Machinery Lube Oil Piping

[Krausen]

Curious the forum’s recommendations lube
oil piping design connecting to machinery (pumps, compressors, etc.)?

My understanding is the ideal is buttwelded stainless steel. I will be implementing this in an upcoming project for 3/4” & 1” lube oil piping. My RFWN flanges will have typical spiral-wound gaskets with inner rings.

Does the forum recommend buttwelding lube oil piping down to 1/2” size as well? Does the forum typically install spiral-wound gaskets with inner rings for buttwelded RFWN flanges as well?

 

[TugboatEng]

Modern systems of that diameter use bent tubing and flared or compression type fittings. It takes less labor, there is no need to pickle, QC is a simple go/no-go gauge (for Swagelok and clones), and it facilitates maintenance in the future.

 

[EdStainless]

I have seen it done with flare, double ferrule (Swagelok style), and press-fit systems (that get crimped).
SS is nice because it is clean.
Often these are done in sch10 pipe.
Even with SS you need to pay attention to external corrosion.
Don't let the bird crap collect on them.

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P.E. Metallurgy, consulting work welcomed