LATENT HEAT RECOVERY TYPE APPARATUS FOR PRODUCING HOT WATER AND METHOD OF FABRICATING THE SAME

PROBLEM TO BE SOLVED: To provide a latent heat recovery type apparatus for producing hot water, which can reduce a fabrication cost by making a raw material cost of stainless steel inexpensive and has superior corrosion resistance.SOLUTION: The latent heat recovery type apparatus A for producing hot...

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Bibliographische Detailangaben
Hauptverfasser:	NAKATSUKA YUJI, HISHIDA TAKAHITO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BLASTING CHEMISTRY ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING METALLURGY PIPES RANGES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TREATMENT OF ALLOYS OR NON-FERROUS METALS VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a latent heat recovery type apparatus for producing hot water, which can reduce a fabrication cost by making a raw material cost of stainless steel inexpensive and has superior corrosion resistance.SOLUTION: The latent heat recovery type apparatus A for producing hot water includes a member 2 made of a ferritic stainless steel, wherein a chromium oxide film having a chromium concentration of 80% [cation atom%] or more is formed on a surface layer part of the member 2. Preferably, the ferritic stainless steel has a titanium concentration of 1% or less and a pitting resistance index less than 30 and the chromium oxide film is formed by adding heat treatment for high temperature oxidation to the member 2.