The Northern Relief Sewer Line (NRSL) forms a vital link for the city’s wastewater reticulation, and the project involved replacing existing pipework with 1250m of new DN1400 GRP pipe and fittings.
The NRSL collects approximately a third of Christchurch City’s wastewater from the northern and western areas of the city and conveys it to Bromley Wastewater Treatment Plant for treatment and discharge.
The NRSL forms a vital link for the city’s wastewater reticulation, and the project involved replacing existing pipework with 1250m of new DN1400 GRP pipe and fittings.
The SCIRT Engineers chose GRP pipe and fittings for ease of installation, strength, and resilience to Hydrogen Sulphide attack along with being lightweight for ease of installation.
The contractor was keen to lay the pipe and then retrofit the DN1400/1000 GRP Tess that forms the manway access to the new sewer line. Hynds and Superlit were able to provide an economic solution by offering retrofit GRP saddles, installed in situ by Gillies Metaltech, a Superlit-certified fabricator for GRP fittings. The installation required specialised confined space access that GMT were able to meet along with full QA of all work completed.
Project
Stronger Christchurch Infrastructure Rebuild Team
Client
SCRIT
Location
Christchurch
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