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New pipework is dirty. It contains mill scale from manufacture, welding debris, swarf, flux residue and installation oils. If that is not removed before the system runs, it blocks valves and strainers, fouls heat exchangers, and seeds corrosion for the life of the asset. Chemical flushing & pre-commission cleaning removes it, passivates the metal, and produces the documentation the commissioning file needs. The same applies to shop fit-outs in malls and commercial buildings — new tenant pipework should be flushed before it ties into the building's chilled water system.
Pre-commission cleaning is the one chance to start a system clean. Everything left in the pipework at handover stays in the pipework — it circulates, lodges in the worst possible places, and becomes somebody's maintenance problem for the next thirty years.
It is also deadline-driven work. Flushing sits on the critical path immediately before commissioning, which means it is the step most likely to be compressed when a project runs late. That compression is exactly how a brand-new chilled water system acquires a twenty-year fouling problem in its first week.
Flushing is deadline work, and we plan around your programme. But the standard is the standard — a flush signed off without meeting it is a document, not a clean system, and the difference shows up years later as fouling nobody can explain.
This is the cheapest moment in an asset's entire life to make it clean, and the cost of skipping it is paid by somebody else, later, at a much higher rate. Debris left in a new system fouls heat exchangers from day one, blocks strainers, and starts under-deposit corrosion beneath deposits that should never have been there — see metal corrosion in water systems. The saving is measured in days on a programme; the cost is measured over decades. That asymmetry is the whole subject of the real cost of doing nothing.
No. Existing systems suffering poor flow, blocked strainers or reduced heat transfer are often carrying debris or fouling that a chemical clean will remove. New-build is the most common case because it is the one chance to start clean.
It depends on system volume, layout and how dirty it is. We scope it from the drawings and the site, and we plan around the commissioning programme — but we will tell you honestly if the time available is not enough to reach the standard.
A flushing report documenting what was done and the water quality achieved, for the commissioning file — plus a system handed over passivated and inhibited rather than bare.
Yes. New tenant pipework in malls and commercial buildings should be flushed before it ties into the building's chilled water system — otherwise the mill scale, welding debris, swarf, flux residue and installation oils it carries circulate into the landlord's plant and become somebody's maintenance problem for years.
Send us the drawings and the programme dates and we will quote the flush.