oxygen has no colour
In the hospital, oxygen is supplied to each patient room via an outlet in the wall. Oxygen is delivered from a central source through a pipeline in the facility. A flow meter attached to the wall outlet accesses the oxygen.
Pipeline free span is the section of pipeline that is suspended.
i would check out the Russian pipeline or the Alaskan pipeline.
Pipeline total
Hemoglobin
oxygen
red
They are oxygen poor. Blood turns red only when in contact with oxygen.
The flame color of barium burning in oxygen is green.
Copper burns with a green flame when ignited with oxygen.
Sulfur heated in oxygen produces a blue flame.