BS EN 61285 |
您所在的位置：网站首页 › c语言二级试题及答案 › BS EN 61285 |
|
非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 BS EN 61285-2004 前三页，或者稍后再访问。 如果您需要购买此标准的全文，请联系： 。 点击下载后，生成下载文件时间比较长，请耐心等待......
非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 BS EN 61285-2004 前三页，或者稍后再访问。 点击下载后，生成下载文件时间比较长，请耐心等待...... 下载 前三页 购买全文，请联系: 标准号BS EN 61285-2004 发布日期2005年01月06日 实施日期2005年01月06日 废止日期无 中国标准分类号N18 国际标准分类号25.040.40;71.040.10 发布单位GB-BSI 代替标准 BS EN 61285-2015 被代替标准 03/305413 DC-2003 BS EN 61285-1995 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. The level immediately dangerous to life or health (which is the maximum level from which a worker could escape within 30 min without any escape-impairing symptoms or any irreversible health effects) is only 0,5% or 5 000 x 10. Classification of a house interior as Zone 1 may imply that no technician can enter without protective equipment such as breathing gear. Placing an AH in a Zone 1 area would usually imply that no technician could approach the house without wearing protective equipment. Clause 7 addresses those measures for protecting personnel from materials in the atmosphere of AHs that are hazardous to health. |
今日新闻 |
推荐新闻 |
| CopyRight 2018-2019 办公设备维修网 版权所有 豫ICP备15022753号-3 |