Operating mode

What we do

As we generally do not know the overall condition of installed tanks (mainly the internal aspect), for appliances nearing their reclassification date, we systematically carry out two different and separate interventions (inspection and reclassification).

This is essential to check the feasibility of the reclassification, on the one hand, and the existence and the condition of the installation's safety organs, on the other.

 For all additional information (cost of intervention, spare parts, etc.), note the information on the manufacturer's ID plate on the tank (ID number, service pressure, test pressure, date of first test and year of manufacture). Charlatte and its after-sales division manager are on hand to help you.

Inspection procedure

This inspection procedure can be broken down into 15 different steps to be performed by Charlatte's after-sales technician, the customer, or jointly. It is important to follow the order of the procedure for best results.
  • By Charlatte
  • By the customer
  • Jointly
Get the right documents
Charlatte's after-sales technician starts the procedure by obtaining all the necessary documents for the work. This means the original test report for the equipment (pressure tanks) and the descriptive statement of the tanks. If it is a bespoke tank, the technician must also obtain the plans with dimensions. If the tanks to be inspected are not CHARLATTE tanks, the customer must provide the above-mentioned documents.
Isolate the tank
While our technician carries out the inventory of the documents required for the inspection, the customer is responsible for stopping the equipment and isolating the tanks so that work can be safely carried out.
Empty the tank of water
Once the tank has been isolated from the network, the technician will empty the water tank.
Empty the tank of air or nitrogen
After the water has been emptied, the tank must be emptied of air (or nitrogen).
Open the tank
As soon as the tank has been fully emptied, the Charlatte technician will be able to open it by removing the inspection orifice (if there is one).
Inspect the walls
Once the tank is open, the internal condition of the walls can be viewed and any traces of corrosion detected. An initial visual diagnosis of the condition of the water tank can be made.
Measure thicknesses
After a visual analysis of the overall condition (internal and external) of the tank, the second essential step is to measure the thickness of the materials. These measurements are carried out using digital measuring devices which work by ultrasound. The calibration documentation for the devices and calibration tolerances are available from the technician. Once the visual analysis and thickness measurements have been made, three different situations may arise: 1. The thicknesses comply with standards for pressure equipment and there are no traces of corrosion, therefore the tank is in perfect condition and can be put forward for possible reclassification. 2. The thicknesses correspond to standards, but a few traces of corrosion are detected on the internal walls of the water tank, therefore internal renovation of the tank is necessary (sanding + painting). The cost of this operation is to be borne by the customer and the work may be entrusted to a specialised body. Charlatte is capable of this renovation. However, the customer must remove the tank and get it to Charlatte's workshops in Migennes. 3. The thickness measurements are inadequate in relation to standards or welds are corroded. The tank will be declared unserviceable. It will be recommended to change it as quickly as possible to comply with current regulations.
Inspect the existence of safety accessories
A verification of the existence of safety accessories will now be carried out. Our technician will check that the different accessories on the tank (valves, levelling equipment, isolation valves, etc.) are working properly. Special attention shall be paid to safety accessories. If there is no safety valve, the customer will be asked to supply the pressure valves of the pumps in order to check that the tank does not operate above its service pressure.
Replace the seal
Before closing the tank, the technician will replace the inspection orifice seal to ensure the tank is perfectly watertight when it is put back into service.
Close the tank
Now that the internal and external visual inspection of the tank and the thickness measurements have been done, the technician can close the tank by tightening the inspection orifice.
Fill the thank with air or nitrogen
After closing the tank, the Charlatte technician will fill the tank with air. If the customer requires nitrogen, it is up to him to supply it. We remain at your service to calculate the necessary quantities. After filling, the tightness of the tank will be checked via bubble leak detection.
Re-commissioning of the tank
The tank will then be connected to the network in order to be started up again.
Fill the tank with water
After filling with air, the tank can then be filled with water. Operational tests and a final inspection of tightness will then be carried out.
Create the acceptance form
The technician now has to ask the customer to fill in and put his initials on the completion of work acceptance form (AQ 0271).
Write and send the inspection report
The inspection procedure is finished. The customer will receive the inspection report (AQ 0049) written and sent by post, stating the conclusions of the work carried out and the general condition of the tank.