Identification of the causes of defects in the pipes of the hot water supply system of an apartment building
The existing hot water supply system of a 17-storey apartment building commissioned in 2010 is considered and its scheme is described. A laboratory study of the dismantled sections of the defective pipeline was carried out. It is shown that the entire inner surface of the pipe is covered with longitudinal cracks of uneven shape, different lengths and depths. A microscopic examination of the pipe section revealed areas of insufficient adhesion of the reinforcing layer with the inner layer of the polypropylene pipe. It is established that the main reason for the appearance of pipe defects in the form of numerous cracks, the formation of bubbles and fracture with a short service life is associated with the formation of a rupture of bonds between layers and the use of low-quality polypropylene pipes.