The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1991
Filed:
Sep. 05, 1989
Per I Persson, Nora, SE;
Exploweld AB, Nora, SE;
Abstract
The invention relates to a method of producing explosion-welded joints between the pipe or pipe lines. By carefully evaluating and testing the configuration of the ends of the pipes to be joined and also the functioning of the charge system, together with a system for encapsulating the charge and for determining the position of the charge during a welding sequence, it has been possible to provide a practical and reproduceable system which escapes the drawbacks of partial and poor weld bonds, cold-work hardening of the pipe material, and surface damage encountered with known systems of this kind. The method has been applied and tested on ferritic stainless material, so-called Duplex material, and on all carbon steel grades used in the production of pipe lines.