I have no idea what is relevant or irrelevant for you.
For example, for me to find-out information by Google is relevant, but I’ve discovered it’s relevant to know some basic words for searching, I mean using hands for asking the display was not relevant…
May you find relevant to buy a book on the subject? I recommend you "Pipeline design and construction: A practical approach". This book has a lot of good information on the subject. It includes relevant words as "localized stress in the pipe", "excessive local stress" "pipes operating with high hoop stress" and so on. You must spend your money to buy it- this would be relevant. But I can see for you is relevant to improve your education so this shouldn’t be a problem.