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ASME PTC 4 Document Information:
Title
Fire Steam Generators
ASME International
Publication Date:
Jan 1, 1998
Scope:
General Scope. The rules and instructions presented in this Code apply
to fired steam generators.
These include coal, oil, and gas fired steam generators as well as
steam generators fired by other
hydrocarbon fuels. The scope also includes steam generators with
integral fuel-sulfur capture
utilizing chemical sorbents.
Steam generators which are not fired by coal, oil, or gas may be
tested using the concepts of this
Code, but it should be noted that the uncertainty caused by
variability of the fuel may be
difficult to determine and is like]y to be greater than the
uncertainties in sampling and analysis
of coal, oil, or gas.
Gas turbine heat recovery and other heat recovery steam generators
designed to operate with
supplemental firing should be tested in accordance with Performance
Test Code (PTC) 4.4, Gas
Turbine Heat Recovery Steam Generators.
This Code does not apply to nuclear steam supply systems, which are
specifically addressed in PTC
32.1, Nuclear Steam Supply Systems. This Code does not apply to the
performance testing of chemical
heat recovery steam generators, municipal waste fired steam
generators, pressurized steam
generators with gas side pressure greater than 5 atmospheres, or
incinerators. Municipal waste
fired steam generators can be tested in accordance with PTC 34, Waste
Combustors with Energy
Recovery.
Testing of auxiliary equipment is not addressed in this Code, but
shall be governed by the
following Performance Test Codes which apply specifically to the
equipment in question:
• PTC 4.2, Coal Pulverizers.
• PTC 4.3, Air Heaters.
• PTC 11, Fans.
Steam purity and quality shall be tested in accordance with PTC 19.11,
Water and Steam in the Power
Cycle (Purity and Quality, Leak Detection and Measurement).
Methods used by this Code for determining emission related parameters,
e.g., sulfur retention and
flue gas constituents, are not equivalent to methods required by EPA,
New Stationary Source
Performance Standards, 40CFR60 and are not intended to be used for
evaluating compliance with those
standards or any other environmental regulations.
This Code does not prescribe procedures for testing to determine
chemical and physical properties
of fuels. Applicable procedures may be found in the PTC 3 series or
other pertinent standards such
as those published by ASTM.
This Code specifically addresses equipment used for the generation of
steam; however, the basic
principles presented are also applicable to other working fluids.
Certain types and sizes of equipment used for the recovery of heat
released by combustion are not
addressed in any specific Performance Test Code. This Code can be used
as a general guide in
developing performance tests for such equipment; however, such
specially developed performance
tests shall not be considered ASME Code tests.
Design Variations. This Code provides general procedures for
conducting combustible fuel fired
steam generator performance tests; however, it cannot possibly provide
detailed procedures
applicable to every steam generator design variation. Design
variations considered in developing
this Code include subcritical and supercritical once-through steam
generators and oil, gas, stoker,
cyclone, pulverized, and fluidized bed firing. For each performance
test, a competent engineer must
study the actual steam generator and its relation to the remainder of
the steam cycle, and develop
test procedures which are consistent with this Code.
Reports. A test report shall be prepared. See Section 6.
References. Many references provide useful supplemental information in
planning for a performance
test in accordance with this Code. Those used most frequently are
listed in Section 3.3.
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