ISA 77.43

W/D S/S BY ISA 77.43.01

The scope of this Standard is to address the unit/plant demanddevelopment subsystem for boilerswith steaming capacities of 200,000 lbs/hr (25 kg/s) or greater. Thissubsystem includes firingrate demand development, throttle/header pressure control, and unitmegawatt/steam flow control asapplicable.

This Standard will address two types of process applications:

1) a single boiler supplying a single turbine, typical of an electricutility power plant; and

2) a single boiler or multiple boilers supplying a common distributionheader, typical of anindustrial power plant.

Specifically excluded from consideration are:

1) dispatch control;

2) turbine/generator control (other than turbine demand);

3) combustion controls (covered separately by ISA-S77.41, Fossil FuelPower Plant Boiler CombustionControls);

4) steam distribution control systems;

5) economic loading of boilers; and

6) fluidized bed boilers.

Edition:

94

Published:

01/01/1994

ANSI:

ANSI Approved

Number of Pages:

26

File Size:

1 file , 220 KB