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solutions could be adopted:
WATER MANAGEMENT FOR CONSTRUCTION • Installation of side stream filters on cooling
AND PC&C water networks
In the industrial plant, one of the biggest en- • Implement a continuous blowdown on boi-
vironmental impact is related to water con- lers, controlled by a conductivity sensors
sumption in different application and activities, • Use of stripped sour water as make-up wa-
such as: ter to crude desalter
1. Industrial water used for cleaning purposes, • Use HP boiler blowdown as make-up water
utility stations, for fire extinguishing and as to MP and LP boilers
feed to water preparation units (e.g. service • Use condensate from turbines as make-up
water) water to cooling towers
2. Hydrotesting: The test involves filling the • Use storm water as fire water
equipment and piping with water for detec- • Maximization of air blowing as method to
ting leak throughout the system. clean piping and equipment (e.g. Low Pres-
3. Dust control: water used to capture or make sure Steam header and relevant network)
inert dust produced during handling, drying
or other process operations.
4. Concrete preparation: water used for con- Technip Energies has
crete batching.
introduced new practices
The main industrial effluents can be produced “and work processes on
during production activities (e.g. utilities produc- construction sites during
tion and process effluents), construction (e.g.
hydrotest effluents), cleaning activities (piping the Pre-commissioning
cleaning during PC&C). These effluents shall be and Commissioning phases
treated before discharge or reuse in dedicated
plant unit or in an external treatment unit. to achieve the expected
sustainability objectives
The philosophy related to water management
shall be focused on the most sustainable choi-
ces giving the following targets: During the construction and commissioning
• Reduction of water consumption and di- phase, hydrotesting and system cleaning repre-
scharge (upstream) sents the largest volume of water consumption.
• Enhancement of all reuse and recycling so- Hydrotesting involves testing the critical com-
lutions in place of water treatment (down- ponents of a plant such as the piping systems,
stream) gas cylinders, boilers, and pressure vessels. It is
done by completely filling the components with
The discharge of water shall be considered the a liquid, usually water and pressurizing the sy-
last option applicable and the entire water ma- stem to confirm integrity (no leaks). During com-
nagement strategy should follow the principles missioning activities, water is used to clean the
of Reduce, Reuse and Recycle. During the last systems (pipes mainly), with or without inhibitors
years, Companies has implemented solutions to for flushing, hydro-jetting, chemical cleaning,
reduce the water consumption and final dischar- steam blowing. An example of integrated water
ge. With an eye on design phase, the following management strategy with reuse application is

Impiantistica Italiana - Gennaio-Febbraio 2024 27