053dupplex

uPONOr duPPLEx SEWEr SySTEM 79

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Dupplex - robust double-wall piping system for sewer drainage

UPONOR INFRASTRUCTURE

uPONOr duPPLExSEWEr SySTEM

80 uPONOr duPPLEx SEWEr SySTEM

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5.3 Uponor Dupplex Sewer System

The dupplex pipe outperforms all cur-

rent European standard requirements for

under ground sewer systems. In addition,

dupplexs strict quality requirements

further enhance the system's reliability.

dupplex pipes are equipped with fixed

sockets which, together with a sealing

ring, ensure easy and secure coupling.

After socket welding, all pipes are tested

for tightness as part of continuous pro-

duction quality control inspections. The

dupplex system is delivered with standard

seals or oil/petrol resistant seals, as re-

quired. Its standard sealing rings are made

fromstyrenebutadienerubber(SBR).Oiland petrol resistant seals are made from

nitrilerubber(NBR)andmarkedyellow.

The uponor dupplex Sewer System is

designed for gravity sewerage applica-

tions.Dupplexisapolypropylene(PP)double-wall sewer pipe with a smooth

inner wall and a corrugated outer wall.

The systems ring stiffness is SN 8.

The uponor dupplex and uponor ultra

rib 2 sewer systems both use the same

fittings range. These fittings are also

used with the uponor PP Stormwater

System. The entire system meets SN

8 ring stiffness requirements and all

components are made uniformly from

PP. Coloured terra cotta on the outside,

the pipe has a light grey inner surface,

providing optimum visibility during

camera inspection.

Pipe dimensions

Table 5.3.1

Outside diameter Inside diameter (mm) (mm)

160 142

200 174

250 216

315 277

400 351


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Properties PP Unit Standard/test method

density 900 kg/m3 ISO 1183

ring stiffness Pipes SN8 kN/m2 ISO 9969

Fittings SN8 kN/m2 ISO 9969

Long-term elastic modulus E50 425 MPa ISO 527-2

Short-term elastic modulus E0 1650 MPa ISO 527-2

Thermalexpansionfactor 0,18 mm/mC

Thermalconductivity 0,22 W/mC DIN52612/23C

Maximum continuous operating temperature 85 C

Maximum momentary operating temperature 100 C

Max. angle of joint deflection 2

System and material specifications

Table 5.3.2

81


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Approvals

The dupplex system carries the Nordic

Poly Mark and is INSTA-CErT certified

and approved in the Nordic countries

(Finland,Sweden,NorwayandDenmark).

SEWEr duPPLEx PP dN/ON 200 SN8 ud EN 13476 2007

Markings

The markings for uponor dupplex piping

are explained in the figure and table below.

Approvals & Markings

INSTA-CErT certificates for all uponor

products can be viewed on our website at

www.uponor.fi.

SEWER DUPPLEX PP DN/ON 200 SN8 UD

Manufacturer Application Product Material:

polypropylene

Nominal outside

diameter

Stiffness

class

Application area,

ud= underground

drainage and sewerage

within the building

structure and outside

the building

EN 13476 2007Nordic Poly Mark Product

standard

Snowflake symbol.

Pipe can be handled

at low temperatures

Production unit

= Forssa, Finland

Production date:

month/year

Table 5.3.3


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Dupplex Sewer System Design

Structural design

The Structural design section of the

drainage and Sewer Systems chapter

specifies a number of design criteria for

which generally applicable experience-

based data exists. If these criteria are

met, no additional design calculations

arerequired.

Flow design

When determining the pipe systems

dimensions, to ensure trouble-free opera-

tion it is important to ensure that the sys-

tem has sufficient flow and self-cleaning

capacity. The main design principles are

presented in the introduction section of

the drainage and Sewer Systems chapter.

Based on a roughness coefficient value

of 0.25 mm, flow charts for dupplex pipe

systems are presented in appendices 3.1,

3.2 and 3.3.

Although pipe size is expressed using the

outside diameter, the charts are based on

the inside diameter.

After the pipe design phase, the self-

cleaning capacity and pipe gradient must

be determined based on the chosen pipe

size and design flow rate. For this pur-

pose, self-cleaning diagrams of different-

sized dupplex gravity sewer pipes are

presented in appendices 4.1 4.5.


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This section gives step-by-step instruc-

tions on the jointing and coupling of

dupplex pipes and fittings.

1. Using a fine-tooth saw, cut the pipe

between the ribs. Deburr the cut edges

with a blade or file.

2. To ensure optimal tightness, fit a seal

into the first groove from the pipe end.

3. Apply lubricant to the inside of the

socket. To facilitate jointing, also apply

lubricant to the spigot end sealing ring.

Ensure that no sand or grit adheres to

the lubricated areas.

Dupplex Sewer System Installation

dupplex pipes use the same fittings as the

PP Stormwater System and the ultra rib 2

sewer system.

Coupling Dupplex sewer pipes


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4. The joint is complete when the pipe

end is pushed all the way to the base of

the socket.

6. Uponor Sewer System

A correctly coupled Dupplex joint.

5. The pipes can also be slotted together

by levering against the rearmost socket,

e.g. with a crowbar. When doing so, to

avoid damaging the socket position a piece

of wood between the socket and crowbar.


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Coupling a Dupplex spigot end with

a concrete spigot end

Fit the sealing ring onto the spigot end of

the concrete pipe. Align the adaptor and

push it fully home, so that the concrete

pipe sits against the base of the adaptor.

Carefully(donotusegastorch)applyheat to the coupling, to form a tight joint.

No lubricant is used in the joint.

Coupling a Dupplex spigot end with

a concrete pipe socket

Fit the seal onto the adaptor so that the

spigot end of the seal is towards the

concrete pipe socket. Push the adapter

into the pipe socket; the seal will roll into

place. No lubricant is used in the joint.

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