Production process of U-type tube for high-temperature heater

The invention discloses an internal thread seamless steel pipe internal mold production process. The production process comprises the following steps of step 1), wire wrapping; step 2), powder adding;step 3), pipe contracting; step 4), turning; step 5), heat treatment; step 6), molding; step 7), wel...

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Bibliographic Details
Main Author ZHOU YIXIN
Format Patent
LanguageChinese
English
Published 26.11.2019
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:The invention discloses an internal thread seamless steel pipe internal mold production process. The production process comprises the following steps of step 1), wire wrapping; step 2), powder adding;step 3), pipe contracting; step 4), turning; step 5), heat treatment; step 6), molding; step 7), welding; step 8), moisture removing; step 9), sealing; step 10), leakage detecting; and step 11), spotwelding. The invention belongs to the technical field of U-type tube production for high-temperature heaters, and specifically relates to a U-type tube for a high-temperature heater with relatively high strength and good chemical stability at a high temperature, which solves the technical problem that the service life is low due to the fact that an electric heating tube for a traditional high-temperature heater is annularly arranged, and meanwhile, the risk of danger of personal injury of workers from thermal cracking and explosion due to stress concentration problems is avoided; and besides,the U-type tube is simple
Bibliography:Application Number: CN201910876904