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nfmin8459

金虫 (小有名气)

[求助] 急求翻译

Unless otherwise specified, provisions shall be made for flushing the sample conditioning system and analyzer with nitrogen or instrument air prior to disassembly for maintenance. Systems containing hydrocarbons must use nitrogen. The flushing connection shall be immediately upstream of the fast loop filter. The primary connection to the sample line shall be a three way valve with a second double block and vent three way valve to isolate the nitrogen/instrument air. If process pressure is higher than utility pressure, a check valve and removable flexible hose connection shall be provided.


The chromatograph analyzer and its controller shall be either wall or rack mounted in the analyzer shelter. The analyzer controller and all associated electrical systems shall be installed in enclosures suitable for the electrical area classification specified on the Instrument Data Sheets. The preferred method is a purged enclosure in accordance with NFPA 496.

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sadmissyou

金虫 (小有名气)

【答案】应助回帖

nfmin8459(金币+50, 翻译EPI+1): 2011-11-12 18:24:56
除另作说明外,应对在设备拆卸维护前使用氮气或者仪表气源对样品调节系统和分析器进行冲洗作出规定说明。系统含有碳氢化合物(烃类)时必须使用氮气。冲洗连接(接口?)必须在快回路滤波器上游。对样品管线的主要连接应为带有第二个双重阻塞部件(a second double block。。拿不准)的三通阀和三阀门排气口以隔离氮气或者仪表气源。若处理压力高于效用压力,应提供止回阀(?)和可拆卸的软管连接。

色谱分析器及其控制器应壁挂式安装或框架式安装于分析器外壳内。分析器控制器及相关的电气系统应被安装于外壳内并符合仪器数据表(手册)上规定的电器区域分类。首选的方法是符合NFPA (美国消防协会?)496的净化外壳。

仅供参考。。。
2楼2011-11-12 17:17:09
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