These are used on medical devices to ensure secure leak-free
connections and as such require rigorous testing.
I looked up a dictionary, and the meaning was:
as being what is indicated or suggested (https://www.collinsdictionary.com/dictionary/english/as-such)
Then does it mean "These are used on (…) connections, and that's why these require rigorous testing"?
Best Answer
I'll try to rephrase it as I understand it:
"These items are used on medical devices. Their purpose is to ensure that no leaks occur. Being such critical items, they require rigorous testing."
"Such" here stands for "such critical, such important parts". The importance is described in the first part of the sentence.