Connect all parts with care to avoid stripping metal slivers from threaded areas. Install and torque all fittings and lines according to applicable technical instructions. Complete preventive maintenance as specified by MRCs. Also, you must take care to ensure that the proper cylinders are connected to systems being supplied from cylinders. Cylinders for compressed air are painted black.
Cylinders containing oil-pumped air have air have one green stripe.
Oil-pumped nitrogen can be very dangerous in certain situations. For example, nitrogen is commonly used to purge oxygen systems. Oxygen will not burn, but it supports and accelerates combustion and will cause oil to burn easily and with great intensity. Therefore, oil-pumped nitrogen must never be used to purge oxygen systems. When the small amount of oil remaining in the nitrogen comes in contact with the oxygen, an explosion may result.