контекст
это ТУ на электростанцию9.2.1.4 Control and Instrument Piping Design and Selection Criteria
Control and Instrument piping shall be designed in accordance with the following criteria:
- The piping and instrument diagrams shall indicate the size and selection information for piping through the primary isolating valves. The line sizes and selection information of pip-ing after the primary isolating valves shall not be called out on the P&ID. ...
...
- Temperature indicators, temperature controllers, temperature switches, temperature detec-tors, and test well connections shall be as follows:
- HP, IP and reheat steam 40 mm Socket Weld
- LP steam 32 mm Socket Weld
- Boiler Feedwater 32 mm Socket Weld
- Duct temperatures 25 mm Nominal Pipe Thread
- All others 20 mm Nominal Pipe Thread
- Flow transmitter connections and piping through the primary isolating valves shall be 25 mm for all piping except orifice flanges where 15 rnm piping and valves shall be used.
- Level switch connections and piping through primary isolating valves shall be 25 mm.
- Level controllers and level transmitters of the displacement type shall have connections and piping through primary isolating valves of 50 mm.
- Level controllers and level transmitters of the differential pressure type shall have connec-tions and piping through primary isolating valves of 25 mm.
- Instrument columns at tanks and pressure vessels shall be 65 mm minimum
| 