e.
Reference and calibration gas system shall be provided for each
boiler consisting of gas supply, regulator with relief valve,
gauge and necessary valving and piping. Electrical power
connections and piping for distribution to calibration gas
connection on each analyzer shall be provided.
2.6.2
Fuel Oil Flow Transmitter
a.
Fuel oil flow transmitter shall be provided for each fuel oil flow
meter. Transmitter output shall be isolated 4-20 mA dc.
b.
Panel-mounted totalizer shall be connected to transmitter.
Necessary signal conditioning devices shall be provided to
integrate fuel oil flow transmitter with control and recording
instrument panels.
c.
controllers on device level network LAN. Smart transmitters shall
not reside on controller LAN.
2.6.3
Natural Gas Flow Transmitter
Natural gas flow transmitter shall be provided for each natural gas meter.
Smart transmitters may be used to communicate to associated controllers on
device level network LAN. Smart transmitters shall not reside on
controller LAN.
2.6.4
Steam Flow Meter-Transmitter
a.
Steam flow meter-transmitter shall be a Vortex-Bar meter probe
designed for pipe insertion type installation by means of hot tap
or other non-disruptive method. A steam flow transmitter shall
measure media flow by means of a vortex shedding flow element
located in flow stream.
b.
Steam flow meter-transmitter shall have sliding-type stem passing
through two pressure seals allowing proper positioning of sensor
in flow stream and isolation valve so that transmitter can be
completely removed from pipeline without disruption of process.
Steam flow meter shall be supplied with a two-wire preamplifier
with analog 4 to 20 mA dc output signal.
c.
Steam flow meter shall meet following performance criteria:
1. Pressure Rating:
To [950 kPa 125 psig] [205 degrees C 400
degrees F][_____].
2.
Seals:
Teflon.
3. Wetted Parts:
Type 316 stainless steel with 304 stainless
steel body.
4.
Flow Rangeability:
10:1.
5.
Linearity:
Plus or minus 1.0 percent (to 24 mA output).
6.
Repeatability:
Plus or minus 0.25 percent at maximum.
SECTION 15561A
Page 53