1.0.1 This code is formulated with a view to implementing the relevant national policies, unifying specifications, and living up to safety, applicability, state-of-the-art technologies, economy and rationality in the design of oil depots.
1.0.2 This code is applicable to the design of newly-built, extended and rebuilt oil depots.
This code is not applicable to the storage and transportation facilities of the following flammable and combustible liquids:
1 Storage and transportation facilities of flammable and combustible liquids within the plant area of petrochemical enterprises;
2 Oil product yard (depot) in oil-gas field;
3 Oil transmission yard affiliated to the oil transmission pipeline;
4 Underground water-sealed oil depot in rock cavern, underground oil depot in salt cavern and oil depot in natural cavern and manually excavated oil storage cavern;
5 Independent liquefied hydrocarbon storage depot (including normal temperature liquefied petroleum gas storage depot and low-temperature liquefied hydrocarbon storage depot);
6 Liquefied natural gas storage depot;
7 Oil reserve depot with total volume of tank greater than or equal to 1200000m3 and for crude oil only.
1.0.3 The design of oil depot shall not only meet the requirements stipulated in this code, but also comply with those in the current relevant ones of the nation.
2 Terms
2.0.1 Oil depot
The independent warehouse or facility receiving, dispatching or storing crude oil, refined oil and other flammable and combustible liquid chemicals.
2.0.2 Super oil depot
The oil depot storing crude oil as well as non-crude flammable and combustible liquids and with the calculate nominal volume of tank greater than or equal to 1200000m3.
2.0.3 Oil depot attached to an enterprise
The oil depot arranged within the non-petrochemical enterprise battery limit and serving for the production or operation of this enterprise.
2.0.4 Tank
The facility storing flammable and combustible liquids.
2.0.5 Fixed roof tank
The tank with the top periphery fixed to the top of tank shell.
2.0.6 External floating roof tank
The tank with roof floating on the liquid surface.
2.0.7 Internal floating roof tank
The tank with floating deck installed in the fixed roof tank.
2.0.8 Vertical tank
The general term for fixed roof tank, external floating roof tank and internal floating roof tank.
2.0.9 Above ground tank
The general term for the open-air vertical tank and horizontal tank above the ground.
2.0.10 Underground storage oil tank
The underground horizontal oil tank buried through directly covering soil or filling sand (fine soil); the highest liquid level in the tank is 0.2m lower than the lowest elevation of the ground within 4m around the tank.
2.0.11 Buried vertical oil tank
The vertical oil product storage tank independently arranged in the soil-buried tank room or protective body.
2.0.12 Buried horizontal oil tank
The horizontal oil tank arranged through direct soil covering or burying, including the underground storage oil tank.
2.0.13 Buried oil tank
The general term for buried vertical oil tank and buried horizontal oil tank.
2.0.14 Pan internal floating roof tank
Internal floating roof tank with the floating roof free of bulk, buoy or other floater and directly contact the liquid only with basin-shaped floating roof.
2.0.15 Open-top bulk-headed internal floating roofs
The internal floating roof with the periphery arranged as a circular open-top bulk and the middle part as a single-layer deck plate only.
2.0.16 Pressurized tank
The tank with design pressure greater than or equal to 0.1MPa (gauge pressure on tank top).
2.0.17 Low-pressure tank
The tank with design pressure greater than 6.0kPa and less than 0.1MPa (gauge pressure on tank top).
2.0.18 Single-deck floating roof
The floating roof arranged with a circular sealed cabin in the periphery and with the middle part as a single-layer deck plate only.
2.0.19 Double- deck floating roof
The floating roof composed of bulks only.
2.0.20 A group of tanks
The group of above ground tanks laid within the same dike.
2.0.21 Tank farm
The farm composed of one or more tank groups or buried tanks.
2.0.22 Dike
The structure avoiding the flowing of flammable and combustible liquids and the spreading of fire in case of tank leakage.
2.0.23 Dividing dike
The structure dividing a tank group within the dike into several areas so as to reduce the influence range of flammable and combustible liquid flow when little leakage accident occurs.
2.0.24 Nominal volume of tank
The calculated and rounded nominal volume of tank.
2.0.25 Calculate nominal volume of tank
The total tank volume obtained through multiplying the nominal volume of tank by a certain coefficient according to different fire risk of the stored oil product.
2.0.26 Operating room for tank
The site where the inlet and outlet valves of buried oil tank are operated frequently.
2.0.27 Flammable liquid
The liquid with flash point lower than 45℃.
2.0.28 Combustible liquid
The liquid with flash point higher than or equal to 45℃.
2.0.29 Liquefied hydrocarbon
Hydrocarbon liquid with vapor pressure greater than 0.1MPa at 15℃ and other similar liquids, including liquefied petroleum gas.
2.0.30 Boil-over liquid
Hydrous viscous oil product (like crude oil, heavy oil, residual oil etc.) which will generate boil-over phenomenon when burned due to its heat wave characteristic.
2.0.31 Process pipeline
The pipeline transmitting flammable liquid, combustible liquid, flammable gas and liquefied hydrocarbon.
2.0.32 Operating temperature
The temperature of flammable and combustible liquids during normal storage or transmission.
2.0.33 Railway for oil loading and unloading
The railway section used for the loading and unloading of flammable and combustible liquids.
2.0.34 Vapor recovery device
The device carrying out recovery treatment on the collected combustible gas through adsorption, condensation, membrane separation and incineration to reach the standard discharge concentration.
2.0.35 Open flame site
The fixed site with open flame or red hot surface indoors and outdoors (except the cooking appliance, induction cooker and etc. in civil building).
2.0.36 Sparking site
The chimney with spark or the outdoor fixed sites of grinding wheel, electric welding and gas welding (cutting).
2.0.37 External pipeline
The pipeline laid beyond the enclosing wall of the oil depot between the tank farm and flammable and combustible liquid loading area or between the tank farms of different areas in the same oil depot, or between two adjacent oil depots.
2.0.38 Toxic liquid
The liquids with the toxicity degree divided into extreme hazard (Grade I), high hazard (Grade II), moderate hazard (Grade III) and slight hazard (Grade IV) according to the requirements of the current national standard "Classification of Health Hazard Levels from Occupational Exposure to Toxic Substances" (GBZ 230).
