標準號：BS EN 61285-2004
中文標準名稱：工業過程控制.分析器罩的安全
英文標準名稱：Industrial-process control - Safety of analyser houses
標準類型：N18
發布日期：2005/1/6 12:00:00
實施日期：2005/1/6 12:00:00
中國標準分類號：N18
國際標準分類號：25.040.40;71.040.10
適用范圍：This International Standard describes the physical requirements for the safe operation of the process analyser measuring system installed in an AH in order to ensure its protection against fire, explosion and health hazards. This standard extends beyond IEC 60079-16 to include houses with Zone 2 interiors and to apply to toxic hazards. (Appropriate national guidelines on toxic hazards are to be followed.) This standard does not address facilities where dust is the hazard. Clause 4 addresses the location of the AH and connection within the process plant areas. Clause 5 addresses the design, construction and layout of the AH. It does not address parts of the analyser measuring system installed in other locations such as sample conditioning rooms (SCR) or switchgear rooms. Clause 6 addresses measures for reducing the danger of explosion for AHs while permitting maintenance of equipment with the power on and the case open. NOTE For most fluids, the major constraint is that the concentration of vapours, which are hazardous for personnel, is lower than the lower explosive (flammable) limit (LEL) (see Clause 7). Using n-Pentane as an example, the LEL is 1,4 % or 14 000 x 10