Waterprooﬁng test

Water stop ﬂexible joint for ﬁtting pipe junction of sewer pipe

SANTAC BRANCH
External water pressure

Internal water pressure

Compression indentation test

Outline of external water pressure test

Water pressure gauge

Bending Angle 20°

End cap

Testing method

Displacement
jackSANTACBRANCH

Mounting tube
(Hard PVC pipe
φ150)

Flexureholding jig

Main pipe(Rigid PVC pipe
φ200)
Water tank
Water

This paper holds the main pipe and the attaching pipe by
the SANTAC BRANCH pipe, and holds it for 3 minutes byadding the external water pressure of 0. 1MPa from theoutside surface of the pipe and the branch in the state inwhich the main pipe is ﬁxed, and conﬁrms the existenceof the leak of the SANTAC BRANCH by visually.
In addition, with the attaching pipe tilted by 20 degrees,
0. 1MPa of external water pressure was added and kept
for 3 minutes, and the existence of water leak in theSANTAC BRANCH was conﬁrmed visually.
Next, a 5% slippage variant was given to this pipe under
the condition of 0 degrees or 20 degrees of inﬂection
angle of the ﬁtting pipe, and 0. 1MPa of external waterpressure was added to hold for 3 minutes, and thepresence of leaks in the SANTAC BRANCH pipe wasconﬁrmed visually.
Test Results

Test Results
Types used

Main pipe deﬂection
ratio(%)

External waterpressure(MPa)00.1

SANTAC BRANCH
numberMH-SJ200/150

50.1

Bending angle ofthe mounting tube

External waterpressure resultResults

0°

3 minutes

No abnormal

20°

3 minutes

No abnormal

0°

3 minutes

No abnormal

20°

3 minutes

No abnormal

The speciﬁcations and appearance are subject to change without notice for product improvement.

HAYAKAWA RUBBER CO. ,LTD
https://www.hrc.co.jp/

HAYAKAWA RUBBER CO. ,LTD

Head Oﬃce5351 Minamioka, Minoshima-cho, Fukuyama City, Hiroshima Prefecture

Overseas Dept.
1-16-10, Saga, Koto-ku, Tokyo
2020.12.04.SKD

Innovations Leading the 21st Century-Sealing and Joints

This product was certiﬁed and certiﬁed by the Sewerage New Technology Promo-

Water stop ﬂexible joint for ﬁtting pipe junction of sewer pipeby the Construction Technology Certiﬁcation Council based on the Principal Terms

SANTAC BRANCH

for Implementation of Construction Technology Certiﬁcation Project (Sewerage

Speciﬁcations and composition

tion Organization in the Construction Technology Certiﬁcation Project establishedTechnology) with the aim of contributing to the promotion of the utilization of new
construction technology developed voluntarily by the private sector.
Certiﬁcation No. 1643

Tectonic proﬁleComparison of Features and Conventional Method

Dimensionsa(Inner diameter)

Presser foot cover(SUS304)● This pipe and the Suntac branch pipe
are blocked by butylrubber adhesive(SPAN SEAL).
● Mounting pipes are crimped andfastened with fastening bands toensure complete water tightness.

Conventional method● In some cases, water may leak from thesurface over time.
● The pipe may be damaged or deformed
due to uneven settlement of backﬁllingsoil or uneven load caused by pulling outof the sheet pile.

Fastening band
(SUS304)e

Fastening band
(SUS304)

Watertightness

Mounting tube

Mounting tubeb

SANTAC BRANCH

Butyl rubber adhesive(SPAN SEAL)

Main rubber(Specialty synthetic rubber)

Butyl rubber adhesive(SPAN SEAL)

Rdcf

Butyl rubber adhesive(SPAN SEAL)

Flexibility

Pipe size
Application Main pipe × mounting tube Product Number● Special synthetic rubber and its shape ● It has little ﬂexibility and may receive
displacement due to unequal settlement,
can follow displacements such as unequaletc., and intruding water may enter fromsettlement.
the connection part.
● Line tightening.
● Adhesives for PVC tubes, 2-partadhesives and kneading adhesives areused.
Bending angle
Adhesive

Main pipe

U band(SUS304)

Presser foot cover(SUS304)

Reinforcing ring(Hard PVC)

PVC pipe

CAUTION
Shape of the tip of the mounting tube to be inserted● The bending angle to the mounting
tube should be within 15°.

Butyl rubber adhesive(SPAN SEAL)

Durability

Main rubber(Specialty synthetic rubber)● Specialty synthetic rubber, butylrubber
adhesive, fastening bands, andforeclosure covers are excellent indurability.
● It can be used under any conditions
because it uses special synthetic
rubber with ozone resistance, weatherresistance, and chemical resistance.

● Durability is not recognized.
It is rounded.

Workability

Main pipe

U band(SUS304)● Chamfering of the end of the mounting
tube is not required.
● Can be installed in about 10 minutes
without skill.
● A fumed method that requires nothing,such as adhesives.
● It does not require curing and can beﬁlled back soon after installation.

10 minutes
No adhesive

Receiving
part

φ100

φ125

φ150

Boring diameter

120㎜

150㎜

170㎜

Economic Eﬃciency

Mounting tube

● It is possible to shorten theconstruction period because it can beﬁlled immediately after installation.
● Due to the watertightness andavailability of water, long-term
maintenance and management costs
can be reduced.

Correct tip
processing
Horizontally andvertically● Concrete, adhesives, and joints taketime and cannot be ﬁlled back.
● It is diﬃcult to adjust the slope, and itis necessary to devise and use songs
and ﬂexible joints.
● Form assembly, concrete placement
and its curing are required.

Please conduct correct advanced processing.
I would like to observe it because its support is becoming worse.

Hume pipe

Ceramics pipe

High ceramic pipe

abce

f

150×100

MH-SJ150/100

82.5

118

98.4

233

200

175

150×125

MH-SJ150/125

82.5

144

103.5

259

236

175

200×100

MH-SJ200/100 108.0

118

98.4

233

203

221

200×125

MH-SJ200/125 108.014498.4259

218

225

200×150

MH-SJ200/150 108.0

169

98.4

284

218

225

250×100

MH-SJ250/100 108.0

118

98.4

233

203

221

250×150

MH-SJ250/150 133.5

169

98.4

284

237

274

300×100

MH-SJ300/100 159.0

118

98.4

253

230

314

300×150

MH-SJ300/150 159.0

169

103.4304

265

325

350×100

MH-SJ350/100 159.0

169

98.4

253

230

314

350×150

MH-SJ350/150 159.0

169

103.4

304

265

325

400×150

MH-SJ400/150 159.0

169

103.4304

265

325

200×150

MH-SJH200/150 133.5

169

98.4

284

237

274

250×150

MH-SJH250/150 159.0

169

103.4304

265

325

300×150

MH-SJH300/150 159.0

169

103.4

304

265

325

350×150

MH-SJH350/150 159.0

169

103.4

304

265

325

200×100

MH-SJT200/100 108.0

118

98.4

233

203

221

200×150

MH-SJT200/150 108.0

169

97.9

284

218

225

150×100

MH-SJS150/100

82.5

118

97.5

233

200

175

200×100

MH-SJS200/100 108.0

118

98.4

233

203

221

200×150

MH-SJS200/150 108.0

169

97.9

284

218

225

250×100

MH-SJS250/100 108.0

118

98.4

284

233

221

250×150

MH-SJS250/150 133.5

169

98.4

284237274※ Please request that you have a detailed diagram for each part number.
※ Please inquire separately except for the above sizes.

ProcedureLong time

Note
Use a hole saw with thespeciﬁed dimensions because
drilling will interfere withwatertightness and bearing
capacity if the diameters are
not as shown below.

The surrounding area
is decovocal.

Make sure that the cutting edge of the ﬁtting pipe is in the right shapeso that it properly ﬁts the receiving part of the SANTAC BRANCH.

Powerful
Bolt/Washer/Nut(SUS304)
Anti-incineration treatment

It is chamfered.

Dimensions(㎜)Rd● It does not require special products
and the cost of installation isinexpensive. However, because it is
low in watertightness and isunavailable, it incurs repair costs andincreases long-term maintenance andmanagement costs.In addition, skilledconstruction is required forconstruction, and personnel
procurement and personnel costs are aproblem.

① Cleaning of the pipeboring portion.

② Set of main rubber.

③ Protective ﬁlms arestripped and squeezed.

④ Place the presser footcover.

⑤ Stop the U-band.

⑥ Bolt tightening.
Tighten up to approx. 20mm.

⑦ Insert the mounting
tube.
（Installation angle iswithin 15°）

⑧ Peel protective ﬁlm.

⑨ Tightening band
(Torque Tighten with
4.9N･m or more.)⑩ Filling back.

※ Precautions / Use protective equipment (gloves, etc.) to ensure safety.