The location, construction, and equipment of outdoor storage tank shall meet the following requirements:1.Article 13 is applicable mutatis mutandis to the safety distance between the shell of the storage tank and abutted buildings.2.The distance between the shell of the storage tank used to contain liquid and the boundary of the factory site shall meet the requirements specified in Attachment Table 4, except for the following circumstances:(1)The firewall is constructed of non-flammable materials of 2 hours and more fire rate.(2)The fire is hard to spread.(3)A fireproof water curtain is provided.3.The reserved space in surroundings of the storage tank shall meet the following requirements:(1)When the storage tank contains Six Materials at a flash point below 21℃, the distance shall be greater than 1 m for capacities less than 2 kL, greater than 2 m for capacities of 2 kL to 4 kL, greater than 3 m for capacities greater than 4 kL to 10 kL, greater than 5 m for capacities greater than 10 kL to 40 kL, and greater than 10 m for capacities greater than 40 kL.(2)When the storage tank contains Six Materials at a flash point above 21℃ and below 70℃, the distance shall be greater than 1 m for capacities less than 10 kL, greater than 2 m for capacities greater than 10 kL to 20 kL, greater than 3 m for capacities greater than 20 kL to 50 kL, greater than 5 m for capacities greater than 50 kL to 200 kL, and greater than 10 m for capacities greater than 200 kL.(3)When the storage tank contains Six Materials at a flash point above 70℃, the distance shall be greater than 1 m for capacities less than 20 kL, greater than 2 m for capacities greater than 20 kL to 40 kL, greater than 3 m for capacities greater than 40 kL to 100 kL, and greater than 5 m for capacities greater than 100 kL.4.The distance between the shell of neighboring storage tanks shall meet the following requirements:(1)For storage tanks containing Six Materials at a flash point below 60℃:i.For floating roof tanks with a diameter less than 45 m, the distance shall be one-sixth the sum of the diameter of two neighboring storage tanks, and shall be above 90 cm. For floating roof tanks with a diameter more than 45 m, the distance shall be a quarter the sum of the diameter of two neighboring storage tanks.ii.For fixed roof tanks with a diameter less than 45 m, the distance shall be one-sixth the sum of the diameter of two neighboring storage tanks, and shall be above 90 cm. For fixed roof tanks with a diameter more than 45 m, the distance shall be a one-third the sum of the diameter of two neighboring storage tanks.(2)For storage tanks containing Six Materials at a flash point above 60℃:i.For floating roof tanks with a diameter less than 45 m, the distance shall be one-sixth the sum of the diameter of two neighboring storage tanks, and shall be above 90 cm. For floating roof tanks with a diameter more than 45 m, the distance shall be a quarter the sum of the diameter of two neighboring storage tanks.ii.For fixed roof tanks with a diameter less than 45 m, the distance shall be one-sixth the sum of the diameter of two neighboring storage tanks, and shall be above 90 cm. For fixed roof tanks with a diameter more than 45 m, the distance shall be a quarter the sum of the diameter of two neighboring storage tanks.(3)For storage tanks inside the dike containing Six Materials at a flash point above 93℃, the distance shall be greater than 90 cm.5.Storage tanks shall be secured on a solid foundation and slippery terrain such as bedrocks and faults shall be avoided.6.Subparagraph 4 of Paragraph 1 of Article 33 is applicable mutatis mutandis to the construction of tank. Besides, the tanks shall be able to withstand strong winds and seismic loads, and the pillars shall be constructed of concrete reinforced with steel bars or steel structures or any other material of equivalent fireproof rating.7.The storage tank shall be constructed in such a way that allows gas and vapor to be discharged from the top of in case of any abnormal rise of pressure inside the tank.8.The surface of the storage tank shall be corrosion-proof.9.The surface of the bottom plate of the storage tank shall be corrosion-proof if it is in direct contact with the ground.10.Pressurized tanks shall be provided with safety devices; non-pressurized tanks shall be equipped with ventilation pipes.11.The storage tank shall be equipped with a device that automatically displays its storage capacity.12.For storage tanks containing Class 4 public hazardous materials, Subparagraph 8 of Paragraph 1 of Article 13 is applicable to the inlets thereof.13.In addition to meeting the requirements set forth in Subparagraph 1 of Paragraph1 of Article 35, the pumping equipment shall meet the following requirements:(1)The reserved space in surroundings of the pumping equipment shall be greater than 3 m, unless a firewall of 2 hours and more fire rate has been set or the storage quantity of the Six Materials stored is less than 10 times the control quantity.(2)The distance between the shell of the storage tank and the pumping equipment shall not be less than one-third the width of the reserved space for the storage tank.14.The tank valve shall be made of cast steel or material of equivalent performance, and shall not show any leakage.15.The drainage pipe of the storage tank shall be located on its wall. However, connections between the drainage pipe and the storage tank can be located at the bottom of the tank if they are not at the risk of being damaged by earthquakes or land subsidence.16.Floating roof tanks with equipment installed on its walls or float top shall not cause damage to the float top or wall panel in case of earthquakes or other disasters unless such equipment is necessary for security purposes.17.Article 36 is applicable mutatis mutandis to pipe installations.18.The lightening arrestor shall comply with CNS 12872 or a grounding means of equivalent protection shall be provided unless the quantity of the Six Materials in the storage tank is less than 10 times the control quantity or the surrounding environment does not present any danger from lightning strikes19.The dike shall be provided to storage tanks that contain Six Materials in liquid status, except for carbon disulfide.20.With respect to storage tanks storing solid substances which in contact with water emit flammable gases of Class 3 public hazardous materials, the rain protection equipment established above the inlets shall be constructed of waterproof non-flammable materials.21.Storage tanks storing carbon disulfide shall be buried in a leakage-free reinforced concrete tank with a wall thickness of more than 20 cm, and shall be in a leakage-proof made from reinforcement concrete.Attachment Table 4.pdf