What is the difference between a safety valve and a vent pipe?

The vent pipe generally leads directly from the storage tank to the atmosphere, while the safety valve releases fluid only when it reaches its set pressure

Given the current environmental regulations, if it is indeed meant for direct emission into the atmosphere, would you dare to turn on that vent pipe?

A safety valve is a safety accessory used to release pressure when equipment or pipelines are under excessive pressure; venting, on the other hand, refers to ordinary pressure release, and this valve should be connected to the exhaust pipe

A safety valve is a safety device designed to prevent accidents; it is a safety accessory that releases pressure when the equipment is under overpressure conditions, thereby ensuring the safe operation of the equipment. The main function of the vent pipe is to handle the medium inside the process equipment when it is shut down for maintenance

A safety valve is a safety accessory, and a vent pipe is a vent pipe. Safety valves are used to release pressure under abnormal conditions, while vent pipes are generally used to release pressure under normal conditions.

Safety valves are essential for pressure vessels or pressure pipelines; they activate to release pressure when it exceeds the set limit, thereby ensuring the safety of the vessels and pipelines. For storage tanks that operate at atmospheric pressure, safety valves are not required. Instead, a breather valve and an emergency pressure relief valve are needed. The breather valve is used to control the inflow and outflow of gas in the tank during loading and unloading or as a result of temperature changes. The emergency pressure relief valve serves to prevent the tank from rupturing when the temperature rises suddenly due to a fire in nearby tanks; it functions in a similar way to a safety valve. This seems to be a buffer tank for transportation; it has only one vent pipe pointing upward along with a flame arrester, and it is likely used for manual exhaust purposes, remaining open at all times.

The safety valve is a safety accessory, while the vent pipe is used for inspection, maintenance, and purging

Many chemical companies treat the activation of safety valves as an accident; figure it out on your own:P

Looking at the picture, the vent pipe has a flame arrester on top; this is likely for on-site venting. During maintenance or similar tasks, it’s not possible for gas to flow directly into the flare or another system, so an on-site vent is provided

A safety valve is a safety device that prevents overpressure. Vent pipes are used in environmentally friendlier situations such as nitrogen purging, steam cleaning, and ventilation for maintenance purposes