CGA G-4.11

This publication applies to conventional ringed and labyrinth compressors in any geometric configuration having a crosshead and distance piece. Most operating experience exists in compressors greater than 17 700 ft³/hr (500 Nm³/hr) at pressures up to 1230 psi (8.5 MPa) with oxygen purity of 90% or greater and with maximum 10 ppm water (volume basis). Additionally, experience suggests that at a discharge pressure less than 29 psi (0.2 MPa) the likelihood of ignition is low and the consequence of ignition slight since the trapped inventory is small and fire is difficult to sustain at low pressures. This working group believes the publication can be applied to 1450 psi (10 MPa) without further precaution.