API RP 550-1-2-1980
Manual on Installation of Refinery Instruments and Control Systems - Part I - Process Instrumentation and Control Section 2-Level (Third Edition)
- 标准号
- API RP 550-1-2-1980
- 发布日期
- 1980年01月01日
- 实施日期
- 1980年01月01日
- 废止日期
- 无
- 中国标准分类号
- /
- 国际标准分类号
- /
- 发布单位
- API - American Petroleum Institute
- 适用范围
- This section discusses recommended practices for the installation of the more commonly used instruments and devices for indicating@ recording@ and controlling liquid levels and liquid-liquid interface levels normally encountered in petroleum refinery processes. The types of instruments covered are: 1. Locally mounted indicating gages (Par. 2.3)@ including tubular gage glasses@ armored-type gage glasses@ float-and-cable (automatic) tank gages@ hydrostatic head pressure gages@ and differential pressure level indicators. 2. Level transmitters (Par. 2.4)@ including displacers@ differential pressure types@ hydrostatic head types@ and electric and electronic types. 3. Locally mounted controllers (Par. 2.5)@ including displacers@ ball floats@ and differential pressure types. 4. Remote or panel-mounted receivers (Par. 2.6). 5. Level alarms (Par. 2.7). 6. Accessories (Par. 2.8)@ including seals and purges@ gage glass illuminators@ and weather protection.