BS EN 61285-2004 工业过程控制.分析器罩的安全

标准号：BS EN 61285-2004
中文标准名称：工业过程控制.分析器罩的安全
英文标准名称：Industrial-process control - Safety of analyser houses
标准类型：N18
发布日期：2005/1/6 12:00:00
实施日期：2005/1/6 12:00:00
中国标准分类号：N18
国际标准分类号：25.040.40;71.040.10
适用范围：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