Project Planning – Design & Maintenance Tips
- Perform a risk assessment of the installation to assess the consequences of flooding due to blockages of silt and scale build up within the pipe system. Repeat this assessment for unexpected hydraulic demands due to accidental spillage,thunderstorms and extraneous events.
- Perform the necessary risk assessment if the system is likely to be subjected to thermal shock. Within design limits, ACO Pipe is particularly tolerant of sudden temperature changes without risk of damage.
- Avoid selecting pipe sizes that are at,or close to, their hydraulic capacities,as the long-term effects of silt and scale can reduce a system’s hydraulic capacity over time.
- For storm water applications, check the geographical location to confirm the design rainfall intensity.
- Confirm the actual gradient of the installed pipe system. A level (or nearly level) gradient will have a reduced hydraulic performance compared to installations with defined gradients.
- Assess the fluids to be drained in the system to avoid corrosion of the pipe and/or seals. Checklist as follows:
– Identify each chemical contained in the fluid.
– Establish chemical concentration(s).
– Confirm maximum temperature of the solution.
- Given the above information, the correct seal (see here for more information) can be selected.
- Design the system with the minimum number of joints and limit the number of bends. This will help to reduce both costs and hydraulic losses.
- Provide good access points for cleaning/rodding to maintain the hydraulic performance of the system.
- Care should be taken to avoid damage, both during and after installation, as dents and kinks will affect the hydraulic performance. For above ground applications, damage will also affect the system’s aesthetics.
The following standards will assist designers select the correct size of pipe system for a particular application:
EN 12056: Gravity Drainage Systems Inside Buildings.
EN 752: Drain and Sewer Systems Outside Buildings.
Installation should be in accordance with the manufacturer’s recommendations, EN 12056–2, EN 12056–3 and EN 752.
Designers must ensure that all pipework is supported with brackets according to the requirements of AS/NZ 3500.