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combined water treatment

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Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 777-790, October 22–25, 2013,
... Abstract CWT (combined water treatment) was introduced in Japan in 1990 and over 50 power generation boilers are now in operation. However, the effect of oxygenated treatment on the steam oxidation of the ferritic-martensitic steels and austenitic stainless steels that are used for superheaters...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 1086-1097, October 11–14, 2016,
... degradation of the oxide scale as fracture due to straining. The results give further evidence that a reduction of the residual stresses by a stress relief heat treatment of the boiler in combination with the strict compliance of the limits for dissolved oxygen content in the feed water according to water...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 418-428, October 15–18, 2024,
... for repairing and costs at least half a million dollar per shutdown. In this paper, the investigation of the single-phase FAC in a high-pressure economizer of a combined cycle power plant is demonstrated. Water chemical parameters such as pH and dissolved oxygen are reviewed, the process simulation of the power...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 549-564, October 22–25, 2013,
... and Ti as precipitation hardening/strenthening elements in combination with B lead to increased creep properties when compared to T22. Additional requirements like no PWH treatment and a good forming behavior, i.e. cold bending, were clearly a demand from industry and incooperated in the concepts when...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 66-73, October 11–14, 2016,
.... et al, Analysis and Prevention of Cracking in Water Wall of 500MW Supercritical Unit, Proc 7th Conference on Failure Analysis and Life Management of Metal Components for Power Plants, Xi an, China, Oct. 2004, pp. 137-142. [3] Cui X. H.,Zheng F. P. et al, Influence of Heat Treatment Status...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 1018-1026, October 11–14, 2016,
... by specialized thermo(mechanical) treatment. The paper will outline the sensitivity of tensile, creep, stress relaxation and impact properties on processing and heat treatment. Furthermore an outlook on future development potentials will be derived. creep life creep properties heat treatment high...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 412-423, October 22–25, 2013,
... Abstract A combination of creep tests, ex-service blade samples, thermodynamic equilibrium calculations, combined thermodynamic and kinetic calculations, image analysis, chemical composition mapping and heat treatments have been conducted on PWA1483 to determine if microstructural rejuvenation...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 23-38, October 15–18, 2024,
... steel heat treatment laser powder bed fusion microstructure nitric acid nuclear applications pressurized water reactors seawater corrosion stress corrosion cracking Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference October...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1081-1092, October 22–25, 2013,
.... This is important in testing atmospheres containing water vapor in combination with low equilibrium oxygen partial pressure [11] to prevent contamination of the specimens by volatile silicon containing species released by silica glass components of the experimental setup. Discontinuous oxidation tests were carried...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 565-572, October 22–25, 2013,
... Abstract T24 tube material (7CrMoVTiB10-10), with its combination of high creep strength and potential to be welded without using preheat, is regarded as a candidate waterwall material for Ultra Supercritical (USC) boilers. However, its reputed sensitivity to hydrogen and potential...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 1098-1112, October 11–14, 2016,
... behaviour in high temperature water is being investigated. Here the influence of the temperature, the oxygen concentration of the water, the deformation speed of the sample, the heat treatment and the condition of the material on the SCC is analysed. boilers ferritic stainless steel heat treatment...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 628-639, October 21–24, 2019,
... of commercially available heat resistant austenitic stainless steels. An optimized thermo-mechanical treatment combined with selected minor alloying additions resulted in a refined grain structure with high thermal stability even at 1200°C, which improved room-temperature ductility without sacrificing the creep...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 120-130, October 22–25, 2013,
... hardening heat treatment: 800°C (1475°F)/8hr/AC. age hardening A-USC power plants creep properties HAYNES 282 alloy low cycle fatigue properties microstructural analysis tensile properties thermal stability water vapor oxidation weldability Advances in Materials Technology for Fossil Power...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 409-417, October 15–18, 2024,
... (WPS) of 740°C can be achieved. This enables the on-site service of valve seat repair and can be applied to other power plants. INTRODUCTION Currently, Post Weld Heat Treatment (PWHT) using heating elements to heat workpieces such as water or steam pipelines within power plants is widespread [1...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 924-930, October 11–14, 2016,
... like creep resistance. The paper discusses the oxidation behaviour of San25, 800H and alloy 263 in supercritical water at temperatures 650 and 700 °C at 250 bar, and compares the changes of mechanical properties of materials at these temperatures. austenitic stainless steel boilers creep...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 679-689, October 22–25, 2013,
... has a good combination of mechanical properties, high thermal conductivity, low thermal expansion coefficient and good resistance to stress corrosion cracking in water steam systems compared to austenitic stainless steels. The 9-12% Cr steels, such as grade 91, are also considered to be creep...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1232-1243, October 22–25, 2013,
... Abstract Welding of collector pipes, flat heads, dished ends and connector pipes performed with high temperature and creep-resistant steels most often has been performed using GTAW process combined with MMA processes. Progress in GMAW process and availability of high quality filler materials...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 554-570, August 31–September 3, 2010,
... cooled. One T91 Cr-Mo steel sample was left in an untempered condition and two others were normalized for one and three hours and then water quenched. An accelerated thermal degradation heat treatment was performed at 750C and interrupted at variously predetermined degradation times (30, 120 and 220...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 1020-1032, October 15–18, 2024,
... performance. By combining these studies, a critical assessment of variables was possible including the DED AM method (laser powder and gas metal arc wire), laser power, sample orientation relative to build orientation, chemical composition, and post-processing heat treatment. Detailed microstructure...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 880-891, October 21–24, 2019,
... being air cooled. Table 3: Post-manufacture heat treatment schemes applied to the alloys in the present work. All treatments were performed in air furnaces. ABD®-850AM Alloy 718 CM247LC Stage 1 980 °C for 2 hours, water quench 980 °C for 2 hours, water quench 1260 °C for 2 hours, air cool Stage 2 850 °C...