The metallurgical advancements exhibited in creep strength enhanced ferritic (CSEF) steels have changed the dynamics of boiler design and operation by improving the fatigue life of thick-walled components and improving cycle efficiency by increasing operating temperatures. These advancements have a similar effect on the assessment of these materials. No longer can a serviceability evaluation be based on a general assumption of metallurgical properties. Instead, condition assessment protocols, examination methods, and flaw assessment approaches must reflect the metallurgical nuances of these high temperature alloy steels. This paper will provide guidance on new issues to be considered when developing a serviceability program.

Issue Section:
Technical Brief
Keywords:
PVP materials
Topics:
Alloy steel, Boilers, Creep, Design, Maintainability, Steel, Materials properties, Temperature, Stress, Rupture

References

1.
U.S. Energy Information Administration, U.S. Department of Energy
, “Electric Power Annual
2009
.” Available at: www.eia.gov/cneaf/electricity/epa/epa_sum.html
2.
ASME,
2013
, “
Section I: Rules for Construction of Power Boilers
,”
2013 ASME Boiler and Pressure Vessel Code, ASME Boiler and Pressure Vessel Committee on Power Boilers
, ASME, NY.
3.
ASME,
2013
, “
Section II: Materials, Part D Properties (Customary)
,”
2013 ASME Boiler and Pressure Vessel Code, ASME Boiler and Pressure Vessel Committee on Power Boilers
, ASME, NY.
4.
Electric Power Research Institute,
2006
,
Metallurgical Guidebook for Fossil Power Plants
,
Electric Power Research Institute
,
Palo Alto, CA
.
5.
U.S. Energy Information Administration
, Today in Energy,
2011
, “
Most Coal-Fired Electric Capacity Was Built Before 1980
,” www.eia.gov/todayinenergy/detail.cfm?id=1990
6.
U.S. Energy Information Administration, Analysis & Projections
,
2013
, “
Annual Energy Outlook 2013
,” www.eia.gov/forecasts/aeo/MT_electricfm
7.
DiStefano
,
J. R.
, and
Sikka
,
V. K.
,
1986
, “
Summary of Modified 9Cr–1Mo Steel Development Program: 1975-1985
,” Oak Ridge National Laboratory, Oak Ridge, TN, Report No. ORNL-6303.
8.
Ward
,
C. T.
,
Henry
,
J. F.
, and
Arnold
,
J. L.
,
2004
, “
Stress Corrosion Cracking of Creep-Strength Enhanced Ferritic Steels
,”
EPRI Boiler Tube and HRSG Tube Failures and Inspections International Conference
,
San Diego, CA
, Nov. 2–5.
9.
Taylor
,
M. J.
, and
Fuller
,
L. C.
,
1986
, “
Coal-Fired Electric Power Plant Life Extension: An Overview
,” Oak Ridge National Laboratory, Oak Ridge, TN, Report No. ORNL/TM-10023.
10.
ASME PCC-3-2007
,
2008
,
Inspection Planning Using Risk-Based Methods
, ASME Boiler and Pressure Vessel Code, ASME Boiler and Pressure Vessel Committee on Power Boilers,
ASME
,
NY
.
11.
Arnold
,
J. L.
,
2000
, “
Developing a Life Management Project—Identifying the Appropriate Technologies
,” ICOLM 2000, Life Management and Life Extension of Power Plant, Xian, China.
12.
Electric Power Research,
1993
,
Life Assessment of Boiler Pressure Parts, Volume 1: Executive Summary
,
Electric Power Research Institute
,
Palo Alto, CA
.
13.
Wang
,
K.
,
Wang
,
L.
,
Cui
,
W.
, and
Liu
,
C.
,
2006
, “
Effect of V an V–N Microalloying on Deformation-Induced Ferrite Transformation in Low Carbon Steels
,”
J. Mater. Sci. Technol.
,
22
(
2
), pp.
159
–
163
.10.1016/j.jmatprotec.2005.09.006
Google Scholar
Crossref
Search ADS
 
14.
Hyde
,
T. H.
, and
Sun
,
W.
,
2009
, “
A Novel, High-Sensitivity, Small Specimen Creep Test
,”
J. Strain Anal. Eng. Des.
,
44
(
3
), pp.
171
–
185
.10.1243/03093247JSA502
Google Scholar
Crossref
Search ADS
 
15.
Henry
,
J.
,
2012
, “
Inspection Issues and Control of Material Quality for Grade 91 and Other Creep Strength-Enhanced Ferritic CSEF Steels
,”
EPRI Welding and Repair Conference
,
Marco Island, FL
, June 26–29.
16.
Anderson
,
T.
, and
Shein
,
J.
,
2009
, “
Hand-Held XRF Analyzers Advance PMI Programs
,”
AWS Insp. Trends
, Winter, pp.
16
–
18
.
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