I'm just guessing that maybe you are referring to a male name Kaz, or Kazu, which is normally an abbreviated version (nickname) of longer names such as Kazuo, Kazuhiro, Kazuhiko, Kazutoshi, etc., etc., there are many male names that start with kazu-.
Definition of Quatrain. A quatrain is a verse with four lines, or even a full poem containing four lines, having an independent and separate theme. Often one line consists of alternating rhyme, existing in a variety of forms.
The word tuyau is used in French nowadays to designate the cables (fibre or other) that transport data. Maitres des tuyaux is a common enough ready made expression en French to designate those who master those means of communication (Google, Facebook ou Amazon, named in the quote). You are misreading the text you refer to.