Thermoplastic pipes are being used in the industrial fields like water, sewage and gas piping systems and other industrial applications, like the transport of minerals and slurries. Choosing the PEX-AL-PEX pipe depends on many criteria. Firstly, all depends about the conditions useful for each kind of material. Secondly, it all depends on the cost of the chosen material and finally the mastering of your material’s scenarios of failure.
The final criteria are possible through the mastering from the material characteristics along with the ability to detect the failure, burst or crack, before its occurrence. The adopted approach has to be proactive to facilitate the prediction from the failure and help the maintenance staff to apprehend the piping system’s damage with the right time. In this paper, we chose HDPE pipes as material for our own study. Then, we leaded a brand new approach of failure analysis and prediction using new models. These models are obtained through a modified version in the stress controlled unified theory, a static damage model using burst pressures along with a static damage model making use of the a chance to failure. For this reason, we used burst pressures of undamaged HDPE pipe fittings as opposed to ultimate stresses. Then, we created groove notches with some other levels of depth.
The obtained burst pressures from all of these pipes are already considered as the residual burst pressures utilized in our damage models. The representation of the obtained data in accordance with the life fraction gave us an understanding concerning the critical life fraction and therefore the critical groove depth that may be allowed. These details has been confirmed by three damage models. Then, we determined the numerous stages of damage to assist the predictive maintenance to define the safe intervals of your PEX-AL-PEX pipe. Moreover, the 3 developed models, presented within this paper, represent a simplified approach to measure the damage according to static tests only, without having done any dynamic tests. The developed inexpensive approach can be a tool which can help the industrials to get 18dexkpky anticipative maintenance strategy and respect the protection requirements. Also, it can help these people to do quick checks or launch audit pursuit to the manufacturers’ factories for HDPE pipes’ quality control and conformity check concerning the codes.