HDPE Corrugated
PIPES & FITTINGS
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introduction
“NIC HDPE” factory was established in 2002 in response to the ever increasing
demand in Kuwait and neighboring countries for sewerage and rain water
pipes. This factory is considered one of the largest in the Middle East, with an
annual production capacity reaching 9,000 metric tones of HDPE corrugated
pipes and fittings. HDPE pipes with profiled corrugation ranges from 300 to
4000 mm. (5000 MT/Yr), and HDPE pipes with circular corrugation ranges from
100 to 500mm (4000 MT/Yr).
“NIC HDPE” corrugated pipes are produced as per various international
standards. Special pipes are also produced meeting special requirements
of clients.
NIC HDPE corrugated pipes
with spiral corrugation 300 to 4000mm
Production of NIC HDPE NIC HDPE corrugated pipes
corrugated pipes with integrated socket with circular corrugation 100 to 500mm
1
“NIC HDPE” Corrugated pipes
Used Standards and recommendations
Pipe: DIN 16961, EN 13476
Or on request meeting
ASTM F 894, NBR 7373, JS K 6780
Statical calculations: ISO 9969, ATV A 127
Hydraulic calculations: ATV A 110
Laying of pipes EN 1610, ASTM D 2321,
ASTM D 2774, ASTM F 1668
Welding / Electro fusion of pipes: DVS 2207, ASTM D 2657,
ASTM F 1055
Flexible rubber joints for pipes ASTM D 3212, EN 13476
Testing of installation ASTM 1417
Internal standard: KWS
Pipes with profiled corrugation
Di = 300mm to 4000mm, Standard L = 6m
Pipes with circular corrugation
Di = 100mm to 500mm, Standard L = 6m
“NIC HDPE” corrugated pipes are produced with standard length of 6 meters.
However, special lengths can be provided on request. For HDPE pipes with
profiled corrugation, short pipes with double socket or double spigot can also
be produced. Double socket coupling, with stop and without stop (slip on), are
available to connect corrugated pipes.
2
NIC HDPE Corrugated pipes (Circular corrugation)
Stiffness as per ISO 9969
Nominal Dia. Outside Dia. Type SN 2 Type SN 4 Type SN 8 Type SN 16
DN mm mm SR=2kN SR=4kN SR=8kN SR=16kN
100 116 ** ** DWCC 100 **
150 174 ** ** DWCC 150 **
200 232 ** ** DWCC 200 **
250 290 ** ** DWCC 250 **
300 348 ** ** DWCC 300 **
350 406 ** ** DWCC 350 **
400 463 ** ** DWCC 400 **
500 580 ** ** DWCC 500 **
** stands for special profile shapes on request
NIC HDPE Corrugated pipes (Spiral corrugation)
Stiffness as per ISO 9969
Nominal Dia. Outside Dia. Type SN 2 Type SN 4 Type SN 8 Type SN 16
DN mm mm SR=2kN SR=4kN SR=8kN SR=16kN
300 356 PR 21-0.4 PR 21-0.4 PR 21-0.4 PR 34-0.99
400 482 PR 21-0.4 PR 21-0.4 PR 34-0.99 PR 42-1.9
500 598 PR 21-0.4 PR 34-0.99 PR 42-1.9 PR 54-4.5
600 702 PR 34-0.99 PR 34-1.2 PR 42-2.6 PR 54-4.7
700 826 PR 34-0.99 PR 42-1.9 PR 54-4.5 PR 54-8.0
800 930 PR 42-1.9 PR 54-4.5 PR 54-5.5 PR 54-11.39
900 1038 PR 42-2.28 PR 54-4.5 PR 65-7.22 PR 54-16.3
1000 1140 PR 42-2.6 PR 65-6.46 PR 65-11.28 **
1200 1342 PR 54-4.5 PR 65-8.25 PR 65-18.4 **
1400 1564 PR 54-7.0 PR 75-14.61 OP 65-29.16 **
1600 1772 PR 54-11.36 PR 75-20.38 OP 65-43.95 **
1800 1980 PR 54-16.3 PR 75-29.65 OP 65-62.74 **
2000 2270 PR 54-24.25 OP 75-42.77 OP 65-83.77 **
2500 2800 OP 75-40.4 OP 75-80.2 OP 75-168.1 **
2200 to 4000 ** ** ** ** **
** stands for special profile shapes on request
Outside diameter of sizes 300 to 900 are for Type SN8 and above size 900 are Type SN4
3
Jointing Techniques
“NIC HDPE” corrugated pipes having spiral corrugation
can be supplied with four type of joints.
Pipes with rubber seal joint are most easy to install.
Rubber Seal Joint
Pipes with Electro-fusion joint are recommended because
whole pipe becomes homogeneous after welding.
Electro-fusion Joint
Extrusion welding are carried out as additional measure
with electro-fusion joint while using ppipes under vacuum.
Extrusion Welding Joint
Flange joints are resourceful when we wish to connect
HDPE pipes with shut off valves or butter fly valves.
Flange Joint
“NIC HDPE” corrugated pipes with circular corrugation
have integral built-in bell for pipe sizes 200mm & above.
For pipe size 100 to 150mm, a special coupler is fixed on
one end of pipe. Pipes are supplied with factory installed
rubber gasket at spigot end.
Installation of pipes is facilitated just by applying lubricant
of gasket and then pushing spigot into bell end or cooupler.
Due to push fit jointing technique, these pipes have faster
installation and low labor costs.
Rubber Seal Joint for circular corrugated pipes
4
Fittings for “NIC HDPE” Corrugated pipes
1. Branches:
Branches can be manufactured and delivered in every type and form. The
angle can be adapted individually from 30º to 90º as well as the ends and
the respective segment lengths. Branches can be all socket or socket -
spigot as per customers requirement.
2. Bends:
Bends can be manufactured and segmented in different angles (150, 300,
450, 600, 750, 900) and the related radius of the bend to pipe diameter can
be selected independently. Bends can be all socket or socket - spigot as per
customers requirement.
3. Reductions:
Reduction can be made both centric and eccentric so that the reduction
will always meet the requirements. Reductions can be all socket or socket -
spigot as per customers requirement.
4. Couplers & Repair Couplers:
Couplers with stop at center & couplers without stop (for repair work) are
available for all pipe sizes 100mm to 2,000mm.
5. Puddle Flanges:
In order to lead “NIC HDPE” corrugated pipes through wall, e.g. in sewage
plants or concrete shafts of manholes, we recommend our puddle flanges
which can be mounted in concrete. The tightness is secured by a ring made
of EPDM. Special projections on outer surface can be provided if more
tightness is required.
6. Septic Tanks
HDPE septic tanks are a key part of household and commercial septic
systems. Naturally occurring bacteria completely treats the septic waste
in environmentally responsible way. HDPE septic tanks are long life, light
weight and are easy to install on sites with difficult access.
Please contact us for detailed information on NIC HDPE Manholes.
5
Fittings for NIC HDPE Corrugated Pipes
Branches
Branches can be manufactured and delivered in every type and form. The angle
can be adapted individually from 30º to 90º as well as the ends and the respective
segment lengths.
Branches dimensions
Di1 [mm] Ls [mm] Di2 [mm] Lt [mm] L1 [mm] L2 [mm]
100 80 100 500 430 180
150 90 100/150 500 440 200
200 130 100/150/200 550 450 240
250 150 100/150/200/250 580 460 300
300 170 100/150/200/250/300 670 470 320
350 190 100/150/200/250/300/350 850 550 400
400 220 100/150/200/250/300/350/400 1000 650 500
500 250 100/150/200/250/300/350/400/500 1200 760 590
All Lengths Ls, Lt, L1 & L2 are for guidance. Actual length of fittings may be +/- 10%
6
Branches connecting Plain pipes.
Branches can be manufactured and delivered in every type and form. The angle
can be adapted individually from 30º to 90º as well as the ends and the respective
segment lengths.
Branches connecting plain wall dimensions
Di1 [mm] Ls [mm] Di2 [mm] Lt [mm] L1 [mm] L2 [mm]
100 80 100 500 430 180
150 90 100/150 500 440 200
200 130 100/150/200 550 450 240
250 150 100/150/200/250 580 460 300
300 170 100/150/200/250/300 670 470 320
350 190 100/150/200/250/300/350 850 550 400
400 220 100/150/200/250/300/350/400 1000 650 500
500 250 100/150/200/250/300/350/400/500 1200 760 590
All Lengths Ls, Lt, L1 & L2 are for guidance. Actual length of fittings may be +/- 10%
7
Bends
Bends can be manufactured and segmented in different angles and the related
radius of the bend to pipe diameter can be selected independently.
Bend dimensions
Angle 15º 30º 45º 60º 75º 90º
No of Segments 2 2 3 3 4 4
Di [mm] Ls [mm] L [mm] L [mm] L [mm] L [mm] L [mm] L [mm]
100 80 160 130 230 320 430 580
150 90 210 130 230 320 430 580
200 130 260 150 240 350 460 610
250 150 310 160 260 370 500 640
300 170 360 170 270 390 530 690
350 190 430 190 310 450 610 800
400 220 480 220 370 520 700 910
500 250 610 270 450 650 880 1140
All Lengths Ls & L are for guidance. Actual length of fittings may be +/- 10%
8
Reductions
Reduction can be mane both centric and eccentric so that the reduction will always
meet the requirements.
Reduction dimensions
Di1 [mm] Ls [mm] Di2 [mm] Ls [mm] Lt [mm]
150 90 100 80 640
200 130 100 80 870
200 130 150 90 740
250 150 150 90 970
250 150 200 130 840
300 170 200 130 1070
300 170 250 150 940
350 190 250 150 1170
350 190 300 170 1040
400 220 300 170 1270
400 220 350 190 1140
500 250 350 190 1610
500 250 400 220 1470
All Lengths Ls & Lt are for guidance. Actual length of fittings may be +/- 10%
9
NIC HDPE Corrugated Pipes for Storm Water, NIC HDPE Corrugated Pipes for Sanitary / Sewerage water,
connecting to Concrete Manholes at project in Kuwait connecting to HDPE Manholes, project in Oman
NIC HDPE Corrugated Pipes with flanged connection NIC HDPE Corrugated Pipes
for sea water intake project in UAE for sea water intake project in UAE
Bend for NIC HDPE Corrugated Pipe, NIC HDPE Corrugated Pipes for Storm Water
with socket and spigot, for project in Iraq with electro-fusion connection at project in Kuwait
Special Tank made from NIC HDPE Corrugated Pipes NIC HDPE Corrugated Pipe used as
for water treatment sewerage water bio treament plant for project in Oman
10
Quality
“NIC HDPE” corrugated pipes are made from HDPE material which have
service life of more than 100 years.
Before production control
The raw material HDPE is purchased from reputed supplier. This raw material
is tested (Biyearly) for various requirements listed by local governmental
bodies by third party testing facilities like KISR and Kuwait University. Every
test is documented, analyzed and filed with local governmental bodies.
Testing of MeltFlow Rate
During production control
During the production the individual working steps are continuously supervised
and documented. Moreover the most important dimensions are measured and
if necessary, corrected. These measured dimensions are randomly verified by
third party approved by local governmental bodies.
Dimension check by QC Department
After production control
After the production, the final product is tested and compared to the all
requirements of the customer.
In order to guarantee that the static theoretic values are conforming to the
reality, pipes are tested with the help of ring stiffness according to DIN 16961
or ISO 9969.
Pipe joint is also tested to ensure tightness of joint.
Pipe samples are also sent to third party like Kuwait University for quality test (Bi
yearly). Every test is documented, analyzed and filed with local governmental
bodies.
Ring stiffness testing as per ISO 9969
Quality certificates and external quality control
In general the whole production is constantly supervised by our QC department
and by a third party inspection, like Kuwait University. All quality procedures and
management confirms to requirement of ISO 9001 : 2008.
11
Handling, Storage and Installation
of “NIC HDPE” Corrugated Pipes.
A. Storage at site
Storage at site
For safety and Pipes and fittings should be transported and stored in their packaging. The
protective packaging on socket and spigot should be kept intact until material is required
for use. All pipe stacks should be made on firm, flat ground to support the weight of the
pipes and lifting equipment. Pipes or fittings must not rest on the socket. Pipes should be
stacked with the sockets at alternate ends. the stacking height for pipes should be limited
to 4 units, not more than 3 meters, and adequately wedged to prevent movement. Pipes
must be stored from timber to timber. Pipes and fittings should be stored away from heat
sources. Avoid contamination from medias such as diesel oil. When pipes are exposed
to sunlight for prolonged time, pipes should be covered. Protect all materials from theft,
vandalism, accidental damage or contamination.
B. Trenching
Trenching at Oman Trenching at Kuwait
References for trenching practice are in AASHTO Section 30 and ASTM D2321. Both
of these specifications provide guidelines for trench widths applicable to a variety of
installation conditions. Trench widths may be varied based on the competency of the in-
situ soil, backfill materials, compaction levels and loads.
12
C. Foundation
Bedding of Trench
A stable foundation must be provided to ensure proper line and grade is maintained.
Unsuitable foundations must be stabilized at the engineer›s direction. Unsuitable or
unstable foundations may be undercut and replaced with a suitable bedding material,
placed in 6” lifts. Other methods of stabilization, such as geo fabrics may be appropriate
based on the engineer’s judgment.
D. Bedding
Trench Foundation Bedding at Oman
A stable and uniform bedding shall be provided for the pipe and any protruding features
of its joints and/or fittings. The middle of the bedding, equal to 1/3rd of the pipe OD, may
be loosely placed, with the remainder compacted to a minimum of 90 percent standard
proctor density. Class I, II and III materials are suitable for use as bedding.
13
E. Loading
Loading at project in Kuwait
Never drop the pipes. Lifting points should always be well spread and evenly spaced.
Care must be taken to prevent slippage or excessive bowing of the pipes. Tie the load
well to prevent rubbing. Use nylon straps, not chains or ropes.
F. Cleaning & Rubber Lubrication
Applying Lubrication to socket and spigot,
after cleaning, at Kuwait
Make sure that spigot end, socket and sealing ring are clean from sand, moisture, dust
etc. Install the rubber sealing into the groove. Apply lubricant evenly onto the spigot end
and the rubber sealing.
14
G. Assembly
Assembly of pipes at project in Kuwait
Align the pipes vertically and horizontally. Larger dimensions can be installed by using an
excavator. Protect the socket opening with a sheet or plank. Observe that the sealing ring
stays in position.
H. Haunching
Haunching
Proper haunching provides a major portion of the pipe›s strength and stability. Care
must be exercised to ensure placement and compaction of the embedment material
in the haunches. For larger diameter pipes (>700mm), embedment materials should
be worked under the haunches by hand. Haunching materials may be Class I, II or III
and must be placed and compacted in 8 inch maximum lifts, compacted to 90 percent
standard proctor density.
15
I. Initial Backfill
Initial backfill Initial backfill at project in Oman
Initial backfill materials are required to 3/4 of the pipe diameter for proper structural performance of the pipe. The AASHTO
and ASTM specifications extend the initial backfill from the springline 6 to 12 inches above the pipe to provide protection
for the pipe from construction operations during placement of the final backfill and protect the pipe from stones or cobbles
in the final backfill. For proper structural performance of the pipe, the initial backfill need only extend to 3/4 of the pipe
diameter. Class I, II, III or low plasticity Class IV materials may be used for initial backfill.
J. Final Backfill
Final Backfill Final Backfill at project in Oman
The final backfill should be the same material as the proposed embankment. Generally, the excavated material may be used as
final backfill. Placement should be as specified for the embankment. In lieu of a specification, the final backfill should be placed
in 12 inch maximum lifts and compacted to a minimum 85 percent standard proctor density. Compaction should be
performed at optimum moisture content.
3020919
16
Sales Outlet
Main Administration
Shuwaikh
Tel: 24642100
Kuwait Hotline: 1844555
Ceramics Sales: 24836564
Working Hours*:
Morning Hours (Sunday - Thursday)
7:30am - 3:00pm
Evening Hours (Sunday - Wednesday)
5:00pm - 8:00pm
Saturday
7:30am - 2:00pm
Western
Industrial
Sulaibiya Shuaiba
Tel: 24642200 Tel: 24642300
Working Hours*: Ceramics Factory:
23262714/10
Saturday
7:30am - 2:00pm Working Hours*:
Sunday - Thursday Sunday - Thursday
7:30am - 3:00pm 7:30am - 3:00pm
Saturday
7:30am - 2:00pm
Ceramics Industrial Shuwaikh
Showroom Showroom
Industrial Shuwaikh Industrial Shuwaikh2 - Block1
Humaidhi Complex Area 92 - Al-Zaben Complex
Opposite to Bin Nisf Co. Shops : 12,13,14
Tel: 24950871/2 Tel. : 24642101/2/3/4/9
Factory: 23262714/10 Fax : 24642110
Working Hours*: Working Hours*:
Sunday - Thursday: Saturday - Thursday
9:00am - 9:00pm 7:00am-9:00pm
For any sales inquiry: Fax: +965 24642063 - Email: sales@nicbm.com
* Working hours are subject to change according to holidays and occasions
National_Industries Suggestions: +965 99001150 National Industries NICKuwait1 Direct Sales: +965 99001146
