Method for generating a stress reduction in erected tube walls of a steam generator

US10273551B2 · kind B2 · utility

Assignees

• MITSUBISHI HITACHI POWER SYSTEMS EUROPE, LTD. · DE
• GENERAL ELECTRIC TECHNOLOGY GMBH · CH

Inventors

• Jurgen Muller · Wulfen, DE
• Rudolf Thesing · Reken, DE
• Kurt Busekrus · Mülheim, DE
• Carsten Stegemann · Krefeld, DE
• Gerhard Weissinger · Alsdorf, DE
• Michael Heim · Holzgerlingen, DE
• Thoralf Berndt · Stuttgart, DE

Key dates

• Filing date: Oct 19, 2012
• Grant date: Apr 30, 2019
• Expiry date: Jan 14, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49387
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the case of a method for the heat treatment of erected, preferably large-area tube wall regions or tube wall segments, in particular of a diaphragm wall, of a steam generator, in particular of a power plant, in the installed state, it is sought to provide a solution which permits the use of steel types which are more problematic with regard to power plant operation with elevated steam parameters, in particular the steels T23 and T24, in the erection of steam generators. This is achieved in that the tube wall regions or tube wall segments for heat treatment are subjected, in the installed state in the steam generator, and in particular over a large area, to a stress-relief annealing process.