design capability of the linear combustion apparatus 10 during a selected time period such as the thirty second timer count thus the pressure indicating assembly 82 provides for instant relief of the system at peak pressures that occur before the flow switches can react to open the signal actuated valves of course other pressure relief devices of conventional construction may be provided should the maximum discharge rate of a particular unit be insufficient to adequately address potential pressure peaks as depicted in fig2 the stage burner assemblies 30 32 34 36 and 38 are each represented by one t shaped burner this is for drawing simplification as the plan view of fig3 will disclose for clarity the burner nozzles are not shown in this figure so that the flare gas conduits will be clearly visible as shown the first stage burner assembly 30 comprises a pair of t shaped burners each conforming to the description which will be provided hereinbelow the second stage burner assembly 32 comprises six burners the third stage burner assembly 34 comprises twelve burners the fourth stage burner assembly 36 comprises twenty one burners and the fifth stage burner assembly 38 comprises twenty five burners as will be understood the number of stages as well as the number of burners in each stage will be a matter of design choice as these numbers will be determined.