Nothing else is coated on my systems Brockwood, just the receiver
We just use 'cleaned for oxygen service' pipe fittings (Brass predominantly) and pipe, purge any brazed joints with NF grade nitrogen during brazing
All filter housings and regulators are striped and cleaned for medical air use (Divers grease)
There are some builders who use lined aluminum piping, but its not necessary under the NFPA codes we work to.
Our medical vacuum receivers are also epoxy coated
We just use 'cleaned for oxygen service' pipe fittings (Brass predominantly) and pipe, purge any brazed joints with NF grade nitrogen during brazing
All filter housings and regulators are striped and cleaned for medical air use (Divers grease)
There are some builders who use lined aluminum piping, but its not necessary under the NFPA codes we work to.
Our medical vacuum receivers are also epoxy coated