油气回收系统设计

　　Design of Oil and Gas Recovery System

　　1、设计单位：加油站油气回收系统工程设计由具有压力管道（GC2）和石油化工工程设计资质的单位承担。

　　1. Design unit: The engineering design of the gas station oil and gas recovery system is undertaken by a unit with qualifications in pressure pipeline (GC2) and petrochemical engineering design.

　　2、设计压力：加油站油品管道设计压力为0.6MPa；气体管道设计压力为0.13Mpa；机械呼吸阀工作压力范围：正压（2000－3000 Pa）负压（1500－2000 Pa）；汽油加油枪的气液比设定在1.05－1.1范围内；加油枪软管拉断阀，分离压力为400－600N。

　　2. Design pressure: The design pressure of the fuel pipeline at the gas station is 0.6MPa; The design pressure of the gas pipeline is 0.13Mpa; Working pressure range of mechanical breathing valve: positive pressure (2000-3000 Pa) and negative pressure (1500-2000 Pa); The gas-liquid ratio of the gasoline refueling gun is set within the range of 1.05-1.1; The fuel gun hose disconnect valve has a separation pressure of 400-600N.

　　3、管道规格：卸油汽油回收管道公称直径为DN80；卸油通气管道公称直径DN50；加油油气回收管道支管公称直径为DN40，主管道公称直径为DN100；油气处理装置的管道公称直径为DN50;加油检测接口公称直径为DN25；油气排放检测管道公称直径为DN25。

　　3. Pipeline specification: The nominal diameter of the oil unloading and gasoline recovery pipeline is DN80; The nominal diameter of the oil unloading ventilation pipeline is DN50; The nominal diameter of the refueling oil and gas recovery pipeline branch is DN40, and the nominal diameter of the main pipeline is DN100; The nominal diameter of the pipeline in the oil and gas processing unit is DN50; The nominal diameter of the refueling detection interface is DN25; The nominal diameter of the oil and gas emission detection pipeline is DN25.

　　4、管道敷设：油气回收系统的管道埋地部分均采用直埋，埋地深度为-500mm，管道周围回填200mm细沙，其余用素土回填夯实。管线采用大小头连接时，立管连接可采用同心大小头，水平管连接应采用管底取齐的偏心大小头。

　　4. Pipeline laying: The buried part of the oil and gas recovery system pipeline is directly buried, with a burial depth of -500mm. The pipeline is backfilled with 200mm fine sand around it, and the rest is backfilled and compacted with plain soil. When pipelines are connected by small and large heads, concentric small and large heads can be used for vertical pipe connections, and eccentric small and large heads that are aligned with the bottom of the pipe should be used for horizontal pipe connections.

　　5、管道坡度：油气回收系统管线均坡向油罐，加油油气回收管道坡度不小于1%，其余管道的坡度不小于2‰。

　　5. Pipeline slope: The oil and gas recovery system pipelines all slope towards the oil tank. The slope of the refueling oil and gas recovery pipeline is not less than 1%, and the slope of the remaining pipelines is not less than 2 ‰.

　　6、通气管、排气管：油罐通气管、油气处理装置排气管安装高度均为4米，与站内围墙的最小距离为2米；沿建筑物（如站房、罩棚）的墙（柱）向上敷设的通气管管口，应高出建筑物的顶面1.5米，汽油油罐通气管上端须安装机械呼吸阀。

　　6. Ventilation pipe and exhaust pipe: The installation height of the oil tank ventilation pipe and the oil and gas treatment device exhaust pipe is 4 meters, and the minimum distance from the station wall is 2 meters; The ventilation pipe opening laid upward along the walls (columns) of buildings (such as station buildings and canopies) should be 1.5 meters above the top of the building, and a mechanical breathing valve must be installed at the upper end of the gasoline tank ventilation pipe.

　　7、通气管阀门：安装在地上的油罐通气管上的阀门，安装高度为1.3米，安装在地下的油罐通气管上的阀门应避开跑道，并放置阀门井。油罐处理装置排气管的上端安装阻火通气罩。

　　7. Ventilation pipe valve: A valve installed on the ventilation pipe of an oil tank on the ground, with an installation height of 1.3 meters. The valve installed on the ventilation pipe of an oil tank underground should avoid the runway and be placed in a valve well. Install a flame retardant ventilation hood at the upper end of the exhaust pipe of the oil tank treatment device.

　　8、检测孔：油气排放处理装置的排气管上须安装检测孔，检测孔公称直径为DN25mm，安装高度距地面1.30米。加油系统须安装液阻检测或密闭性检测接口，检测孔直径为DN25mm，安装在加油机底盆（油气回收立管上）。

　　8. Detection hole: A detection hole must be installed on the exhaust pipe of the oil and gas emission treatment device, with a nominal diameter of DN25mm and an installation height of 1.30 meters above the ground. The refueling system must be equipped with a liquid resistance detection or airtightness detection interface, with a detection hole diameter of DN25mm, installed on the bottom basin of the refueling machine (oil and gas recovery riser).

　　9、连通软管选取：卸油连通软管、油气回收连通软管，应采用电阻率不大于108Ω/m的耐油软管。

　　9. Selection of connecting hoses: Oil unloading connecting hoses and oil and gas recovery connecting hoses should use oil resistant hoses with a resistivity not exceeding 108 Ω/m.

　　系统检测：

　　System detection:

　　系统安装完成后（或投入前）应进行下列检测：

　　After the system installation is completed (or before deployment), the following tests should be conducted:

　　1）依据GB20952—2007附录A，对汽油加油机至埋地油罐的地下油气回收管道进行液阻检测。

　　1) According to Appendix A of GB20952-2007, perform liquid resistance testing on the underground oil and gas recovery pipeline from gasoline dispensers to buried oil tanks.

　　2）依据GB20952—2007附录B，对油气回收系统进行密闭性检测。

　　2) According to Appendix B of GB20952-2007, perform a leak test on the oil and gas recovery system.

　　3）依据GB20952—2007附录C，对带油气回收功能的加油枪进行气液比检测。

　　3) According to Appendix C of GB20952-2007, perform gas-liquid ratio testing on refueling guns with oil and gas recovery function.

　　材质单、合格证

　　Material list, certificate of conformity

　　油气回收系统工程所使用的设备、材料必须有合格证和材质单，由施工单位整理保存，项目验收前一并交予建设单位。

　　The equipment and materials used in the oil and gas recovery system engineering must have a certificate of conformity and a material list, which shall be sorted and stored by the construction unit and submitted to the construction unit before project acceptance.

　　油气回收系统施工

　　Construction of oil and gas recovery system

　　一般要求：加油站油气回收系统工程施工与安装由具有压力管道（GC2）施工资质的单位承担。焊接压力管道的焊工，应按《锅炉压力容器压力管道焊工考试与管理规则》进行考试，取得焊工合格证。加油站油气回收系统施工按设计文件及工艺设备电气仪表的产品使用说明书进行，如需修改设计或材料代用，应有原设计单位变更设计的书面文件或经原设计单位同意的设计变更书面文件。施工前建设单位、设计单位对施工单位进行设计和技术交底，以及安全施工教育。施工单位编制施工方案，施工方案包括以下内容：

　　General requirement: The construction and installation of gas station oil and gas recovery system engineering shall be undertaken by units with pressure pipeline (GC2) construction qualifications. Welders who weld pressure pipelines should undergo an examination in accordance with the "Boiler Pressure Vessel Pressure Pipeline Welder Examination and Management Rules" and obtain a welder qualification certificate. The construction of the gas recovery system at gas stations shall be carried out in accordance with the design documents and the product manual for process equipment and electrical instruments. If design modifications or material substitutions are required, a written document of the original design unit's design change or a written document of the design change approved by the original design unit shall be provided. Before construction, the construction unit and design unit shall conduct design and technical disclosure to the construction unit, as well as safety construction education. The construction unit shall prepare a construction plan, which includes the following contents:

　　1）工程概况

　　1) Project Overview

　　2）施工部署

　　2) Construction deployment

　　3）施工进度计划

　　3) Construction schedule plan

　　4）主要的施工方法和质量标准

　　4) Main construction methods and quality standards

　　5）质量保证措施和安全保证措施；

　　5) Quality assurance measures and safety assurance measures;

　　6）施工记录

　　6) Construction records

　　施工用机械设备应该安全可靠，计量器具在有效检定期内，加油站油气回收系统应做好施工记录，隐蔽工程施工部位应以照片形式存档。

　　Construction machinery and equipment should be safe and reliable, measuring instruments should be within their valid calibration period, gas station oil and gas recovery systems should keep construction records, and concealed construction sites should be archived in the form of photos.

　　油管、电线缆管沟及地面恢复

　　Oil pipe, wire cable trench and ground restoration

　　1）管线、电缆回填，一般为四层，第一层沙层，第二为素土层，第三层为垫层，第四层为面层。

　　1) Pipeline and cable backfilling generally consists of four layers: the first layer is sand layer, the second layer is plain soil layer, the third layer is cushion layer, and the fourth layer is surface layer.

　　2）沙层的厚度为200MM，采用一般为黄沙；素土层为细土、厚度根据实际工程量；垫层采用三七灰土或土石屑厚度为300MM；混凝土地面选用C25，厚度250MM，其余地面按原材料铺设。

　　2) The thickness of the sand layer is 200MM, usually made of yellow sand; The plain soil layer is fine soil, and the thickness depends on the actual engineering quantity; The cushion layer is made of 37% lime soil or soil debris with a thickness of 300MM; the concrete floor is made of C25 with a thickness of 250MM, and the rest of the floor is laid with raw materials.

　　3）回填时采用人工和机械分步，每步不大于200MM，混凝土采用震捣夯实。

　　3) During backfilling, manual and mechanical methods are used in stages, with each step not exceeding 200MM. The concrete is compacted by vibration.

　　拆挖油罐挡土墙，油罐罐井应减少作业量和破损量，管线敷设完成后，应该恢复完好。设备基础、罐井、阀门等按图施工，符合设计要求。

　　The excavation of oil tank retaining walls and oil tank wells should reduce the amount of work and damage. After the pipeline laying is completed, it should be restored to its original condition. The equipment foundation, tank well, valves, etc. shall be constructed according to the drawings and meet the design requirements.

　　管道工程

　　pipeline engineering

　　1、管道焊接

　　1. Pipeline welding

　　管道焊缝外观应成型良好，与母材圆滑过度，宽度以每侧盖过坡口2mm为宜，焊接接头表面质量应符合下列要求：

　　The appearance of pipeline welds should be well formed, smoothly transitioned with the base material, and the width should cover the groove on each side by 2mm. The surface quality of the welded joint should meet the following requirements:

　　1）不得有裂纹、未熔合、夹渣、飞溅存在。

　　1) There shall be no cracks, lack of fusion, slag inclusion, or splashing present.

　　2）管道焊缝咬肉深度不应大于0.5mm，连续咬肉长度不大于100mm，且焊缝两侧咬肉总长不应大于焊缝全长的10%。

　　2) The depth of undercut in pipeline welds should not exceed 0.5mm, the length of continuous undercut should not exceed 100mm, and the total length of undercut on both sides of the weld should not exceed 10% of the total length of the weld.

　　3）焊缝表面不得低于管道表面，焊缝余高不应大于2mm。

　　3) The surface of the weld seam shall not be lower than the surface of the pipeline, and the excess height of the weld seam shall not exceed 2mm.

　　2、管道防腐

　　2. Pipeline anti-corrosion

　　管道采用电动砂轮和手工除锈达到二级,地上管道均刷铁红底漆两遍,面漆两遍；埋地工艺管道的外表面采用BL-10胶带加强级防腐。

　　The pipeline adopts electric grinding wheel and manual rust removal to achieve level two. The above ground pipeline is coated with two coats of iron red primer and two coats of topcoat; The outer surface of the buried process pipeline is reinforced with BL-10 tape for anti-corrosion.

　　3、管道试压及气密性

　　3. Pipeline pressure testing and airtightness

　　管道安装完毕后，应进行试压及气密性，管道采用气压试验压力为0.5Mpa稳压30分钟不降压、不变形，在焊口周围涂抹发泡济，不泄露为合格

　　After the installation of the pipeline is completed, pressure testing and airtightness should be carried out. The pipeline should be subjected to a pressure test with a pressure of 0.5Mpa and stabilized for 30 minutes without pressure drop or deformation. Foam should be applied around the weld joint to ensure that there is no leakage, which is considered qualified

　　4、管道坡度

　　4. Pipeline slope

　　为确保管道坡度达到1%，不小于2‰，应每2米对管道进行一次检验，并做好记录。

　　To ensure that the slope of the pipeline reaches 1% and is not less than 2 ‰, the pipeline should be inspected every 2 meters and recorded.

　　5、管道的吹扫

　　5. Purging of pipelines

　　管道系统试压合格后，应用空气进行吹扫，并应符合下列规定：

　　After the pipeline system passes the pressure test, it should be blown with air and comply with the following regulations:

　　1）不参与冲洗或吹扫的设备应隔离。

　　1) Equipment that does not participate in flushing or blowing should be isolated.

　　2）吹扫压力不得超过设备和管道系统的设计压力，空气流速不得小于20m/s.

　　2) The blowing pressure shall not exceed the design pressure of the equipment and pipeline system, and the air flow rate shall not be less than 20m/s

　　3）空气吹风时，应在排出口设白色油漆靶检查，以5min内靶上无铁锈及其他杂物颗粒为合格。

　　3) When blowing air, a white paint target should be set up at the exhaust outlet for inspection. If there is no rust or other debris particles on the target within 5 minutes, it is considered qualified.

　　安全施工

　　Safe construction

　　1、施工单位现场负责人和加油站站长为施工现场第一安全责任人，共同对施工安全负责。

　　1. The on-site person in charge of the construction unit and the gas station manager are the first safety responsible persons on the construction site, jointly responsible for construction safety.

　　2、在临时用电、动火、破土作业前，办理相关作业票，根据作业票的要求落实防护措施。

　　2. Before temporary electricity, hot work, and groundbreaking operations, obtain relevant work permits and implement protective measures according to the requirements of the work permits.

　　3、用电人持证上岗，严无证人员实施用电作业。

　　3. Electricity users must work with certificates, and unlicensed personnel must strictly carry out electricity operations.

　　4、电气线路的敷设、设备设施的安装及日常检维修作业时，指定专人进行监护。

　　4. Designate a dedicated person to supervise the laying of electrical circuits, installation of equipment and facilities, and daily maintenance operations.

　　5、保障各种电气线路和设备设施的完整性、规范性和安全性，做到“一机一闸一保护”，并定期指定专人进行检查。

　　5. Ensure the integrity, standardization, and safety of various electrical circuits and equipment facilities, achieve "one machine, one switch, one protection", and regularly designate dedicated personnel for inspection.

　　6、严格控制大功率电器的使用，禁止大负荷长时间使用电器设备。

　　6. Strictly control the use of high-power electrical appliances and prohibit prolonged use of electrical equipment under high loads.

　　7、严格落实各项安全措施和防护器具的使用。

　　7. Strictly implement various safety measures and the use of protective equipment.

　　8、遇雷雨天气停止用电作业。

　　8. Stop using electricity during thunderstorms.

　　油气回收工程项目验收

　　Acceptance of oil and gas recovery engineering projects

　　油气回收工程项目的验收分为分步验收和整体验收，分步验收是指施工过程中每个环节的验收；整体验收是指油气回收系统全部安装完成后，对整个系统的验收。

　　The acceptance of oil and gas recovery engineering projects is divided into step-by-step acceptance and overall acceptance. Step by step acceptance refers to the acceptance of each link in the construction process; Overall acceptance refers to the acceptance of the entire oil and gas recovery system after its installation is completed.

　　1、分步验收

　　1. Step by step acceptance

　　分步验收主要由现场管理人员（加油站站长）、监理根据施工的进展，按施工的要求进行验收，并签字。如管道的试压、焊接、防腐，管沟回填、夯实，特别是隐蔽工程。

　　Step by step acceptance is mainly carried out by on-site management personnel (gas station masters) and supervisors according to the progress of construction, in accordance with the requirements of construction, and signed. Such as pressure testing, welding, anti-corrosion of pipelines, backfilling and compaction of pipe trenches, especially for concealed works.

　　2、整体验收

　　2. Overall acceptance

　　整体验收由市环保局组织市有关部门对加油站油气回收系统进行验收。

　　The overall acceptance is organized by the Municipal Environmental Protection Bureau and relevant departments of the city to inspect the oil and gas recovery system of the gas station.

　　在整体验收前公司油气回收项目领导小组组织有关人员对已安装完成的加油站进行系统测试，做初验收。

　　Before the overall acceptance, the company's oil and gas recovery project leadership team organized relevant personnel to conduct system testing on the installed gas stations and conduct initial acceptance.

　　在工程整体验收前，施工单位应提交整个工程的竣工资料（包括竣工图）。

　　Before the overall acceptance of the project, the construction unit shall submit the completion documents (including completion drawings) of the entire project.

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　　This article is a friendly contribution from the gas station's three times oil and gas recovery equipment For more related knowledge, please click http://www.kosman.com.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon. Gas station triple oil and gas recovery equipment