The photo is from somewhere I visited for work. I didn’t want to write all the technical details of all the considerations go into adding safety valves, I just wanted enough to relate it to a common human experience. Maybe others can lead me to other engineering poetry. The only similar one that I think of frequently is Rudyard Kipling’s Hymn of Breaking Strain. The inscription style was made to represent the metal stamps for writing the data on a nameplate, but I didn’t want to use all capital letters as is used in the industry.