ESSAR图纸注释？ 16.all instrumentation tubing , piping and valves in acid service to be 316 stainless steel or better unless noted otherwise. 所有酸性场合的 仪表 管 、管道和阀门均为316不锈钢或更好的材质，除非另有注释。 17.the engineering and construction contractor is to minimize the total line loss ( friction+static head losses) from outlet of contractor tube bundle to the suction trap to equall or less than 0.14kg/cm2.e&c contractor is to verify dupont's line size . 设计和建造承包商应将从 承包商（换热）管束出口 至 入口捕集器（疑为泵入口的过滤器或压缩机入口的气液分离器） 的 总管线压力降（摩擦阻力降+静压降） 降低到小于或等于0.14kg/cm2。设计和建造承包商应 校核杜邦的管径 。 18. the alignment of the impeller and driver shafts is essential for proper operation of the contactor reactor. to maintain good alignment , it is recommended that the contractor shell and driver supports sit directly on a common steel reinforced mat. this is necessary to prevent unequal settling. the contractor installation and maintenance manual will provide additional instructions concerning the foundation . 叶轮和驱动轴 的 对中 对于接触反应器的正确操作非常必要。 为了保持良好的对中 ，建议 承包商 壳体和驱动器支座 直接位于 同一个 钢 加强座 上， 这对于防止 不均匀沉降 来说是非常必要的 。 承包商 的安装和维修手册 应提供有关地基的附加说明 。 19.seal flush filters are to be located at grade and be easily accessible to unit operators and maintenance personnel. frequent cleaning of the elements is required during unit startup. allow adequate clearance above filters to allow removal of element. 密封冲洗过滤器应安置在 地面 ，并易于装置操作和维修人员接近。装置开车期间应定期对滤芯进行清洗。滤芯上方应留有足够的间隙，以便拆卸滤芯。查看更多
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