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:
Jun. 28, 1994
Filed:
Aug. 20, 1992
Applicant:
Inventor:
Jonas Rosen, Sandviken, SE;
Assignee:
Sandvik AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428679 ; 428683 ; 428685 ; 138143 ;
Abstract
A composite tube with improved resistance to thermal fatigue and stress corrosion for use in soda recovery units comprising an inner tubing of a conventional carbon steel and an outer liner of a Cr--Ni--Mo--Fe-based alloy with austenitic structure which alloy contains, in weight-%, 0.01-0.04 C, 19.5-23.5 Cr, 38-46 Ni, 2.5-3.5 Mo, up to 0.5 Si, up to 0.3N, and the remainder being Fe, except normal impurities.