Piping adjustment works Activated carbon filters Oelegem 1

The assignment concerns adjustment work on the piping of the Activated Carbon Filters of the Water Production Center Oelegem 1. Activated carbon filters serve for the removal of dissolved organic micro-pollutants and tastes and odors from the water, through adsorption and biological degradation, in order to meet the quality requirements for drinking water production. The installation dates from the early 1990s and is still in service and consists of 12 filters. The piping consists of steel that has been coated on the inside and outside. This coating shows strong rust formation on the inside. There are cracks in the coating in various places on the outside, causing local corrosion. For the sake of necessary continuity of production, the works must be carried out in phases, over an estimated period of approximately 550 days. In this assignment, the piping must be dismantled where necessary. The parts that were concreted in need to be adjusted in some places. Stainless steel pipe parts must be inserted and welded through these concreted pipes. These stainless steel parts must then be connected to the adapted steel parts by applying flanges to both parts or a thickening on the stainless steel where it is connected with a stainless steel coupling. The modified pipework will be recoated via a separate order (not included in this contract). This is followed by installation and recommissioning of the filter. Communal facilities should also be treated in the same way. In some cases, the contractor must provide replacement parts in steel that can be used when the dismantled parts are recoated. These must be supplied directly to the coatings company. Unpredictability of drinking water demand and parallelism of coating mean that the contractor is required to be flexible when changing the planning without additional costs. One filter was already onion