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:
Jul. 15, 2014
Filed:
Dec. 19, 2007
Applicants:
Jader Furtado, Saint Germain-en-Laye, FR;
Sophie Wastiaux, Aulnay-Sous-Bois, FR;
Inventors:
Jader Furtado, Saint Germain-en-Laye, FR;
Sophie Wastiaux, Aulnay-Sous-Bois, FR;
Assignee:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P 6/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for replacing tubes in a hydrocarbon-vapor reforming unit, that comprises before launching any new production campaign: measuring the expansion of the tube diameters; taking X-ray photographs of the tubes; realizing replicas of the surfaces of the tubes; wherein a tube is replaced when it fulfills at least one of the following conditions; the diameter expansion is higher than 3%; the X-ray photograph includes at least one crack; the replica shows a sufficient thermal ageing and/or creep deformation.