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Should the outlet pipe of the safety valve for the circulating water return flow in the methanol water cooler lead upward or be directed toward the ground? Currently, it is discharged straight into the air, and I feel this is not in compliance with regulations. Does anyone aware of this? According to AI, the tube side of the methanol water cooler is filled with high-pressure methanol vapor (operating temperature: 88°C to 40°C, pressure: 3.9–4.2 MPa), while the shell side contains low-pressure circulating water. The tube bundle may crack due to corrosion, vibration, and other factors; in such cases, the high-pressure methanol vapor can instantly enter the low-pressure circulating water pipes, causing them to burst suddenly. Therefore, safety valves are installed in the circulating water return pipes. Upon inspection, it was found that the discharge pipe at the outlet of this safety valve points upward. Since methanol vapor is a Class B flammable gas, discharging it upward causes the methanol gas-liquid mixture to be sprayed directly into the air. Methanol vapor is heavier than air, so it sinks and accumulates, easily forming large-scale flammable vapor clouds that can trigger fires or explosions if exposed to an ignition source. It is recommended that the discharge pipe at the outlet of this safety valve be redirected downward to a safe discharge point near the ground level.