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:
May. 31, 2016
Filed:
Feb. 08, 2013
Edwin Hall Niccolls, Danville, CA (US);
Grzegorz Jan Kusinski, Moraga, CA (US);
David Lawrence Cooke, San Rafael, CA (US);
Edwin Hall Niccolls, Danville, CA (US);
Grzegorz Jan Kusinski, Moraga, CA (US);
David Lawrence Cooke, San Rafael, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A method for forming structural equipment employed in sulfur containing environments such as oil refineries and the like. In one embodiment, the method comprises: providing a steel composition containing up to 0.35% of C, 0.30 to 3.5% Si, up to 1.2% Mo, up to 1.35% Mn, up to 5% Al, less than 12.0% Cr, balance of Fe and unavoidable impurities; forming a structural component conforming to prevailing industry standards with respect to design, fabrication, inspection and testing, metallurgical and mechanical properties. The structural equipment has a corrosion rate of less than 15 mpy. In one embodiment, the equipment is formed from a steel composition has a carbon equivalent of less than 0.63, requiring no post weld heat treatment ('PWHT'). In another embodiment, the CE is less than 0.45, requiring no preheat nor PWHT.