Polypipe Terrain POLYPIPE TERRAIN FUZE DRAINAGE SYSTEM ...

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Figure 1Polypipe Terrain FUZE jointing methodsbutt weldscrew-threaded couplingelectrofusion couplingexpansion socketring-seal socketflange jointAssessment and Technical InvestigationsThe following is a summary of the assessment and technical investigations carried out on the Polypipe Terrain FUZEDrainage System.Design Considerations3 General3.1 Polypipe Terrain FUZE Drainage System pipes and fittings are satisfactory for use in domestic, commercialand public buildings and in installations designed in accordance with BS EN 12056-2 : 2000 andBS EN 12056-3 : 2000 for the conveyance of surface water and domestic sewage as is permitted to bedischarged into public sewers by the Public Health Act 1936 (England and Wales), and surface water and sewage asis permitted and defined by the Sewerage (Scotland) Act 1968 and the Water and Sewerage Services (NorthernIreland) Order 1973.3.2 The average linear expansion coefficient for Polypipe Terrain FUZE Drainage pipes is 2 x 10 –4 m·m –1·°C.Installations must be designed to accommodate or prevent the anticipated thermal movement as follows:Prevention of longitudinal thermal movement3.3 Movement can be prevented by embedding the pipe (with electroweld sleeves or bushes) in concrete or by rigidfixings.Embedment3.4 The adhesion between concrete and pipe is inadequate to prevent movement. When installed within concretefloors the movement is prevented by the use of electroweld sleeves or bushes which protrude from the external surfaceof the pipe. These fittings must be used near each branch connection. Ring-seal sockets should not be embedded inconcrete. The expansion and contraction forces created by thermal movement must be accommodated by the concrete.Page 12 of 16
Rigid installation3.5 The forces exerted on pipe supports, anchors and the structure must be considered when this approach is used.Rigid fixings are not considered suitable for pipes over 160 mm in diameter. Guidance on the load exerted on fixingsis available from the manufacturer.Accounting for length/longitudinal movement3.6 Vertical and horizontal expansion can be catered for by the expansion socket. The product is designed to copewith the expansion equivalent to a 5 m run of pipe through a temperature change of 80°C. This product should beused in conjunction with rigid anchor fixings and sliding guide hangers. Sliding guide hangers are not provided as partof the system, but are available as proprietary products.3.7 Thermal movement can also be accommodated by the incorporation of a deflection leg within the design of theinstallation of the system. The maximum anticipated movement is determined, and the length of the required deflectionleg appropriate to the predicted movement. Sliding supports allow the pipe expansion to occur between two fixedsupports in the structure.4 Practicability of installationInstallation of the pipes and fittings is achieved easily providing the procedures detailed in the Polypipe Terrain FUZEDrainage brochure are strictly adhered to (see also section 14 of this Certificate).5 Strength5.1 Polypipe Terrain FUZE pipes and fittings will have adequate resistance to the types of loading associatedwith installation and normal service conditions.5.2 The system should be protected from impacts, for example from heavy vehicles such as fork-lift trucks used oncommercial premises.6 Performance of joints6.1 The joints will not be adversely affected by thermal movement provided the correct provision is made.6.2 The joints will remain watertight under conditions of pipeline movement in excess of those expected to occur innormal good drainage practice.7 Flow characteristics7.1 A system incorporating Polypipe Terrain FUZE pipes and fittings will have satisfactory flow characteristics.Primary ventilated stack systems to BS EN 12056-2 : 2000, clause 4.3.1 and Table 1, are restricted inaccordance with clause 6.5.1 and Table 11. For flow capacity calculations, ball fittings should be consideredas having square entries.7.2 Use of ventilation branches in a stack allows the design capacity of a 110 mm primary ventilated stack to beincreased to 8.7 l·s –1 maximum, and the 160 mm diameter to 18.1 l·s –1 maximum, thus avoiding the need foradditional ventilation (see Table 24). The stack design must be in accordance with the Certificate holder’s guidelines(see Figure 2). A ventilation branch fitting must be installed at each floor above the ground floor, even if appliances arenot connected. The ground pipe must be 160 mm in diameter and a pressure relief line must be installed at the bend atthe bottom of the stack.Table 24 Maximum flow rates of waste in the stacks with ventilation branchesStack diameter Total flow dischargable Maximum project flow Maximum number of connectableDN De in the stack in the stack equivalent apartments(mm) (mm) ( DU) (l·s –1 ) (Q ww) (l·s –1 )100 110 303 8.7 45150 160 1310 18.1 195Page 13 of 16
Page 1 and 2: Polypipe TerrainNew Hythe Business
Page 3 and 4: øGeneralThis Certificate relates t
Page 5 and 6: øøøøøTable 688° 30’ equal b
Page 7 and 8: øøTable 14 Soil pipes — access
Page 9 and 10: Table 19 Soil pipes — 135° doubl
Page 11: Table 23 Soil pipes — ventilation
Page 15 and 16: 10.3 In Scotland and Northern Irela

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