Non metallics provide significant benefits to oil and gas industry, such as improving corrosion issues, possibly cost efficiency and easier asset management. The global demand for non-metallics has been growing at fast rate as the non-metallic operating envelope and life cycle cost have become more competitive due to the need to replace the traditional steel pipelines.
The use of non-metallic pipelines is increasing, therefore we were encouraged to seek any available data on non-metallic pipelines, analyze them and arrive to conclusions which will support decisions in terms of safety. In this effort, researched information on public domain obtained an almost comprehensive set of data related to non-metallic pipelines. The main observations (i.e. takeaways) of the analysis are:

The overall failure frequency (period 2016-2019) for non-metallics appears higher by 36% than the metallic ones. Even though this statement appears to be true in general (i.e. holistic view), an exception is observed in relation to polyethylene pipelines which appear to have failure rates much lower than any other metallic (either steel or stainless steel) pipelines.
There is a significant difference (more than twice an order of magnitude in number of incidents per 1000km.yr) between metallic and non-metallic pipelines with respect to construction deficiency, as it appears that non-metallic pipelines are more susceptible to handling damage during installation, alignment, backfilling, overbending, etc.