yes, however you rarely see EAN40 outside of scientific diving. If you are concerned, you can get a personal in-line filter and use that while filling your tanks that will make the air going in oxy compatible, but no need for O2 cleaning up to EAN40.
Due to chambers closing and a higher need for multiple O2 clean regulators, I have recently broken down and O2 cleaned all of my tanks/valves/first stages. I'll probably "o2 clean" the seconds meaning at least use O2 clean tools and lube the next time I rebuild them, but that won't be for several years.
Right. Right. My bad. I was being dense. You don't need tanks to be O2 Clean to use with (for example) banked Nitrox (40% or less). Obviously, regs don't have to be, either, in that case.
Sorry for my confusion.