Rehabilitation of a 6-kilometre asbestos cement main

Ageing potable water trunk main supplying around 8,000 inhabitants near Bosa in Sardinia

System

Rehab

Medium

Water

Application area

Utility

Line type

Water main

Country

Italy

Region

Sardinia

Situation

Frequent breaks and leakages in the pipeline led repeatedly to interruptions in water supply, since this pipe is the only supply line in the area. It runs through the Temo river valley to a dam and was deemed for a trenchless rehabilitation right from the start.

Special features

A variant study concluded significant technical and economic advantages of Primus Line®

No excavations required since the existing pipeline could be accessed via several existing manholes

Ensured supply with drinking water due to installation of a bypass during the rehabilitation period

Technical details

Material of host pipe

Asbestos cement

Diameter of host pipe

DN 500

Transported fluid

Potable water

Operating pressure

16 bar

Total length

Main line: 6,178 m | Bypass DN 400: 1,000 m | Bypass DN 350: 1,300 m

Number of sections

Main line: 6 installation sections | Bypass: 3 installation sections

Why Primus Line?

Safety and cost-effectiveness

Safe and cost-effective rehabilitation in a difficult-to-access and mountainous terrain protected by numerous environmental regulations

Minimised installation risk

By installing a fully factory-produced and quality-controlled product, the installation risk at the site was significantly reduced

Reduced risk of dispersing asbestos fibres

in comparison with open trench

Minimised time frame for construction

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