油氣回收系統(tǒng)設(shè)計(jì)

　　Design of Oil and Gas Recovery System

　　1、設(shè)計(jì)單位：加油站油氣回收系統(tǒng)工程設(shè)計(jì)由具有壓力管道（GC2）和石油化工工程設(shè)計(jì)資質(zhì)的單位承擔(dān)。

　　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、設(shè)計(jì)壓力：加油站油品管道設(shè)計(jì)壓力為0.6MPa；氣體管道設(shè)計(jì)壓力為0.13Mpa；機(jī)械呼吸閥工作壓力范圍：正壓（2000－3000 Pa）負(fù)壓（1500－2000 Pa）；汽油加油槍的氣液比設(shè)定在1.05－1.1范圍內(nèi)；加油槍軟管拉斷閥，分離壓力為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、管道規(guī)格：卸油汽油回收管道公稱直徑為DN80；卸油通氣管道公稱直徑DN50；加油油氣回收管道支管公稱直徑為DN40，主管道公稱直徑為DN100；油氣處理裝置的管道公稱直徑為DN50;加油檢測(cè)接口公稱直徑為DN25；油氣排放檢測(cè)管道公稱直徑為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、管道敷設(shè)：油氣回收系統(tǒng)的管道埋地部分均采用直埋，埋地深度為-500mm，管道周圍回填200mm細(xì)沙，其余用素土回填夯實(shí)。管線采用大小頭連接時(shí)，立管連接可采用同心大小頭，水平管連接應(yīng)采用管底取齊的偏心大小頭。

　　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：油氣回收系統(tǒng)管線均坡向油罐，加油油氣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、通氣管、排氣管：油罐通氣管、油氣處理裝置排氣管安裝高度均為4米，與站內(nèi)圍墻的最小距離為2米；沿建筑物（如站房、罩棚）的墻（柱）向上敷設(shè)的通氣管管口，應(yīng)高出建筑物的頂面1.5米，汽油油罐通氣管上端須安裝機(jī)械呼吸閥。

　　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、通氣管閥門：安裝在地上的油罐通氣管上的閥門，安裝高度為1.3米，安裝在地下的油罐通氣管上的閥門應(yīng)避開跑道，并放置閥門井。油罐處理裝置排氣管的上端安裝阻火通氣罩。

　　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、檢測(cè)孔：油氣排放處理裝置的排氣管上須安裝檢測(cè)孔，檢測(cè)孔公稱直徑為DN25mm，安裝高度距地面1.30米。加油系統(tǒng)須安裝液阻檢測(cè)或密閉性檢測(cè)接口，檢測(cè)孔直徑為DN25mm，安裝在加油機(jī)底盆（油氣回收立管上）。

　　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、連通軟管選取：卸油連通軟管、油氣回收連通軟管，應(yīng)采用電阻率不大于108Ω/m的耐油軟管。

　　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.

　　系統(tǒng)檢測(cè)：

　　System detection:

　　系統(tǒng)安裝完成后（或投入前）應(yīng)進(jìn)行下列檢測(cè)：

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

　　1）依據(jù)GB20952—2007附錄A，對(duì)汽油加油機(jī)至埋地油罐的地下油氣回收管道進(jìn)行液阻檢測(cè)。

　　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）依據(jù)GB20952—2007附錄B，對(duì)油氣回收系統(tǒng)進(jìn)行密閉性檢測(cè)。

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

　　3）依據(jù)GB20952—2007附錄C，對(duì)帶油氣回收功能的加油槍進(jìn)行氣液比檢測(cè)。

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

　　材質(zhì)單、合格證

　　Material list, certificate of conformity

　　油氣回收系統(tǒng)工程所使用的設(shè)備、材料必須有合格證和材質(zhì)單，由施工單位整理保存，項(xiàng)目驗(yàn)收前一并交予建設(shè)單位。

　　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.

　　油氣回收系統(tǒng)施工

　　Construction of oil and gas recovery system

　　一般要求：加油站油氣回收系統(tǒng)工程施工與安裝由具有壓力管道（GC2）施工資質(zhì)的單位承擔(dān)。焊接壓力管道的焊工，應(yīng)按《鍋爐壓力容器壓力管道焊工考試與管理規(guī)則》進(jìn)行考試，取得焊工合格證。加油站油氣回收系統(tǒng)施工按設(shè)計(jì)文件及工藝設(shè)備電氣儀表的產(chǎn)品使用說明書進(jìn)行，如需修改設(shè)計(jì)或材料代用，應(yīng)有原設(shè)計(jì)單位變更設(shè)計(jì)的書面文件或經(jīng)原設(shè)計(jì)單位同意的設(shè)計(jì)變更書面文件。施工前建設(shè)單位、設(shè)計(jì)單位對(duì)施工單位進(jìn)行設(shè)計(jì)和技術(shù)交底，以及安全施工教育。施工單位編制施工方案，施工方案包括以下內(nèi)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）工程概況

　　1) Project Overview

　　2）施工部署

　　2) Construction deployment

　　3）施工進(jìn)度計(jì)劃

　　3) Construction schedule plan

　　4）主要的施工方法和質(zhì)量標(biāo)準(zhǔn)

　　4) Main construction methods and quality standards

　　5）質(zhì)量保證措施和安全保證措施；

　　5) Quality assurance measures and safety assurance measures;

　　6）施工記錄

　　6) Construction records

　　施工用機(jī)械設(shè)備應(yīng)該安全可靠，計(jì)量器具在有效檢定期內(nèi)，加油站油氣回收系統(tǒng)應(yīng)做好施工記錄，隱蔽工程施工部位應(yīng)以照片形式存檔。

　　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、電線纜管溝及地面恢復(fù)

　　Oil pipe, wire cable trench and ground restoration

　　1）管線、電纜回填，一般為四層，第一層沙層，第二為素土層，第三層為墊層，第四層為面層。

　　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）沙層的厚度為200MM，采用一般為黃沙；素土層為細(xì)土、厚度根據(jù)實(shí)際工程量；墊層采用三七灰土或土石屑厚度為300MM；混凝土地面選用C25，厚度250MM，其余地面按原材料鋪設(shè)。

　　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）回填時(shí)采用人工和機(jī)械分步，每步不大于200MM，混凝土采用震搗夯實(shí)。

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

　　拆挖油罐擋土墻，油罐罐井應(yīng)減少作業(yè)量和破損量，管線敷設(shè)完成后，應(yīng)該恢復(fù)完好。設(shè)備基礎(chǔ)、罐井、閥門等按圖施工，符合設(shè)計(jì)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

　　管道焊縫外觀應(yīng)成型良好，與母材圓滑過度，寬度以每側(cè)蓋過坡口2mm為宜，焊接接頭表面質(zhì)量應(yīng)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）不得有裂紋、未熔合、夾渣、飛濺存在。

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

　　2）管道焊縫咬肉深度不應(yīng)大于0.5mm，連續(xù)咬肉長(zhǎng)度不大于100mm，且焊縫兩側(cè)咬肉總長(zhǎng)不應(yīng)大于焊縫全長(zhǎng)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）焊縫表面不得低于管道表面，焊縫余高不應(yīng)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

　　管道采用電動(dòng)砂輪和手工除銹達(dá)到二級(jí),地上管道均刷鐵紅底漆兩遍,面漆兩遍；埋地工藝管道的外表面采用BL-10膠帶加強(qiáng)級(jí)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、管道試壓及氣密性

　　3. Pipeline pressure testing and airtightness

　　管道安裝完畢后，應(yīng)進(jìn)行試壓及氣密性，管道采用氣壓試驗(yàn)壓力為0.5Mpa穩(wěn)壓30分鐘不降壓、不變形，在焊口周圍涂抹發(fā)泡濟(jì)，不泄露為合格

　　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

　　為確保管道坡度達(dá)到1%，不小于2‰，應(yīng)每2米對(duì)管道進(jìn)行一次檢驗(yàn)，并做好記錄。

　　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、管道的吹掃

　　5. Purging of pipelines

　　管道系統(tǒng)試壓合格后，應(yīng)用空氣進(jìn)行吹掃，并應(yīng)符合下列規(guī)定：

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

　　1）不參與沖洗或吹掃的設(shè)備應(yīng)隔離。

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

　　2）吹掃壓力不得超過設(shè)備和管道系統(tǒng)的設(shè)計(jì)壓力，空氣流速不得小于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）空氣吹風(fēng)時(shí)，應(yīng)在排出口設(shè)白色油漆靶檢查，以5min內(nèi)靶上無鐵銹及其他雜物顆粒為合格。

　　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、施工單位現(xiàn)場(chǎng)負(fù)責(zé)人和加油站站長(zhǎng)為施工現(xiàn)場(chǎng)第一安全責(zé)任人，共同對(duì)施工安全負(fù)責(zé)。

　　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、在臨時(shí)用電、動(dòng)火、破土作業(yè)前，辦理相關(guān)作業(yè)票，根據(jù)作業(yè)票的要求落實(shí)防護(hù)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、用電人持證上崗，嚴(yán)無證人員實(shí)施用電作業(yè)。

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

　　4、電氣線路的敷設(shè)、設(shè)備設(shè)施的安裝及日常檢維修作業(yè)時(shí)，指定專人進(jìn)行監(jiān)護(hù)。

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

　　5、保障各種電氣線路和設(shè)備設(shè)施的完整性、規(guī)范性和安全性，做到“一機(jī)一閘一保護(hù)”，并定期指定專人進(jìn)行檢查。

　　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、嚴(yán)格控制大功率電器的使用，禁止大負(fù)荷長(zhǎng)時(shí)間使用電器設(shè)備。

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

　　7、嚴(yán)格落實(shí)各項(xiàng)安全措施和防護(hù)器具的使用。

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

　　8、遇雷雨天氣停止用電作業(yè)。

　　8. Stop using electricity during thunderstorms.

　　油氣回收工程項(xiàng)目驗(yàn)收

　　Acceptance of oil and gas recovery engineering projects

　　油氣回收工程項(xiàng)目的驗(yàn)收分為分步驗(yàn)收和整體驗(yàn)收，分步驗(yàn)收是指施工過程中每個(gè)環(huán)節(jié)的驗(yàn)收；整體驗(yàn)收是指油氣回收系統(tǒng)全部安裝完成后，對(duì)整個(gè)系統(tǒng)的驗(yàn)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、分步驗(yàn)收

　　1. Step by step acceptance

　　分步驗(yàn)收主要由現(xiàn)場(chǎng)管理人員（加油站站長(zhǎng)）、監(jiān)理根據(jù)施工的進(jìn)展，按施工的要求進(jìn)行驗(yàn)收，并簽字。如管道的試壓、焊接、防腐，管溝回填、夯實(shí)，特別是隱蔽工程。

　　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、整體驗(yàn)收

　　2. Overall acceptance

　　整體驗(yàn)收由市環(huán)保局組織市有關(guān)部門對(duì)加油站油氣回收系統(tǒng)進(jìn)行驗(yàn)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.

　　在整體驗(yàn)收前公司油氣回收項(xiàng)目領(lǐng)導(dǎo)小組組織有關(guān)人員對(duì)已安裝完成的加油站進(jìn)行系統(tǒng)測(cè)試，做初驗(yàn)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.

　　在工程整體驗(yàn)收前，施工單位應(yīng)提交整個(gè)工程的竣工資料（包括竣工圖）。

　　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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