Stub tube and boiler

A boiler comprising (1) : a header (7) through which a heat medium flows; a stub tube (8) branched from the header and having a base end part (8a) connected to the header (7) ; and a heat transfer tube (9) connected to a tip part (8b) of the stub tube (8), through which the heat medium from the head...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHIGEMORI, Hisanori, NIINO, Yuki, NAKAGAWA, Ryosuke
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING METHODS OF STEAM GENERATION STEAM BOILERS STEAM GENERATION WEAPONS
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Beschreibung
Zusammenfassung:	A boiler comprising (1) : a header (7) through which a heat medium flows; a stub tube (8) branched from the header and having a base end part (8a) connected to the header (7) ; and a heat transfer tube (9) connected to a tip part (8b) of the stub tube (8), through which the heat medium from the header flows, wherein the stub tube (8) has a thickness thicker than that of the heat transfer tube (9), and wherein an outer diameter of the stub tube (8) is larger than that of the heat transfer tube (9), and an inner diameter of the stub tube (8) is smaller than that of the heat transfer tube (9); to provide a stub tube having extended lifespan while suppressing an increase in a diameter of the stub tube as compared to the case in which the stub tube has the same inner diameter as a heat transfer tube.