Just remembered a really odd oxy story. My company had a contract for Convair T-29 (militarized CV-340)) IRANS.T-29 was a navigational trainer so there was a line of work stations down interior with bubble type astrodomes above. Each station had a crew type oxy setup.
I was assigned to tale down some interior wall liners below the window line. I observed a meta tube running fore and aft that supplied oxy to each station. It looked very odd. The line was supported by clamps. Between each clamp the line bulged outward. It resembled a row of sausage links tied off in sections.
Very neat looking, each section evenly sized. It rather resembled a line of link sausages. In fact so neat it looked right, like it was designed so.
Only being a techie, I called the Lead, he called supervision and then Engineering and the Air Force Inspector too. Couple of days later I was told it appeared there had been a low order explosion inside the tubing, almost certainly caused by a contaminated line. It had caused the metal to expand except where it was held by clamps.Hence the resemblance to sausage links. Great problems ensued as the line ran though the fuselage ring formers and had to be cut out in sections. Much more tearing out of wall panels to chase down further damage. Never heard if it was ever determined when it occurred. Must have been long time ago as there were no reports of odors from oxy system.