅹ2’’ 2’’ 115 112 72
ADAPTER ELBOW (FEMALE)
THERAD PS L1 L2 A
15ⅹ ′′ ′′ 50 46 28
20ⅹ ′′ ′′ 60 55 35
25ⅹ1’’ ′′ 69 66 44
32ⅹ1 ’’ ′′ 88 78 54
40ⅹ1 ’’ ′′ 100 88 64
50ⅹ2’’ 2’’ 115 99 72

17. DRP SR-JOINT
DRP AB-JOINT STANDARD ITEMS
THREAD PT L1 L2 TOLERANCE(L) THREAD PT L1 L2 TOLERANCE(L)
ADAPTER SOCKET (MALE) ADAPTER SOCKET (FEMALE)
THERAD P S L1 L2 TOLERANCE(L) THERAD P S L1 L2 TOLERANCE(L)
15ⅹ ′′ ′′ 61 37 ±3 15ⅹ ′′ ′′ 52 29 ±3
20ⅹ ’’ ′′ 67 41 ±3 20ⅹ ’’ ′′ 57 31 ±3
25ⅹ1’’ ′′ 70 44 ±3
32ⅹ1 ’’ ′′ 82 47 ±3
40ⅹ1 ’’ ′′ 85 49 ±3
50ⅹ2’’ 2’’ 100 56 ±3
25ⅹ1’’ ′′ 59 33 ±3
32ⅹ1 ’’ ′′ 73 37 ±3
40ⅹ1 ’’ ′′ 74 37 ±3
50ⅹ2’’ 2’’ 85 40 ±3
SR FLANGE ANCHOR SOCKET

18. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
20
HOT AGING TEST HEAT RESISTANCE TEST
BRITTLENESS TEMPERATURE
TEST (-40℃)
BRITTLENESS TEMPERATURE TEST

19. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
21
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20. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
22
VACUUM TEST
RESISTANCE TEST TO AXIAL FORCE

21. 23
DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
LIMIT PRESSURE TEST OF JUNCTIONS
VIBRATION TEST BENDING TEST

22. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
24
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23. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
25
STRENGTH TEST
NEUTRAL SALT SPRAY TEST
FIRE PROTECTING TEST

24. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
•h ··r
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25. DRP SR-JOINT
DRP AB-JOINT CERTIFICATION
27
ABS (U.S.A) DNV
(NORWAY)
BV
(FRANCE)
GL
(GERMANY)
LR (ENGLAND) NK (JAPAN)KR (KOREA)

26. DRP SR-JOINT
DRP AB-JOINT TOOLS
28
GUN CLAMP BATTERY CHARGER
1 1 2 1
Gun-Type Tools
SR-JOINT Tools
CLAMP COMBINATION PIN
MANUALLY RETURN
BUTTON
K CLAMP(S,M) K JAW(15A~60A) COMBINATION
S : SMALL / M : MEDIUM
AB-JOINT Tools
F CLAMP(S,M) F JAW(15A~100A) COMBINATION
Clamp is not compatible.
Gun-Type Tool Components
JAW Box Gun Box
15 20 25 32 40 50
1 1 1 1 1 1
Checking jig is included

27. DRP SR-JOINT
DRP AB-JOINT TOOLS
29
Small size tool box Medium size tool box Large size tool box
15 20 25 Cy linder 30 40 50 Cylinder 75 80 100 Cy linder PUMP
Cylinder-Type Tools (SR-JOINT Tools)
COMBINATION (15A~100A) G2 LARGE SIZE TYPE COMBINATION (65A~100A)
Cylinder-Type Tool Components
TOOL BOX
Small size tool box Medium size tool box Large size tool box
15 20 25 Cylinder 32 40 50 Cylinder 65 80 100 Cylinder Pump
1 1 1 1 1 1 1 1 1 1 1 1 1
Cylinder Pump S/M/L Cylinder and JAW
SR Cutting Machine Checking Jig
A Type
B Type

28. DRP SR-JOINT
DRP AB-JOINT INSTALLATION GUIDE
30
1. SYSTEM DESCRIPTION
APPLICATION AREA
Cold & Hot Water Supply, Heating, Drainage, Cold & Hot Water
Pipe, Tap Water, Fire Sprinkler, Renovation & Remodelling
OPERATING TEMPERTURE 0℃ ~ 120℃
MATERIAL
Light gauge stainless steel pipes for general piping (KS D3595),
Stainless steel pipe (KS D3576)
FITTING
MATERIAL
STS304 (SCH/5,10,20,40),
STS 316L (SCH/5,10,20,40)
RUBBER RING EPDM( Ethylene Propylene Rubber) , KFM
METAL RING STS304, 316L
2. APPLICATION STANDARD
Light gauge stainless steel pipes for general piping (15A~100A)
Stainless steel pipe
Collective Standard Certification Hygiene & Safety Standard Certification
3. INSTALLATION GUIDE
A. General Instruction
1) Pipe and Fitting (DRP-SR)
① Cover the pipe with vinyl sheet to prevent dust and foreign substance from
piling on the surface of pipe or going into the pipe.
② Part that touches dissimilar metal (especially steel pipe, cast iron pipe and
other products made with iron) must be insulated.
③ All ends of the fitting should be covered with Protective Cap during storage to
prevent foreign substance from going into the pipe.
2) Pressing Tool
① Do not control the cylinder pump pressure (400kg/㎠) arbitrarily.
② Rust on the pressing jaw must be removed before use to prevent possible
corrosion and abnormal pressing. Pressing tool must be maintained properly.
③ Keep pressing tool clean after each use and spray anti-rust additive on the jaw
to prevent rust.
④ If pressing is not done in circular shape, stop pressing and contact our A/S
team to check the tool and replace it when necessary.
⑤ When using cylinder pump, check the oil gauge whether oil is enough and open
the air valve around halfway to flow in air before pressing.

29. DRP SR-JOINT
DRP AB-JOINT INSTALLATION GUIDE
31
B. Cutting Pipe
1) How to Use Stainless Steel Pipe Cutting Machine
① Only use a machine made exclusively for cutting stainless steel pipe. If a
wheel cutter is the only option, you must use cutting blade made exclusively
for cutting stainless material and then remove burr.
② You must mark the insertion depth before cutting the pipe.
③ Cut the pipe vertically.
2) Trimming & Removing Burr
① Trim inside and outside of the cut surface to make the surface smooth and
remove burr completely to prevent rubber ring damage and detachment
when inserting the pipe.
C. Pipe Installation
1) Cleaning Connecting Part (the part where pipe and joint overlap):
Remove oil, iron dust and other foreign substance from connecting part
2) Marking Insertion Depth and Insertion
① Mark insertion depth on the outside of the pipe according to the Insertion
Depth Chart (see below). Then insert.
[Insertion Depth Chart]
STANDARD SIZE 15A 20A 25A 30A 40A 50A 65A 80A 100A
INSERTION DEPTH
(MINIMUM)
22.8 25.1 25.1 35.0 36.0 44.0 73.0 78.0 79.0
② When inserting the pipe into the fitting, make sure the pipe is horizontally
align with the fitting in order to prevent rubber ring from detachment.
③ When insertion does not go smoothly, use drinking water or vegetable-based
detergent.
3) Tool
① Check to make sure that the pipe is inserted to the marked insertion depth.
② When using DRP tool, manufacturer of product and tool must be same.
③ Before pressing, make sure that dual rings of joint perfectly fit pressing jaw
and also check to ensure the pipe and pressing jaw are in 90 degree. After
checking, start pressing.

30. DRP SR-JOINT
DRP AB-JOINT INSTALLATION GUIDE
32
D. Checking after Pressing
1) Check with the naked eye to ensure the fitting has been pressed in circular shape
and double circular groove appears clearly.
2) When necessary, use a gauge or a vernier calipers to check the size (see Size Chart
After Pressing next page)
[SIZE CHART AFTER PREESSING]
STANDARD
SIZE
OUTSIDE
DIAMETER
BEFORE
PRESSING
AFTER
PRESSING
PERMISSIBLE
TOLERANCE
(mm)
15A 15.88 23.00 21.30 ±0.3
20A 22.22 30.50 28.50 ±0.3
25A 28.58 37.20 34.50 ±0.3
30A 34.00 45.00 41.90 ±0.3
40A 42.70 55.70 52.30 ±0.4
50A 48.60 62.20 58.20 ±0.4
65A 76.30 95.60 88.20 ±0.4
80A 89.10 111.00 103.50 ±0.5
100A 114.30 137.00 127.80 ±0.5
E. Hydraulic Test
1) Conduct test with pressure specified in drawings and specifications or with pressure
of 2.5MPa. If there is no specific regulation, test with pressure that is 2~3 times of
pressure normally used.
2) Use drinking water when you test. If drinking water is not available, use purified
water to prevent pipe corrosion.
3) After test, completely drain water to prevent corrosion due to foreign substance.

31. DRP SR-JOINT
DRP AB-JOINT INSTALLATION GUIDE
33
HOW TO USE DRP SR-JOINT TOOLS
Pipe Cutting
① When you cut the pipe, a proper cutter must be
used.
② Using a rotary cutter or an exclusive cutter is less
likely to form burr.
Rotary cutter
(15A~100A)
Exclusive cutter
(15A-100A)
③ The burr that may be formed either side of the
pipe should be removed. Internal foreign objects
should be removed as well.
Pipe Inserting
① Mark on the pipe so as to get enough depth
of insertion.
② Pipe must be inserted into Joint linearly.
③ If insertion doesn't go on smoothly, soap
bubbles may help.
※ When you insert the pipe, you must be careful
not to get damaged.
Marking the line Insert horizontal
Press by Gun
Contract JAW
and JOINT
Pressing the JOINT
① Check the sizes of proper JAW and JOINT
② Fit the groove of tool and mound of joint,
and press joint using exclusive tool.
③ Press the button (red point) and wait until
the pusher is automatically back
Verification
① Disassemble after compression.
jig pass (right) jig not pass (wrong)
② Confirm the joint by using a vernier caliper
or checking jig. If the jig is passed smoothly
or diameter measured by vernier caliper i
s same in manual, joint installation is compl
ete.

32. 34
DRP SR-JOINT
DRP AB-JOINT
IMPORTANT
NOTES
IMPORTANT NOTES
1. When Using a Pressing Tool
a. Ensure foreign substance, such as soil and sand, does not go into the operating part
of the tool.
b. Fit the jaw and cylinder correctly and insert all types of pin all the way.
c. Protect the tool from shock and do not attempt to disassemble the tool arbitrarily.
d. Power tools should get regular inspection every six months.
2. When Using a Pump
a. Screw off the oil cap about two rounds.
b. Replace hydraulic oil every three months. (Do not use nonstandard hydraulic oil)
c. Do not control pressure control valve arbitrarily. (Abnormal pressing can cause
leakage.)
d. After you press ON button, wait until you hear a clicking sound, which indicates that
pressing is complete. Do not press OFF button repeatedly while you wait for the
clicking sound. (It can cause malfunction).
3. When Using a Rechargeable Gun
a. Battery life can be shortened when the gun is used at a temperature below 0°C.
b. After pressing, charge the battery immediately when red LED lamp flickers
consistently.
c. If the red LED light flickers three times and warning alarm rings three times at the
same time, send the gun to a A/S centre immediately.
d. After about 50 times of pressing, stop using the gun and cool it down for 15 minutes.
e. Lubricate locking pin and roller regularly with a small amount of oil. (Example: WD-
50).
f. You can extend the battery life by charging the battery frequently, instead of doing
full charge or full discharge.
g. Do not disassemble the battery from the gun arbitrarily. It can cause the battery to
explode when the battery’s safety and protective device gets damaged.

33. 35
DRP SR-JOINT
DRP AB-JOINT
IMPORTANT
NOTES
IMPORTANT NOTES
4. When Conducting Hydraulic Test (Leakage Test)
a. Test must be done using drinking water.
b. After the test, completely remove the water from the pipe. If water
contaminated with foreign substance and dust caused during pipe
installation remains inside the pipe, it can result in pipe corrosion. If water
remains, it can also lead to freezing and bursting during winter time.
c. Make sure that lagging material does not get wet. When the hydraulic test is done on
the part where lagging material is used, corrosion can happen when lagging material is
wet.
d. Flush water out sufficiently after the pipe installation.
e. Flush contaminated water out sufficiently with drinking water and discharge water
completely.
MicrobiallyInduced Corrosion (MIC)
Quality of water is an important factor when it comes to pipe corrosion. Groundwater is a good
environment for microorganisms to grow and multiply. Use of groundwater for hydraulic test and
incomplete drainage after testing have frequently caused Microbial Induced Corrosion (MIC).
When groundwater is the only available option, make sure to avoid Microbial Induced Corrosion.
5. When Using Groundwater
a. Water treatment: Conduct water quality test in advance. When the test result shows
that the water quality does not meet the standard, perform proper chemical treatment.
Additional care is needed during the time of high temperature and humidity (from May
to August) due to increased possibility of MIC.
b. Draining and flushing: Water must be completely drained as soon as possible after
hydraulic test. It is also crucial to perform sufficient flushing using drinking water.

34. 36
DRP SR-JOINT
DRP AB-JOINT CLIENTS
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35. Australia HQ : 11 Lema CCT, Kuraby Queensland
Sales team: TEL/ 07)3423-1725
Global Manufacturing :
#490-15, Gwanjeong-ri, Jeonui-myeon, Sejong-si, Korea
TEL/ 044)414-9640~2 FAX/ 044)414-9643~4
Research&Development :
#3-3 Geungok-ri, Baegam-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea
TEL/ 031)322-1271~4 FAX/ 031)322-1276
www.drpjoint.com.au