Concrete Pipes

CPM offer an extensive range of precast concrete flexible jointed pipes from 225mm to 1800mm to BS EN 1916:2002 Class 120, ovoid pipes and perforated pipes for use in both foul and surface water applications. Concrete pipes dating back to Roman times have been discovered in the United Kingdom and users of CPM precast concrete pipes have the security of a design life of 120 years that ensures lifetime costs are kept to a minimum.

All precast concrete pipes manufactured to class 4 (DC4) sulphate resistance in accordance with the recommendations of BRE Special Digest

With an inherent strength and durability, concrete is an environmentally friendly and cost effective material that provides the following benefits

Increased cost savings Quicker installation Lower environmental impact

Nominal sizeDN

Amm

(length)

Bmm

Cmm

Angular deflection(Degrees

)

Pipe Joint Type

'G' ring Integral Lamell

Approx. weight of

pipe

kg

Rocker Pipe

Length

Butt Pipe

Length

225 1.25 380 295 2.90 X     122 0.6 0.6300 1.25 480 410 2.40   X   217 0.6 0.6*300 2.50 497 410 2.40   X   334 0.6 0.6*375 2.50* 575 490 1.90   X   510 0.6 0.6450 2.50* 675 575 1.60   X   705 0.6 0.6525 2.50* 760 670 1.40   X   915 0.6 0.6600 2.50* 850 770 1.20   X   1210 0.6 0.6675 2.50* 980 820 1.05  X   1235 1.0 1.0750 2.50* 1060 980 0.95   X   1924 1.0 1.0825 2.50* 1143 985 0.90 X     1820 1.25 1.0900 2.50* 1235 1080 0.80   X   1920 1.25 1.251050 2.50* 1420 1260 0.70 X   2590 1.25 1.251200 2.50* 1590 1440 0.60 X   3550 1.25 1.251350 2.50* 1840 1620 0.53 X     4600 1.25 1.25

1500 2.50* 1810 1810 0.48     X 5230 1.25 1.251600 2.50* 1920 1920 0.44     X 5702 1.25 1.25

1800 2.50* 2160 2160 0.40     X 7150 1.25 1.25

Tabled dimensions are for guidance only. For accurate dimensions and weights, contact the Technical Department, as these may vary. * indicates effective length of uni-junctions, which are suitable to connect to 150mm Supersleve pipe

(In-wall Joint)    

Butt Pipes/Rocker Pipes

Sewers for Adoption (7th Edition) states you should allow for any differential settlement between the manhole and pipeline, with short lengths of either spigot/socket butt pipes being built into the manhole wall. A rocker pipe should then be laid connecting the short spigot/socket butt concrete pipe to the incoming/outgoing pipe run, thereby incorporating a flexible joint close to the manhole

              

Junctions/Uni junctions/Tumbling Bays

Junctions 100mm and upwards can be fitted to all pipe sizes. Branches can be made from drainage materials other than concrete and are normally fitted to both full length and short length pipes to suit customer requirements.

Uni junctions are supplied fitted to pipes from 300mm up to 1800mm diameter to suit 150mm connections. The junction is produced by inserting a rubber gasket to BS EN 681-1:1996 into the main pipe at the factory, providing a watertight seal for the branch connection.

The uni junction is:

less susceptible to site and transport damage and therefore easier to transport, handle and install

able to accommodate a range of pipes material using adaptors angular connections can be made by using bends faster installation

NEED UNI JUNCTION PHOTOS

The uni junction is designed to suit 150mm supersleve clay pipes. To connect to plastic pipes, an adaptor coupling from the clay to the plastic pipe will be required. Alternatively for certain plastic pipes an adaptor bush is available.

Fabekun Junctions

For connections to existing pipelines CPM can supply 'FABEKUN' junctions, the 'FABEKUN' junction offers specifiers and installers a wide range of benefits due to its quick and simple installation providing a permanent sealed connection. It can also be offered pre-installed by CPM, ideal for multiple connections. The 'FABEKUN' junction is available to suit DN160 and DN200 connections and is approved in the UK by WRc.

Tumbling Bay Junctions

A square or oblique tumbling bay junction are available, for more information please contact our Sales team on 01179 812791 or email sales@cpm-group.com

Polygonal Bends

Bends are manufactured by cutting pipes into two or three segments and joining them together at the required angle using an epoxy resin.

Standard bends are generally supplied in accordance with the tables below.

  11.25o 22.5o 45o

Nominal Size

Leg Total effective length

Leg Total effective length

Leg Total effective length

DN mm mm mm mm mm mm

225 - 600675 - 750

825 - 12001350 - 1800

300500625625

600100012501250

300500625625

600100012501250

300500625

1250

600100012502500

 

 

Nominal Size

90o

Leg Total effectivelength

DN mm mm

225 - 300 415 1250

375 - 600 415 1250

675 - 900 585 1750

1000 - 1200 835 2500

1350 and above Please contact the technical department on 01902 356220 or email technical@cpm-group.com

Please note: Where specific angles, centre line lengths or radii are required, these must be specified at the time of order (specials made to order). Bends may not necessarily have the same load-bearing capacity as the pipes with which they are to be laid. It is therefore recommended that they should be surrounded by suitably designed in-situ concrete where significant load conditions have to be met, or where anchorage of the pipeline is required. Bends have the same manufactured internal diameter and wall thickness as the pipes with which they are to be laid.

Perforated Pipes

CPM manufactures precast concrete perforated pipes up to 600mm diameter that transport and distribute storm water into the rock filled trench and eventually into the surrounding area through the circular perforations.

Concrete perforated pipes are suitable for field drains or french drains.

Perforated pipes comply with the Department of Transport Specification for Highway Works, with requires the total are of drainage holes should not be less than 1000mm2 per metre length of pipe.

If you require a larger diameter than 600mm please contact our specials team who may be able to help on 01179 812791 or sales@cpm-group.com

Ovoid Flexible Pipes

Ovoid concrete pipes are produced and tested in accordance with the relevant provisions of BS EN1916:2002/BS5911-1:2002 including dimensional tolerances, crushing, hydrostatic, water absorption and joint tests.

The ovoid pipe has better velocity characteristics at low flows than equivalent circular pipes, which provides:

Lower operating costs, where some sewers may be laid without the need for pumping.

Better self cleansing and therefore less risk of siltation and blockage. Reduced costs of trench excavation resulting from shallower gradients.

Nominal Internal Size Socket O/D Barrel O/D Overall

Length (mm)

Effective Length (mm)

Width of

Base (mm)

Weigth per

Pipe (tonne

)

Metres per

TonneWidth (mm)

Height (mm)

Width (mm)

Height (mm)

Width (mm)

Height (mm)

400 600 840 840 772 772 1350 1250 N/A 910 1370600 900 900 1210 800 1185 2610 2500 375 2170 1150800 1200 1100 1545 1040 1510 2620 2500 490 3300 760

The 600x900 & 800x1200 ovoid pipes are supplied with two lift anchors cast in the top for use with 'Flexilift' lifting/jointing system.

'C' hook available for lifting/jointing 400x600 ovoids. Lifting/jointing equipment can be supplied on request Short lengths of either spigot/socket butt pipes can be supplied for building

into the manhole wall for the 600x900 and 800x1200 ovoids and are 1250mm long and 625mm long for the 400x600 pipe.

Junctions can be fitted and can be made from drainage material other than concrete

Cross section of ovoid pipe 600 x 900 and 800 x1200

Installation of ovoid pipe with flexible joint seal

Cross section of ovoid pipe (400x600)

External dimensions - barrel 770 socket 840

Ovoid pipe 400x600

Standard form 1 ovoid

(400mm x 600mm R= 200mm)

(600mm x 900mm R=300mm)

(800mm x 1200mm R=400mm)

'C' hook for lifting and joining

Please download Tables of capacities and velocities for ovoid pipes here

Handling and Jointing of CPM Precast Concrete Pipes

CPM recommends that prior to laying the pipeline all products and equipment is checked to ensure that they are in good working order.

Wherever possible, precast concrete pipes and other products should be off-loaded in the reverse order to that they were loaded in. The vehicle must be secured at all times and off-loading should take place at the closest hard standing area to the point of installation; all products must be left in a safe position well clear of the edge of the trench

Handling

1. Avoid damage when handling, especially to ends of concrete pipes and never drag or roll pipes over rough ground.

2. Use correct craneage for offloading, utilising canvas/fabric slings with central lift or if ordered, large diameter pipes incorporate lift pins for which the propriety head link and chain set can be used.

3. Pipes should be handled individually using a properly designed 'C' hook, beam sling or other purpose-designed system. Small diameter pipes may be slung through the order to avoid damage to jointing surfaces and consequent leakage of the laid pipe.

4. A pipe lifter is available for certain diameters which can offer improved site safety, reduced installation times, labour and cost savings, please ask our sales team for details on 01179 812791 or email sales@cpm-group.com

5. Joint rings (when supplied loose) must be stored away from sunlight, heat or possible contact with any oils.

6. Stack pipes on even ground on timbers to protect sockets and spigots, making sure the bottom row is securely chocked.

To see how a pipe lifter can make site working easier and safer please visit https://www.youtube.com/watch?v=EHd32IzU3QE&feature=youtu.be

Jointing

Prior to jointing, the concrete spigot and socket should be cleaned and inspected to ensure they are in good condition.

For Integral seal joints

Remove the protective polystyrene strip by using the take provided. Grip the tab of the tape and pull firmly towards the centre of the pipe Lubricant should be applied to the spigot end of the pipe, ensuring the radius

area and entire length of the spigot is covered.

Additional lubricant may also be applied to the seal face to assist jointing.

Enter the spigot carefully into the socket and ensure that the pipes are correctly aligned

CPM integral pipes should only be jointed using a CPM approved lubricant which is available from our sales team on 01179 812791 or email sales@cpm-group.com

For roll ring joints

Stretch and position the seal onto the spigot of the pipe and ensure it is not twisted. Even out the stretch by lifting and releasing at several points around the spigot.

The seal should now be located on the spigot Offer the pipe spigot to the socket, but keep clear of engagement by 25mm so

that the joint ring is not disturbed. Enter the spigot carefully into the socket ensuring that the gasket is correctly

positioned and that the pipes are correctly aligned.

For larger pipes use of 'Flexilift' lifting/jointing chains

For 1200mm pipes and above, plus larger size ovoid pipes, CPM recommends the use of the 'Flexilift' lifting system where special lifting anchors can be cast into the concrete pipes at manufacture. 

1. Use the equal length chains C1 and C2 for lifting and placing each pipe in the trench.

2. Connect the longer length chain, C3, to the pipe already laid and place the shorter length chain, C2 on the hook provided. The pipe can then be jointed without moving the jib of the crane.

Details of how to engage the universal head-links are shown below.

   

Airtest of Flexible Jointed Pipe

CPM strongly recommends that testing of the pipeline is undertaken periodically and regularly during the pipelaying process, i.e. every third pipe and immediately following each junction installation. The air test is not covered by BS EN 1916:2002/BS5911-1:2002, but a pipe which complies with the standard will usually comply with the air test. Failure to pass the air test will not preclude the acceptance of the pipeline if a successful water test can be achieved.

Ensure the test equipment is in good condition. Inflatable stoppers are recommended for ease of use, which are light and reliable.

The test should be carried out after every 3 or 4 correctly laid and jointed pipes prior to commencement of backfill.

Connect 'U' gauge (manometer) to the test nipple of the drain stopper by means of rubber tubing.

Raise the internal pressure of the system until the 'U' gauge indicated slightly more than 100mm (a) water gauge (50mm where gullies are connected)

A successful test is achieved if the equipment shows a fall in pressure of no more than 25mm after 5 minutes, having allowed a suitable period for stabilisation.

If the pressure falls sharply and the pipes appear to have failed, the following checks must be made before contacting CPM for assistance:

o Check the test equipment is in good condition.o Check if the stoppers are leaking - use industrial soap around the edge

of the stopper to provide an effective seal, if necessary.o Check the joint rings are correctly located.

Dramatic temperature changes both in and out of the pipe could affect the air test. Reference should be made to BS EN 752

If after following the guidance on this advice sheet you still have problems with our product, please contact the supplying works in the first instance, on the following telephone numbers or the technical department advice line on 01902 356220.

Mells - 01179 812791

Newmains - 01698 386922

Pollington - 01405 860591

CPM regrets that failure to follow the advice given may result in any subsequent claims being invalid or in a call out charge being made if CPM technical personnel have to attend on site.

When installing concrete pipes always ensure compliance with all current Health and Safety legislation, and the CPM Group Ltd health and safety product data sheet.

Please note:

1. All dimensions are approximate and subject to change2. Seals are normally SBR complying with BS EN 681-1:1996. Other compounds

such as Nitrile or EPDM can be supplied but may not be available from stock.3. Pipes supplied with an in wall joint - no bell socket (full flexibility at joint

maintained).4. CPM specialised Flexilift system for handling/jointing purposes for pipes

DN1200 to DN1800 is available.5. Lorries with crane offload facilities are available for pipes up to DN 600 upon

request, although site assistance would be required on certain diameters.6. When ordering pipes which may have to joint with pipes already on site or

previously laid, particularly extensions to contracts, it is important to advise the sales office accordingly in order to eradicate any jointing problems.

7. Flexible jointed concrete pipes can be supplied with perforations.8. CPM lubricant is advised for use on integral jointed pipes. CPM cannot

guarantee that jointing of pipes with the use of other lubricants will be successful.