Original Title: Concentrated Solution | Petrochemical Regulation Problem Encyclopedia (Collection Edition) Is Coming Large set of petrochemical problems Knowledge points of common problems 1. The Petrochemical Regulation is compiled according to the production scope, fire accident scenarios and management requirements of petrochemical enterprises. Therefore, Article 1.0.2 clearly stipulates that this standard is applicable to the fire protection design of petrochemical enterprises. During the revision of the 2008 edition, the scope of fine chemicals was considered to be included in this standard, but after investigation, it was found that there were many differences between fine chemicals and petrochemical enterprises, which could not be generalized. Therefore, the production scope and accident scenarios of fine chemicals are not considered in the revision of this standard. Fine chemical projects can not copy all the provisions, but can only refer to the implementation. 2. Legal compliance is the bottom line of engineering design 。 "Petrochemical Standard" is the minimum safety requirements based on the experience and lessons of petrochemical enterprises. The specific engineering design should be combined with the actual risk analysis of the project, according to the requirements of relevant national or industrial standards, take reasonable and feasible safety and fire prevention measures, rather than simply apply the provisions of "Petrochemical Standard". 3. Petrochemical Standard is a comprehensive fire protection standard covering all specialties, and the standard compilation group is also composed of experts from all specialties, so it is impossible to require individual experts to answer all professional questions. Therefore, I can only answer this professional question, please understand. 4. It is suggested to study the Emergency Management Department of Zhejiang Province. On August 13, 2019, the Zhejiang Provincial Emergency Management Department issued the Guiding Opinions on the Application of Standards in the Implementation of Document 76 (Zhejiang Emergency Dangerous Chemical [2019] 96). I think their guidance is objective and practical. The main arguments are as follows: 1. In accordance with the principle of "respecting objective reality", the examination and approval items should be treated differently. The purpose of Document No.76 is to strengthen the safety design management of hazardous chemicals construction projects, and its scope of application is the hazardous chemicals construction projects stipulated in Decree No.45 of the former State Administration of Safety Supervision and Administration (Hazardous chemicals construction projects refer to new construction, reconstruction and expansion of hazardous chemicals production and storage construction projects and chemical construction projects accompanied by hazardous chemicals production). For construction projects that have passed the examination of safety conditions before the issuance of the Reply, according to the principle of "respecting objective reality", the construction projects can be implemented according to the original approval. 2. In accordance with the principle of "selecting standards according to the characteristics of construction projects", standards shall be selected in accordance with the law and regulations. According to the characteristics of the construction project and the scope of application of the standards and specifications, the standards and specifications selected for the project are determined. The Code for Fire Protection Design of Buildings (GB50016, hereinafter referred to as the Code for Fire Protection Design of Buildings) should be selected as the main standard for construction projects with buildings as the main part, and the Fire Protection Standard of Petrochemical Enterprises (GB50160, hereinafter referred to as the Petrochemical Standard) should be selected for construction projects with process units as the main part. At the same time, it should also comply with the provisions of the current applicable national standards, and the most stringent safety provisions shall prevail. 3. In accordance with the principle of "clarity according to law", construction projects with explosive hazards shall be determined. The materials involved (raw materials,Medical Full Body Coverall, intermediate products, by-products and products) are explosives or have explosive hazards, or may explode when they are wet, heated, exposed to open fire, rubbed or impacted by vibration. Hazardous chemicals construction projects with explosive hazards (including the formation of explosive mixtures with air after the leakage of flammable gases and liquids) shall be carried out in accordance with the Reply of the State Administration of Safety Supervision and Administration on the Defini tion Standards for Hazardous Chemicals Construction Projects with Explosive Hazards (General Administration of Safety Supervision and Administration). The design and evaluation units shall analyze the explosiveness of the construction project to determine whether it has explosion risk. 4. In accordance with the principle of "complying with the scope of application of the provisions", Document No.76 shall be implemented in accordance with the law and regulations. For construction projects with explosion risk, when the fire separation distance of places with explosion risk is designed in accordance with the Petrochemical Standard, the fire separation distance between process units (including open workshops), tank farms, warehouses and other places specified in the Petrochemical Standard shall be designed in accordance with the Petrochemical Standard,Medical Disposable Coverall, and the fire separation between buildings not specified in the petrochemical Standard shall be designed in accordance; The fire separation distance between the above two shall be determined in accordance with the national standards and specifications with clear provisions. When the national standards and specifications have no clear provisions, the fire separation distance can be determined by quantitative risk analysis calculation according to relevant standards. In order to effectively prevent mass casualties, the fire separation distance of facilities that may cause serious casualties in case of fire shall be designed with reference to the important facilities of the whole plant in the Petrochemical Standard. If it is really difficult to implement some provisions of the Petrochemical Standard for the renovation and expansion projects of old plants that are conducive to improving the intrinsic safety level, it may be stated in accordance with Article 1.0.2 of the Petrochemical Standard that "when it is really difficult to implement some provisions of this Standard, after taking effective fire prevention measures, the requirements may be relaxed appropriately, but risk analysis and assessment shall be carried out." The design has been approved by the relevant competent authorities. Expand the full text General Drawing Problem Q: Does the cooling tower with mechanical ventilation in the fine chemical plant comply with the requirements of Table 5.3.3 in the Code for Design of General Layout and Transportation of Chemical Enterprises? A: First of all, we must understand why this is required. Secondly, according to the characteristics of the project, we should judge which one should be strictly implemented and which one should not be used, and which one is not satisfied but there are measures. Q: Is the distance between Class D and Class E plants in the fine chemical plant and the Class D and Class E plants in the non-similar enterprises outside the plant in accordance with the construction regulations or the requirement of 25 meters in the petrochemical regulations? A: The petrochemical regulation does not involve Class D and Class E, and only important facilities and non-fire hazard facilities are 25 meters in the petrochemical regulation. Q: How to consider the distance between the sewage collection tank (temporary storage tank) of Class A workshop and another Class A workshop? (Directly according to the distance of 30m between the workshop and the workshop card. What fire hazard category is considered for the sewage collection tank) A: Regardless of the category, refer to 4.2.8 B, but determine what the pool is. Q: The liquid chlorine warehouse includes a vaporizer, and the liquid chlorine storage tank building is written in the liquid chlorine use procedures. Is the liquid chlorine storage tank building based on the Class B device or the Class B warehouse and the surrounding card spacing? A: If we use the petrochemical gauge, which has both the warehouse function and the factory function, press the big one. Q: The fire hazard category of the heat transfer oil furnace room is Class C and it is also the open fire location of the plant. Is it considered as Class II facilities? Is the distance between the heat transfer oil furnace room and the boiler room, RTO, compressed air nitrogen, etc. as Class C plant? A: Whether it is classified as Class II important facilities shall be judged according to the terminology; if it is open fire, open fire shall be considered; it can be classified as Class C plant with others. Q: Can the special tank group outside the workshop be arranged in the unit according to Table 5.2 of the Petrochemical Regulations? However, when the tank is 1000 m ³, Full Body Disposable Coverall ,Medical Quickly Delivery Antivirus Coverall, the tank needs to be 6 meters away from the fire dike, and if it is 9 meters away from the workshop, there is only 3 meters of open space, which does not meet the fire passage. Should we ensure that the distance between the fire dike of the special tank group outside the workshop and the outer wall of the workshop at least meets the fire passage of more than 7 meters? A: 5.2 For plant tanks or groups of tanks, regardless of size, 5.2.1 shall not apply to non-plant tanks or groups of plant tanks. If it is a unit storage tank or a unit storage tank group, it can be arranged according to the specification. Q: In the old version of the petrochemical regulation, the 2.0.19 liquefied hydrocarbon terminology explanation specifically emphasizes that liquefied natural gas is not included. In this new regulation, liquefied natural gas is removed. Can it be understood as liquefied hydrocarbon in the term of liquefied natural gas? A: OK. At present, some coal chemical enterprises will produce LNG as a by-product, or chemical enterprises will use LNG. The distance between low-temperature LNG storage tanks in petrochemical enterprises or coal chemical enterprises and surrounding facilities shall be subject to this specification. Other specifications related to natural gas shall be implemented for professional LNG receiving station. Q: The petrochemical code only stipulates the fire hazard of combustible liquids, and the fire hazard of solids refers to the building code, so does the distance between the warehouse storing combustible solids and other facilities in the plant refer to the building code or the petrochemical code? A: As long as the project implements the petrochemical regulations, some petrochemical regulations are used, and some petrochemical regulations are not used, such as plant to warehouse, warehouse to warehouse and so on. Q: Petrochemical regulations require that overhead power lines are strictly prohibited from crossing production areas, so other areas can be crossed except production areas? A: Other areas are also recommended to be avoided as far as possible. If crossing, it is not allowed to cross the production area. Q: How to consider the arrangement of storage tanks for highly toxic dangerous goods? Can it be arranged in the same group with the flammable liquid storage tank? A: There are requirements in the Code for Design of Oil Depot and the Code for Design of Fire Dike in Storage Tank Area, but there is no requirement in the Petrochemical Code. Q: Can the combustible liquid pressure storage tank and the combustible liquid low pressure storage tank be arranged in the same group? A: Shall meet 6.2.5 Problems of process specialty Q: Article 5 of 6.4.4 of the Petrochemical Code: Loading and unloading arms or metal hoses shall be used for the loading and unloading of liquefied hydrocarbons, and safety venting measures shall be taken. How to achieve safe emptying? A: In general, the gas phase is vented back to the liquefied hydrocarbon storage tank. Q: Petrochemical Regulation 7.1.5: In actual production, is it feasible to set up sewage ditches in most Class A production workshops? Is there any clear requirement? A: Sewage drainage trench is set in the unit area outside the workshop, which is beneficial to the collection of primary rainwater. Trenches should not be set in the workshop. Q: Petrochemical Regulation 7.2.15: The pipeline from liquefied hydrocarbon and combustible liquid equipment with operating temperature equal to or higher than the natural point to the pump inlet shall be provided with a shut-off valve. Is this valve a general valve or an emergency cut-off valve? A: Not necessarily the slam-shut valve. If the distance between the valve and the pump is less than 15 m, the valve shall be remote controlled with manual function. Q: Petrochemical Regulation 7.2.18: Pipes for liquefied hydrocarbon, liquid chlorine and liquid ammonia shall not be connected by hoses. I would like to ask whether it is contradictory to use metal hoses when unloading. Many enterprises use liquid chlorine cylinders and use hoses when gasifying. It is not feasible according to the specifications. Is there any other feasible way? A: The connection between the tank car and the pump can be a metal hose. Hoses shall not be used to connect the tank to the pump. Q: The whole plant area uses petrochemical specifications, but there are only Class C workshops and Class B outdoor rectification devices in the whole plant area. Is it necessary to set up explosion-proof control rooms? Can it be set up in the workshop? A: Need. The petrochemical regulation stipulates that an explosion-proof control room should be set up. Q: Petrochemical Regulation 7.2.9: As for the issue that the equipment and pipelines shall be replaced with inert gas in the Petrochemical Regulation, only Class A and Class B media are required. Other toxic and harmful media are not mentioned. Can it be understood that replacement is not required? A: Class A and Class B media shall be replaced with inert gas to prevent explosion during hot work for maintenance. The toxic medium may also be displaced in other ways. Q: Class C and B liquids with a storage temperature higher than 100 ℃ shall be provided with a special purging tank. How to set the purging tank? Where is the purging tank? Can it be set in the same tank group? A: Scavenging tank is set underground (buried). Scavenging is generally laid underground. For cold areas, it can be laid on the pipe gallery (to prevent pipeline blockage). Q: Is the outdoor equipment area of the fine chemical project regarded as the unit area, and is the layout in accordance with the relevant requirements of Table 5.2.1? If the outdoor equipment area is regarded as the unit area, is the safety distance from the workshop considered? A: The outdoor equipment area can be regarded as the plant area and shall comply with the relevant requirements of Table 5.2.1. If there is a compressor in the workshop, there is a spacing requirement, and there is no other spacing requirement. Q: According to Article 21 of Appendix B of Code for Design of Electrical Installations in Explosive Atmospheres, for production devices with process equipment volume not greater than 95m ³, pressure not greater than 3.5MPa and flow not greater than 38L/s, which are the secondary release sources, according to the practical experience of production, the scope of explosion hazard areas is divided with the release source as the center. The area within a radius of 4.5m can be classified as Zone 2. How to judge the division of explosion hazard area for the heat transfer oil boiler and the heat transfer oil storage tank arranged in the workshop? A: The range of 4.5m around the equipment is divided into 2 zones. Q: Bursting disc shall be set in front of the safety valve of the equipment with higher concentration of ethylene oxide. The inlet pipe of bursting disc shall be provided with nitrogen seal, and the outlet pipe of safety valve shall be filled with nitrogen. How should the nitrogen seal and nitrogen filling be set here? Is the nitrogen always on or does it require a pressure interlock? A: The nitrogen is always in the normally open state, and the pipeline is provided with a flowmeter. Q: For the storage tanks of Class A, B and B liquids sealed with nitrogen or other gases, in addition to the emergency pressure relief equipment, must the outlet of the breather valve set above be connected to the main pipe of tail gas treatment (except for Class I and II toxic media that cannot be discharged into the air)? A: Breathing valves of Class A, B and B liquid storage tanks do not need to be connected to the main pipe of tail gas treatment. Q: For the storage tank of flammable liquid, it is required to set an automatic dehydrator. How to set the automatic dehydrator here? A: Refer to the following figure: Professional problems of water supply and drainage Q: How to distinguish between large, medium and small petrochemical enterprises? According to the provisions of No.76 of Safety Supervision, there are two key and one major enterprises to follow the petrochemical regulations, so when the petrochemical regulations are applied to fine chemical enterprises, how to distinguish between large, medium and small petrochemical enterprises? A: For the classification standard of petrochemical regulation, see the article description: large enterprises with crude oil processing capacity greater than 10,000kt/a, and medium enterprises with crude oil processing capacity greater than or equal to 5,000kt/a and less than 10,000kt/a. Q: How to calculate the fire water quantity in the unit area? Especially for some small devices, how to define the amount of fire water? A: The fire fighting water volume in the unit area of petrochemical enterprises shall be subject to Section 8.4 of the Petrochemical Standard, and the fire fighting water volume of small units can be determined by referring to the provisions in Section 8.4.3. Q: How to understand Article 8.4.8 of the Petrochemical Regulation? If remote large and medium-sized petrochemical enterprises (without natural water sources around) need to add 10000 cubic meters of fire pool? A: Article 8.4.8 stipulates that "when adjacent enterprises have interconnected fire pipe network, the corresponding effective water volume can be deducted". That is to say, if the enterprise is located in or around the chemical industry park with adjacent enterprises to rely on, the corresponding amount of water can be subtracted, not necessarily 10000 cubic meters of fire pool. Q: The process unit area and tank farm of large petrochemical enterprises shall be provided with independent stable high-pressure fire water supply system. Which specification shall be followed for the stable high-pressure fire water supply system? There is no design requirement for the stable high-pressure system in the fire regulation. Is the stable high-pressure system designed with a high-level fire water tank? A: The stable high-pressure fire water supply system of large petrochemical enterprises shall comply with the requirements of the Petrochemical Standard. Article 8.11.4 States that "the following single-storey warehouses shall be supplied by the stable high-pressure fire water supply system". This article explains that the stable high-pressure fire water supply system installed in petrochemical enterprises has reliable water quantity and water pressure guarantee, and can be directly used in buildings without installing high-level water tanks. Q: How to understand 8.7.6 of the Petrochemical Code? The storage capacity of the foam concentrate required by the code should be calculated and determined, and should not be less than 100 cubic meters. How to store the 100 cubic meters of foam concentrate and what are the requirements for the storage settings? A: Article 8.7.6 stipulates that "when there are supporting conditions in the area, the sum of the amount of foam concentrate stored in the enterprise and the amount of foam concentrate that can be supported shall not be less than 100m3". This foam concentrate can be stored in a suitable place according to the specific conditions of the project, for example, it can be stored separately at the on-site foam station and the fire station. Article 8.2.3 stipulates that "the fire station should be equipped with facilities for rapid filling of foam concentrate to the fire truck." That is, not only the foam concentrate storage tank,Medical Full Body Coverall, but also the foam concentrate delivery pump shall be provided. Q: The fire cooling of Class A B liquid pressure spherical tank with boiling point lower than 45 ℃ should be set according to the requirements of liquefied hydrocarbon full-pressure storage tank, so how to set the fire cooling of Class A B liquid pressure horizontal storage tank with boiling point lower than 45 ℃? A: This can be done in accordance with 8.10.12. Q: Class C and B liquids with a storage temperature higher than 100 ℃ shall be provided with a special purging tank. How to set the purging tank? Where is the purging tank? Can it be set in the same tank group? A: Scavenging tank is set underground (buried). Scavenging is generally laid underground. For cold areas, it can be laid on the pipe gallery (to prevent pipeline blockage). Q: Is a fixed or semi-fixed foam fire extinguishing system provided for the 2000 m3 low pressure storage tank? A: Tanks other than those in 8.7.2 and 8.7.3 may be semi-fixed in accordance with 8.7.4. 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