We are one of the leading supplier of Corrugated Ducting for under-ground Cable Protection Management and Sewer Drainage known as HDPE Double Wall Corrugated (DWC) Pipes.

1. DOUBLE WALL CORRUGATED
HDPE PIPES for:
- cable ducts
- sewer application
- drainage
by
Jyoti Electricals
GF/10 Ruby Appartment,
Opp : Navjivan Bus Stop,
Ajwa Road, Vadodara.

2. Double Wall Corrugated Pipe
( DWC PIPE)
outside corrugated
inside smooth
3

3. PRODUCT Details
•
Name of Product: Double Walled Corrugated pipe from SIZE
50mm OD to 1200mm OD in discrete sizes.
•
Relevant specification:
•
For Cable Ducting :
• IS: 14930(part II): 2001,
• BSEN 50086-1 and 50086-2-4.
•
For Drainage:
•
•
•
BS EN 13476-1:2007, BS EN 13476-2:2007, BS EN 134763:2007
pr EN 13476-1, 2 and 3
Application:
•
Underground cable protection conduit and cable protection ducts for
Electrical and Communication installations
•
Sewage & Drainage

4. Comparison
DWP versus solid wall pipe
corrugated pipe
solid wall pipe
5

5. Comparison DWP versus solid wall pipe
Same stiffness
/smooth pipe
6
smooth pipe

6. Comparison DWP versus solid wall pipe
Same weight
7

7. Comparison
DWP versus spiral pipe
corrugated pipe
= much higher output
= continuous
production process
= lower weight
8
spiral pipe
= 6 meter bars only
= only from 400 mm
onwards

8. Comparison
DWP versus rigid pipe systems
corrugated pipe
9
GRP, concrete and clay pipes

9. COMPARISON CHART
Sr.
No.
Properties
Precast
concrete
Pipes
(RCC/Spun)
PVC
Pipes
6kg./cm
2
pressur
e
1.
Flexibility
The trenching
path is
seldom
straight, it is
required to
have lateral
curvatures
and ups &
downs, with
RCC pipes
this has to be
tackled with
acute corners
at joints.
Limited
flexibility
but the
pipes at
bends
become
s oval
and
creates
obstructi
on for
cables.
Plain
HDPE
pipes
6kg./cm2
pressure
Sait
Glazed
Stoneware
pipes
GI pipes
DWC Pipes
Limited
flexibility
but the
pipes at
bends
becomes
oval and
creates
obstruction
for cables.
For the
pipe to be
laid along
the trench
path, very
high
number of
joints and
fittings are
required to
create
bends.
No
flexibility
at all
With inherently built
moderate flexibility,
these pipes tackle the
trench path by aligning
with it with smooth
Curves (horizontal &
vertical). The
uniqueness of DWC
pipes is that even at
curves the internal
roundness is retained.
In case if plain plastic
pipes ovality is
observed at curvatures.

10. COMPARISON CHART
Sr.
No.
Properties
2.
Soil
settlements
3.
Co-efficient
of friction
PVC
Pipes
6kg./cm2
pressure
Plain
HDPE
pipes
6kg./cm2
pressure
Sait Glazed
Stoneware
pipes
GI pipes
DWC Pipes
Leads to
cracking of
pipes or
joints, in the
already laid
duct,
because the
pipe is
unable to
align to new
contours.
No
cracking
but same
problem
as
mentioned
in point
(1).
No
cracking
but same
problem as
mentioned
in point (1).
The pipe is
extremely
brittle and
fragile hence
soil
settlement
lead to
cracking of
joints as well
as pipe itself.
Creates
stresses
at joints
and in
the pipe
due to
rigidity.
As characterized
in point (1) soil
settlements do
not adversely
affect the already
laid duct
Very high.
May lead to
damage to
cable cover
of sub-ducts ,
at time of
insertion.
Low
Low
Very high
Very
high.
May
damage
cable
sheath
Low. Internal
surface of the
pipe being plain
,poses no
difficulty in cable
insertion.
Precast
concrete
Pipes
(RCC/Spun)

11. COMPARISON CHART
Sr.
No
.
Properties
Precast concrete
Pipes (RCC/Spun)
PVC
Pipes
6kg./cm
2
pressur
e
4.
5.
Number of
joints
Joining
Method
More number of
joints due to pipe
length equal to 3
mtr last concrete
pipes (RCC
/Supn).
Less
6kg./cm
Cement, sand has
to be available at
site & mixed.
Further, curling
time is required.
Creates,
permanent joint &
hence if
occasional
dismantling is
required, the joint
has to be break
opened.
Easy
2
pressur
e
Plain
HDPE
pipes
6kg./cm2
pressure
Sait
Glazed
Stoneware
pipes
GI pipes
DWC Pipes
Less
Plain
HDPE
pipes
6kg./cm2
pressure
Very high
number of
joints salt
glazed
stoneware
Pipes
Joints at
every bend
in the trench
path. GI
pipes
Less number of
joints, because
pipe is available
in 6 mtr. Is
available DWC
pipes.
Very
difficult
requires
welding
Threaded
joints
require
turning/
rotating of
fittings of
pipes.
Cement is
required.
Cumber
some
requiring
number of
tools. Hence
more
suitable for
above
ground
applications
Due to snap-ontype joints.
Inspite of being
HDPE, no
welding is
required. Fusion
welded joint also
can be used if a
joint with best
possible pulling
strength is
required

12. COMPARISON CHART
Sr.
No.
Propertie
s
Precast concrete
Pipes (RCC/Spun)
PVC
Pipes
6kg./c
m2
pressur
e
6.
Transport
Transport charges are
high due to loading
and un-loading
difficulties. Further, like
hood of breakage
exists in loading
operations. Material
handling equipment
like chain blokes and
tripod is required at
site.
Easy
7.
Labour at
site
An mentioned in point
(6)considerable labour
at the time of laying ,
lowering and jointing
operations.
Less
labour
require
d.
Sait
Glazed
Stoneware
pipes
GI
pipes
Easy
Transport
damages
are
extremely
high due
to fragility
of pipe
----
There is an absolute
ease in transporting,
loading, unloading
etc. to the extent
that the driver all by
himself can handle
his consignment
without any need for
collies.
Less but
specially
trained
labour
required
Considera
ble labour
required.
Careful
handling
required.
Skille
d
labou
r
requi
red.
Even a single
person can handle
these operations.
Plain
HDPE
pipes
6kg./cm2
pressure
DWC Pipes

13. COMPARISON CHART
PVC
Pipes
6kg./cm2
pressure
Plain HDPE
pipes
6kg./cm2
pressure
Sait Glazed
Stoneware
pipes
GI
pipes
As a
consequence of
point (4), (5) &
(6), the speed of
work is slow.
Fast
Not as fast
as PVC or
DWC.
As a
consequen
ce of point
(4), (5) (6)
& (7), the
speed of
work is
slow.
----
As a consequence
of point (4), (5) (6) &
(7), the speed of
work is fast.
Due to heavy
weight the cost
of the laid duct
works out to be
very high.
Low
Low
Cost of laid
duct works
out tobe
very high
High
Due to lightweight
the cost of the laid
duct works out to be
very high.
Sr.
No.
Propertie
s
Precast
concrete Pipes
(RCC/Spun)
8.
Speed of
work
9.
Laying
cost
DWC Pipes

14. COMPARISON CHART
Sr.
No.
Properties
Precast concrete
Pipes
(RCC/Spun)
PVC
Pipes
6kg./cm2
pressure
Plain
HDPE
pipes
6kg./cm
2
Sait
Glazed
Stoneware
pipes
GI
pipes
Chemical
properties
are better
than RCC
pipes.
Very
poor
DWC Pipes
pressur
e
10.
Chemical
and anti
corrosive
properties
and
biological
properties
Has limited
suitability in
acidic and
alkaline climates.
May support
biological growth.
Moderate
Good
High degree of
chemical interns &
high anti-corrosive
properties. Facilitates
use in aggressive
climates and soil
conditions, including
saline lands. Does not
support biological
growth.

15. COST COMPARISON BETWEEN SUPPLY AND LAYING OF
RCC/ GI AND DWC PIPE
Cost Comparison
Cost Comparison of Material and Laying of 100mm dia pipe of various material
Parameter
Cost of Pipe per meter
Cost of Trenching
RCC (NP_II)
GI Pipe (B Class)
DWC HDPE pipe
Comment
Cost per meter Comment
Cost per meter Comment
Cost per meter
This includes cost
of pipe+loading of
pipe+transportation
Same in all cases
Jointing of Pipe
Curing at Joints
TOTAL
This includes cost of
pipe+loading of
pipe+transportation
Same in all cases
This includes cost
of pipe+loading of
575.00 pipe+transportation
Same in all cases
150.00
5.00
Atleast 2 labor
required
3.00
Unloading one
truck having 2500
mtr pipe require
three labor @ Rs
100 per Labor
Laying involves 2
persons to lay 2
meter pipe
5.00
Laying involved
atleast two persons
for every 6 meters
3.00
One man required
to lay 6 meter pipe
3.00
Cement(1kg) and
Sand(4 kg) of ratio
of 1:4 required
along with mason
Coupler andSkilled
labor required with all
35.00 tool kit
Easy Snapfit
coupler provided
for every 6 meter
80.00 @ 30/- per coupler
5.00
Atleast 2 labor and
Cost of Unloading pipe at site
crane for safe
unloading without
damaging pipe
Local Cartaige and Laying
Cost
150
joint not available
immediately and
require curing
10.00 No Curing required
205.00
0.15
No curing required
661.00
Life of DWC HDPE PIPE IS 50 years
158.15
16

16. Comparison between DWC and Brick Laying
Cost Comparison
Cost Comparison of Material and Laying of cables under BRICK and Half split DWC PIPE
Size of brick
Size of equivalent pipe
Parameter
Cost of Pipe/ brick per meter
Cost of Trenching
Cost of Unloading pipe/ brick at site
Local Cartaige and Laying Cost
225*112*75 mm
77/63mm
(width is 225mm and length is 112mm)
(77mm is OD and 63mm is ID)
Brick protection (Class B)
Comment
Cost per meter
Comment
This includes cost of
bricks (9 nos. per
meter) + loading of
brick+transportation
Same in all cases
27.00
This includes cost of
pipe+loading of
pipe+transportation
Same in all cases
40.00
1.00
Only one labor required
0.10
Cost per meter
Laying involves 2
persons carry 9 bricks
TOTAL
4.00
32.00
Half split DWC pipe
Cost per meter
Laying involved one
persons for every 6
meters
3.00
43.10
Other advantages of half split DWC pipe over Brick Laying
1. Bricks are not of uniform quality, whereas half split DWC of uniform quality
2. Bricks give protection from above only whereas half split DWC gives protection from 3 sides
3. Whenever there is heavy rain, the bricks ususally are unable to stand water, whereas half split DWC pipe is able to stand
4. DWC is more reliable and has much longer life than bricks as made out of HDPE
5. The bricks usually breaks whenever there is heavy load whereas due to its structure half split DWC pipe is able to take this load
17

17. The DWC Application
Explanation of the problematic „cracks“
- Definition of „rigid pipe systems“
The pipe is stiffer than
the surrounded soil so
it has to take over all the
existing load ...
... until it breaks!
Load!
Crack!
18

18. The DWC Pipe application
Explanation of the problematic „cracks“
- Definition of „flexible pipe systems“
The pipe avoids the
load by deflection! The
surrounded soil takes
over all the load.
The stiffness of the soil is
about 10-200 higher than
the stiffness of the pipe.
The soil determinates the
stiffness of the whole system!
Flexibility!
Load!
19

19. DOUBLE WALL CORRUGATED
PLASTIC PIPES
for:
-Cable Ducts
20

20. Problems in Conventional Cable laying
21

21. Problems in Conventional Cable laying
22

22. The DWP in Cable Duct application
What does the end user expect of a good Cable Duct system?
- long durability
- weathering resistance
- resistance to abrasion
- effective working methods
- low installation costs
- Smooth insertion and protection of cables
- ...
 Cost Effective and safe
REPETATIVE DIGGING OF ROAD AND PATHS ARE AVOIDED
FOR FUTURE LAYING AND MAINTAINANCE OF CABLES BY
PROVIDING DWC PIPE
23

23. PROVISION FOR FUTURE CABLE LAYING
DWC pie laid in VIZAG
Manholes for Cable Jointing and Insertion
24

24. Layout Drawing of DWC PIPES to be laid for IRDP Projects for
future provision of cables
25

25. Application of DWC pipe in Cable Ducting
-For Cable Laying between Pole to Pole for Street Lighting
-PWD, Delhi
-MCD, Delhi
-NDMC, Delhi
-For Cable Laying in Bus Rapid Transit System (BRTS)
-Ahmadabad
-Delhi
-Indore
26

26. DWC pipe in Road Crossings
Ease of Laying pipe
27

27. Indian
Railways
Telecommunication
Companies
Electricity
Boards
PWD’s
End User
Development
Authorities
Municipal
Corporation
Airport
Authority
BRTS
PROJECT
S
City
Development
Industrial
Development

28. DOUBLE WALL CORRUGATED
HDPE PIPES for:
- Sewer application
- Drainage
29

29. The DWC HDPE in sewage application
What does the end user expect of a good sewage system?
- long durability
- weathering resistance
- resistance to chemical fluids
- resistance to abrasion
- universal application
- effective working methods
- low installation costs
- ...
 inexpensive and safe
30

30. The Existing Sewage System
Inspection of a pipe section of a “rigid” sewer system
31

31. Problems in existing sewage application
Abrasion
Obstacles in the drain off
32
Destruction
Cracks
Corrosion
Un-tight pipe connection

32. The DWP in sewage application
Explanation of the problematic „cracks“
- Definition of „rigid pipe systems“
The pipe is stiffer than
the surrounded soil so
it has to take over all the
existing load ...
... until it breaks!
Load!
Crack!
33

33. The DWP for sewage application
Example of a broken concrete sewer
34

34. The DWP in sewage application
Example of a broken concrete sewer
35

35. The DWP in sewage application
Explanation of the problematic „cracks“
- Definition of „flexible pipe systems“
The pipe avoids the
load by deflection! The
surrounded soil takes
over all the load.
The stiffness of the soil is
about 10-200 higher than
the stiffness of the pipe.
The soil determinates the
stiffness of the hole system!
Flexibility!
Load!
36

36. The DWP in sewage application
Conclusion:
Deformation
is
safety!
37

37. Installation
Destination trench ...
... for the next 50 to 100 years!
38

38. Standards for corrugated plastic pipes ...
...
...
... in sewage
application
CEN
EN 13476-3
 Plastic pipe systems for non-pressure
underground drainage and sewerage
39

39. EN 13476-3: 2007
General characteristics for pipes and fittings
Preferred colours
Black: best UV-protection (outside)
White: best for inspection (inside)
Orange-brown (terracotta): well-known from plain pipes (inside & outside)
40

40. EN 13476-3: 2007
Mechanical characteristics
Stiffness classes:
SN (2) – only for pipe sizes > DN 500
Only low level applications – not for corrugated pipes!
SN 4
Preferred stiffness class for drainage pipes
SN 8
Preferred stiffness class for sewer pipes
SN 16 – seldom used
For high loads and less installation depth
(difficult for PE-HD => stiffer materials: PP and PVC)
In Europe:
France ~ almost 100% SN 8;
Italy and Turkey ~ 80% SN 4 – 20% SN 8;
Scandinavia ~ 80-90% SN8 – others: SN4 and SN 16; ...

41. EN 13476-3: 2007
Mechanical characteristics
Standard:
ISO 9969 – determination of pipe stiffness
“constant speed”
- 23° C, 2h conditioning time
- at least 24h after production
- 2 parallel plates
- defined testing speed (depends on size)
- until 3,0% deflection of inner diameter
 measured force => Ring Stiffness S
Formula:
S = (0,0186 + 0,025
y
D
0,03
42
0,1935
)
F
Lxy
[kN/m²]

42. EN 13476-3: 2007
Mechanical characteristics
Standard:
EN 1446 – determination of ring flexibility
“constant speed”
- 23° C, 2h conditioning time
- at least 24h after production
- 2 parallel plates
- defined testing speed (depends on
size)
Same as ISO 9969, except:
- until 30% deflection of outer diameter
1.) Conform with (during the test):
- no decrease of force
- no cracking
2.) Conform with (after the test):
43
- no wall delamination or other types of rupture
- no permanent buckling in the structure of the pipe

43. EN 13476-3: 2007
Mechanical characteristics
Typical example:
EN 1446
1.) Visual inspection
Test passed
44
Test failed

44. EN 13476-3: 2007
Mechanical characteristics
Standard:
EN 744 – determination of impact behaviour
- 0° C, 2h conditioning time
- at least 24h after production
- drop height: (1600) 2000 mm
- defined striker
- defined weight (depends on pipe size)
0,5 kg – 3,2 kg
Requirement: TIR not more then 10%
(True Impact Rate)
45

45. EN 13476-3: 2007
Physical characteristics
for corrugated pipes only relevant:
Oven test: ISO 12091: 1995
- 23°C, 2h conditioning time
- 300 mm long, cut longitudinally into
two equal-sized sections
- PE/PP: 110°C
 No delaminations, cracks or bubbles
46

46. The DWP in sewage application
Abrasion on different sewage pipe systems
Abrasion[mm]
4,5
4,0
Asbestos
cement
3,5
3,0
Clay
2,5
2,0
1,5
Test machine
Concrete
1,0
PVC
0,5
20 000
40 000
60 000
Stress cycles endured [-]
Abrasion of different materials
(„Darmstädter Methode“)
47
PP
PE-HD

47. Summary of corrugated double wall pipes
Requirements on a good sewage pipe system:
- long durability
- low specific weight
- weathering resistance
- high flexibility and elasticity
- resistance to chemical fluids
- high impact strength
- resistance to abrasion
- high abrasion resistance
- universal application
- less connecting parts
- effective working methods
- no defects caused by rodents (animals)
- low installation costs
- high resistance to UV radiation
- ...
- most efficient hydraulic properties
 inexpensive and safe
- very high resistance to chemical fluids
 The corrugated PE or PP pipe gives you the most
suitable system!
48