Vent pipe and flare?
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When can the venting of combustible gases be done using only a vent tower (although a flare is obviously better)? I checked the \"Code for Fire Protection Design of Oil and Gas Engineering Projects\" (GB/T50183), the \"Code for Design of Fuel Gas Systems and Flammable Gas Emission Systems in Petrochemical Enterprises\" (SH3009), as well as API521 – none of these standards provide clear guidelines on this matter. They only mention the determination of the vent volume and the calculation related to vent pipes and flares, but do not specify whether vent pipes or flares should be used
It is necessary to check the environmental protection regulations; without flame combustion, combustible gases can cause harm to the environment
The vent pipe is used only for emergency emissions; there are no emissions under normal conditions, and the amount of emission is small when it does occur
Whether to use a flare or not depends on environmental considerations; if the amount of gas released is small, the height of the vent stack is sufficient, and the concentration of the released substances at ground level meets environmental regulations, then a flare may not be necessary. The use of a flare is still intended to ensure that toxic and harmful gases are treated through combustion, so that the exhaust gases released meet environmental regulations.
It’s not illegal to emit methane at a discharge point, right? Natural gas systems have safety vent valves anyway.
Looking at the explanatory text for clause 5.5.11 of GB50160, it states that, in principle, combustible gases should not be vented on-site; instead, they should be sent to a flare system or similar facility. . . .