Charlotte Pipe latest app, Tech Tools provides simple, on-the-go tools for the industry. The new app features an expansion and contraction calculator and a temperature de-rating calculator. The expansion and contraction calculator provides general direction in the expansion loop, offset or change of direction design. This will account for the effects of expansion and contraction in PVC and CPVC systems. These plastic piping systems will expand and contract four to five more times than a metallic system. The temperature de-rating calculator lets users calculate the operating pressure of PVC and CPVC piping systems as the operating temperature rises above 73° F.