[Q&A] June 15, 2017

Main installation locations for safety valves: 1. Independent pressure systems (separated from other systems by isolation valves). The system refers to being entirely gas-phase, entirely liquid-phase, or in communication with gas. 2. Overpressure caused by reactor abnormalities. 3. Cases where there is no safety valve at the source of the pressurized material in the container. 4. Vessels and pipes whose design pressure is lower than the pressure at the source of that pressure. 5. Outlet pipes for positive displacement pumps and compressors. 6. Vessels where overpressure is generated due to the accumulation of non-condensable gases. 7. If a shut-off valve or control valve is installed on the outlet pipe of the heating furnace, a safety valve should be installed upstream of that valve. 8. Areas with overpressure caused by process accidents, automatic control failures, power supply failures, fire accidents, and utility system failures. 9. The area where the liquid undergoes thermal expansion due to the closed valves at both ends. 10. Steam outlet pipe of the condensing turbine. 11. In some cases, due to leakage in the pump outlet check valve, a safety valve is installed on the pump’s inlet pipe.

1. Independent pressure system (separated from other systems by a shut-off valve). The system refers to being entirely gas-phase, entirely liquid-phase, or in communication with gas. 2. Overpressure caused by reactor abnormalities. 3. Cases where there is no safety valve at the source of the pressurized material in the container. 4. Vessels and pipes whose design pressure is lower than the pressure at the source of that pressure. 5. Outlet pipes for positive displacement pumps and compressors. 6. Vessels where overpressure is generated due to the accumulation of non-condensable gases. 7. If a shut-off valve or control valve is installed on the outlet pipe of the heating furnace, a safety valve should be installed upstream of that valve. 8. Areas with overpressure caused by process accidents, automatic control failures, power supply failures, fire accidents, and utility system failures. 9. The area where the liquid undergoes thermal expansion due to the closed valves at both ends. 10. Steam outlet pipe of the condensing turbine. 11. In some cases, due to leakage in the pump outlet check valve, a safety valve is installed on the pump’s inlet pipe.

Boiler: It should be installed at the highest point of the boiler drum or header, or on the economizer. Pressure vessel: Installed in the gas phase space above the liquid level of the pressure vessel, or installed on a pipe connected to the gas phase space of the pressure vessel.

Safety valves are used in pressurized equipment such as boilers and pressure vessels as overpressure protection devices. 1. Independent pressure system (separated from other systems by a shut-off valve). The system refers to all-gas phase, all-liquid phase, or gas-connected. 2. In cases where there is no safety valve at the source of the pressurized material in the container. 3. Containers and pipelines whose design pressure is lower than the pressure at the source of pressure. 4. Outlet pipes for positive displacement pumps and compressors. 5. Vessels where overpressure is generated due to the accumulation of non-condensable gases. 6. If a shut-off valve or control valve is installed on the outlet pipeline of the heating furnace, a safety valve should be installed upstream of such valve. 7. Areas with overpressure caused by process accidents, automatic control failures, power supply failures, fire accidents, and utility system failures. 8. The area where the liquid undergoes thermal expansion due to the closed valves at both ends. 9. Steam outlet pipe of the condensing turbine. 10. In some cases, due to leakage in the pump outlet check valve, a safety valve is installed on the pump’s inlet pipeline

Safety valves are used in pressurized equipment such as boilers and pressure vessels as overpressure protection devices. 1. Independent pressure system (separated from other systems by a shut-off valve). The system refers to all-gas phase, all-liquid phase, or gas-connected. 2. In cases where there is no safety valve at the source of the pressurized material in the container. 3. Containers and pipelines whose design pressure is lower than the pressure at the source of pressure. 4. Outlet pipes for positive displacement pumps and compressors. 5. Vessels where overpressure is generated due to the accumulation of non-condensable gases. 6. If a shut-off valve or control valve is installed on the outlet pipeline of the heating furnace, a safety valve should be installed upstream of such valve. 7. Areas with overpressure caused by process accidents, automatic control failures, power supply failures, fire accidents, and utility system failures. 8. The area where the liquid undergoes thermal expansion due to the closed valves at both ends. 9. Steam outlet pipe of the condensing turbine. 10. In some cases, due to leakage in the pump outlet check valve, a safety valve is installed on the pump’s inlet pipeline

1. Installed on pressurized vessels. 2. Installed at the outlets of pressurized pipes and pumps. 3. Installed on equipment where excessive pressure can cause the system to stop operating, lead to equipment damage, and pose hazards.

This post was last edited by TUICE on 2017-6-15 16:12: Pressurized vessels, pressure pipelines, equipment prone to damage due to overpressure

Main installation locations for safety valves: 1. Independent pressure systems (separated from other systems by isolation valves). The system refers to being entirely gas-phase, entirely liquid-phase, or in communication with gas. 2. Overpressure caused by reactor abnormalities. 3. Cases where there is no safety valve at the source of the pressurized material in the container. 4. Vessels and pipes whose design pressure is lower than the pressure at the source of that pressure. 5. Outlet pipes for positive displacement pumps and compressors. 6. Vessels where overpressure is generated due to the accumulation of non-condensable gases. 7. If a shut-off valve or control valve is installed on the outlet pipe of the heating furnace, a safety valve should be installed upstream of that valve. 8. Areas with overpressure caused by process accidents, automatic control failures, power supply failures, fire accidents, and utility system failures. 9. The area where the liquid undergoes thermal expansion due to the closed valves at both ends. 10. Steam outlet pipe of the condensing turbine. 11. In some cases, due to leakage in the pump outlet check valve, a safety valve is installed on the pump’s inlet pipe.

Main installation locations for safety valves: 1. Independent pressure systems (separated from other systems by isolation valves). The system refers to being entirely gas-phase, entirely liquid-phase, or in communication with gas. 2. Overpressure caused by reactor abnormalities. 3. Cases where there is no safety valve at the source of the pressurized material in the container. 4. Vessels and pipes whose design pressure is lower than the pressure at the source of that pressure. 5. Outlet pipes for positive displacement pumps and compressors. 6. Vessels where overpressure is generated due to the accumulation of non-condensable gases. 7. If a shut-off valve or control valve is installed on the outlet pipe of the heating furnace, a safety valve should be installed upstream of that valve. 8. Areas with overpressure caused by process accidents, automatic control failures, power supply failures, fire accidents, and utility system failures. 9. The area where the liquid undergoes thermal expansion due to the closed valves at both ends. 10. Steam outlet pipe of the condensing turbine. 11. In some cases, due to leakage in the pump outlet check valve, a safety valve is installed on the pump’s inlet pipeline