苯乙烯储存、储罐最低要求

29.3.06. (JH) Final Draft最终版本Minimum control最低要求

Temperature indicator and high temperature alarm fitted on storage tank and setat 30 degrees C 储罐装温度计量仪,高温报警器(设定在30度)

Pure nitrogen blanketing is not acceptable 纯净的氮封是不可接受的Circulation capability循环能力Maximum storage temperature for Styrene Monomer is 25 degrees C 苯乙烯的最大储存温度为25摄氏度Proposed Minimum and Recommended Controls for Shell managed or contracmanufacturing sites). This documents should be used in conjunction with the relevant HSSE checklist 本清单适用于公司管理或租用的苯乙烯储罐( 不包括客户和生产现场的储罐).本清单应该和有关检查表一并使用.

Assuming minimum circulation capability - appropriate oxygen (minimum oxygenconcentration in vapour gap, 6-8 %) and inhibitor levels (min 10 ppm pTBC) mustbe maintained during storage 假定最小的循环能力-适当的氧气含量(气相中氧气含量最小为6-8 %) 和抑聚剂水平(最小 10 ppm Ptbc) 必须在储存期间有效保留NOTES : The Technical Expert and the HSSE Advisor must use their expert judadditional guidance - the assessors must consult with other Shell Technical or HSSE Experts prior to making a final assessment of the facility (see attached list). 说明: 技术专家和HSSE 顾问必须应用他们的专用判定以确定是否符合最低的控制要求. 如需要额外的指导, 评估人可和壳牌公司技术和HSSE 专家进行咨询,以完成最终的评估

Tank linings - stainless steel or lined carbon steel (inorganic zinc silicate, bakedphenolic and modified epoxy coatings). 储罐内衬 - 不锈钢或加喷涂的碳素钢(无机锌硅酸盐, 烘培石碳酸和改良环氧涂料)Pumps and lines - stainless steel, galvanised steel or carbon steel 泵和管线-不锈钢,镀锌钢和碳素钢Effective cleaning procedures 有效的清洗程序

J Heath 2022/2/22Tanks must be designed according to recognised international standards e.g.API 650, API 2000, BS 2654. 储罐应按国际标准设计,如 API 650, BS 2654Critical Parameter/Method 关键参数/方法Inhibitor analysis 抑聚剂含量ASTM D4590-92Polymer analysis 聚合物分析ASTM D2121-90Colour 颜色ASTM D1209-93Water水分ASTM D1364-90Styrene Monomer temperature 苯乙烯温度Recommended controls 建议的控制措施Assuming adequate circulation capability - recommended storage duration of 30days maximum for temperatures up to 30 degrees centigrade. After whichproduct will go off spec. and chilling is recommended 假定有足够的循环能力- 推荐储存最大期限为30天,温度30度. 在此后产品将超标,建议冷冻处理Flame Arrestors on PVV Outlets are not recommended. If an open vent is used,then a flame arrestor is required for fire safety reasons. Quarterly inspectionrecommended. 泄压阀出口安装阻火器是不推荐的.如采用了开式通气口, 那么需要安装阻火器以起到防火的作用. 建议每季度进行检查 Dedicated lines are recommended. 建议采用专用管线Sloped lines, no low points (avoid stagnancy), smooth surfaces (coating, nozzlesbelow liquid level) are recommended. 建议采用倾斜的管线, 没有低点(防止产品停滞),光滑的表面(涂料, 在液面下的管口)Sufficient venting capacity to avoid over-pressurisation 足够的排放能力,以避免过压Quarterly inspection to ensure no polymer build-up in hoses, tanks, valves, lines,vents etc. is recommended 每季度检查是否在管线,储罐,阀门,软管,排气口等有聚合物生成Provision to apply internal foam injection to storage tank is recommended建议安装向罐内加注泡沫的设施Avoid potential sources of contamination 避免可能的污染源Contingency planning in the event of a polymerisation event 对由于聚合可能造成的事故制定应急计划Additional reference materialProduct Safety Data Sheets (http://www.shellchemicals.com)Quarterly inspection of PVV is recommended 每季度检查泄压阀NOTES : Recommended Controls represent additional good practice measures说明: 建议的控制措施表示为推荐的良好做法,应该考虑采纳, 并在评估时讨论concentration in vapour gap, 6-8 %) and inhibitor levels (min 10 ppm pTBC) mustbe maintained during storage 假定最小的循环能力-适当的氧气含量(气相中氧气含量最小为6-8 %) 和抑聚剂水平(最小 10 ppm Ptbc) 必须在储存期间有效保留

Facility to test for critical parameters 测试关键参数的设施

In the event of a significant change to one of the above - the frequency of mea如上述任何一个发生明显变化, 测试频率应提高,并测试额外参数Assuming the above Minimum Requirements are met, the critical paramet假定上述最低条件得到满足,关键数据和测量的频率如下

J Heath 2022/2/22Shell Canada Styrene Storage and Handling guideCEFIC Styrene Distribution Guidelineshttp://www.cefic.org/sector/styrene/guide9801/00.htmCEFIC Styrene Environment, Health and Safety Guidelines -http://www.styrenemonomer.org/Global Product Stewardship System https://sww-knowledge.shell.com/knowhow/livelink.exe/fetch/2000/1476603/5462918/14988587/14992228/28633521/index.htm?nodeid=20635803&vernum=0Who are the Shell experts/focal points who can be contacted for advice?Styrene storage and handling :Site contacts :Styrene reaction kinetics :Styrene Product Stewardship and HSE advice :

J Heath 2022/2/22Guidance notes for assessorOn demand - ideally minimum circulation to achieve homogeneity in one day. In general, circulation of threevolumes will achieve homogeneity, however, it is recognised that this may take up to 3-4 days按要求－理想的在一天内能达到最小的均匀一致的要求。一般来说，循环3个体积量能达到均衡性，但是，这可能需要3－4天Check suitable location for sampling in that circulation loop 检查循环回路的取样点After discharge of new product into tank - circulation should be initiated for 24 hours 新产品进罐后，应在24小时内完成循环Mixing achieves uniform temperature and composition (polymer, oxygen and inhibitor). Therefore, inlet, outlet andrecirculation connections are ideally located near the bottom of the tank and can be reversed so that the product ispumped from the bottom and discharged through the swing pipe below the liquid surface.混合达到均衡的温度和组成（聚合物，氧气和阻聚剂）为此，进料、出料和再循环管线最理想的是位于储罐的底部，并可倒转，以便产品从底部泵出，从液面下的回转管排出。Adequate technical measures to control product temperature in storage tanks must be provided in locations wheretemperatures routinely exceed 25 degrees C. Adequate technical measures may include cooling/chilling systems,insulation, white reflective exterior coating, sun shelters etc..在温度通常超过25度的地方,必须提供足够的技术措施以控制储罐温度.足够的技术措施包括冷却和制冷系统,绝缘,白色的反光外漆,阳光遮盖Firewater sprinklers provide water at ambient temperature, and are ineffective for keeping temperature belowambient. 消防水喷淋提供水为环境温度,不能有效的保持在环境温度以下Temperature alarm should form part of routine tank design, but should be checked.温度报警应成为储罐常规设计的一部分,并需检测Compatibility with other materials needs to be thoroughly assessed. 需彻底评估和其它材料的兼容性Rubber-based linings and polyamide-cured epoxies should not be used. Aluminimum is satisfactory but will notwithstand a fire. 不得使用橡胶内垫和聚酰胺硫化环氧涂料. 铝材可以满足但不能承受火灾Copper alloys (e.g. copper, bronze) should not be used in contact with styrene in the liquid phase, since they willdiscolour Styrene Monomer. However copper is sometimes used in vapour lines to reduce polymer build up, sinceit inhibits styrene polymerisation. In such a case extra caution should be taken to prevent any galvanic corrosion atthe interface between different materials and to avoid that any liquid Styrene Monomer comes into contact withcopper. 铜合金(如铜, 青铜)不得与苯乙烯在液相中接触,因为会使苯乙烯变色.但是, 有时后在气相中使用铜制品以减少聚合物的生成, 应为会抑止聚合物的生成. 在此情况下, 应特别小心, 避免在不同金属界面的电化学腐蚀,并避免和苯乙烯液体接触Compatibility with other materials needs to be thoroughly assessed. 需评估是否和其它材料兼容Rubber-based linings and polyamide-cured epoxies should not be used. Aluminimum is satisfactory but will notwithstand a fire. 不得使用橡胶内垫和聚酰胺硫化环氧涂料. 铝材可以满足但不能承受火灾Check whether lines are insulated for temperature controlCopper alloys (e.g. copper, bronze) should not be used in contact with styrene in the liquid phase, since they willdiscolour Styrene Monomer. However copper is sometimes used in vapour lines to reduce polymer build up, sinceit inhibits styrene polymerisation. In such a case extra caution should be taken to prevent any galvanic corrosion atthe interface between different materials and to avoid that any liquid Styrene Monomer comes into contact withcopper.铜合金(如铜, 青铜)不得与苯乙烯在液相中接触,因为会使苯乙烯变色.但是, 有时后在气相中使用铜制品以减少聚合物的生成, 应为会抑止聚合物的生成. 在此情况下, 应特别小心, 避免在不同金属界面的电化学腐蚀,并避免和苯乙烯液体接触Effective cleaning procedures (e.g. line pigging, solvent cleaning, N2 blow/drain loading/discharge lines emptyafter use) should be documented and implemented to avoid any product contamination with incompatible products有效的清洗程序 (对装车和卸货 管线在使用后采取推球,溶剂清洗,N2吹扫) 需形成文件化,并进行实施,以避免产品和其它不兼容产品的污染Highlight concern for potential for oxygen starvation due to frequent N2 blowing, and potential for tankoverpressure if blowing quantity exceeds tank breathing capacity. 强调由于经常的N2吹扫,会造成潜在的缺氧,如吹扫的数量超过储罐的呼吸量,会造成罐体过压>6% oxygen concentration is required for effective inhibition. <8% oxygen concentration is required to preventformation of a flammable mixture. The preferred method for achieving this concentartion is through a nitrogen mixwith dry air. The inhibitor concentration should be kept in the 10-15 ppm range for effective protection. If theinhibitor concentration goes below 10 ppm, additional inhibitor must be added as a solution to restore the level toca. 15 ppm. 为有效的抑聚效果, >6% 是必须的. <8% 氧气含量是为了防止形成可燃混合气体. 首选达到该含量是通过氮气和干空气进行混合. 抑聚剂的含量应保留在10-15 ppm ,以实现有效的保护.如抑聚剂浓度低于10 ppm, 应添加额外的抑聚剂以达到15 ppm 浓度Note that some requirements for higher pTBC levels may be standard in some countries due to customerrequirements (e.g. 20-30ppm in Thailand) 必须注意一些国家的客户可能需要高一些的 p-tbc 浓度 (如泰国为20- 30ppm)Check suitable location for sampling in circulation loop 检查循环回路中的取样点Sufficient stock of inhibitor should be available on site, with a documented procedure for addition to product in thetank 现场应该有足够的抑聚剂的存量, 并有向储罐添加的文件化的程序ntracted Styrene Monomer Storage Tanks (this excludes customer tanks and tanks on our ownn conjunction with the relevant HSSE checklist 本清单适用于公司管理或租用的苯乙烯储罐( 不包括客户和生产现场的储罐).本清单应rt judgement to assess whether these Minimum Controls have been met. If there are areas which requireother Shell Technical or HSSE Experts prior to making a final assessment of the facility (see attached list). 说明: 技术专家和控制要求. 如需要额外的指导, 评估人可和壳牌公司技术和HSSE 专家进行咨询,以完成最终的评估