Thermoplastic pipes are used in the industrial fields like water, sewage and gas piping systems as well as other industrial applications, just like the transport of minerals and slurries. The choice of the PEX-AL-PEX pipe depends on many criteria. First of all, this will depend on the conditions of use for each sort of material. Secondly, all depends on the price of the chosen material and ultimately the mastering in the material’s scenarios of failure.
The last criteria are possible with the mastering of the material characteristics and also the capacity to detect the failure, burst or crack, before its occurrence. The adopted approach needs to be proactive to facilitate the prediction from the failure and assist the maintenance staff to apprehend the piping system’s damage with the proper time. In this particular paper, we chose HDPE pipes as material for the study. Then, we leaded a new approach of failure analysis and prediction using new models. These models are obtained by way of a modified version in the stress controlled unified theory, a static damage model using burst pressures plus a static damage model while using a chance to failure. For this reason, we used burst pressures of undamaged HDPE pipe fittings instead of ultimate stresses. Then, we created groove notches with different degrees of depth.
The obtained burst pressures from the pipes have already been viewed as the residual burst pressures utilized in our damage models. The representation of your obtained data based on the life fraction gave us a perception in regards to the critical life fraction and therefore the critical groove depth which can be allowed. This information has been confirmed by three damage models. Then, we determined the numerous stages of injury to help the predictive maintenance to define the safe intervals of your PEX-AL-PEX pipe. Moreover, the three developed models, presented with this paper, represent a simplified approach to look at the damage according to static tests only, without having done any dynamic tests. The developed cost-effective approach might be a tool that can help the industrials to get 18dexkpky anticipative maintenance strategy and respect the protection requirements. Also, it will also help these to do quick checks or launch audit mission to the manufacturers’ factories for HDPE pipes’ quality control and conformity check regarding the codes.