Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries LtdfiledCriticalSumitomo Metal Industries Ltd
Priority to JP8311377ApriorityCriticalpatent/JPS5418458A/en
Publication of JPS5418458ApublicationCriticalpatent/JPS5418458A/en
PURPOSE: To manufacture the electric welded tube of high quality with less welding defect, by supplying the liquefied nitrogen to the neighborhood of the end face opposite against each other between heating zone and the squeeze roll, on purpose to maintain the circumference around the electric weld zone at a nonoxidizing condition.
COPYRIGHT: (C)1979,JPO&Japio
JP8311377A1977-07-111977-07-11Welding method for electric welded tube
PendingJPS5418458A
(en)