Back to results
US 11,920,097 B2Granted
Oxy fuel gas mixtures and methods for use
AssigneePraxair Technology, Inc.
InventorsClayton Orivam De Morais, Keith G. Pierce, Marcos Müller Lobato
Life of this patent
Estimating the term…
Abstract
Fuel gas compositions for use in metal fabrication are provided comprising fuel gases comprising a base fuel gas mixed with from about 1% to less than 30% hydrogen.
Claims5
A method for heating a metal workpiece in a metal fabrication process, said method comprising:
- delivering a fuel gas mixture to a torch, the fuel gas mixture consisting essentially of:
- a 85-95% by volume natural gas;
- and from 5% to 15% hydrogen by volume;
- delivering oxygen to the fuel gas mixture to form an oxy-fuel gas mixture;
- igniting the oxy-fuel gas mixture to form a flame;
- contacting the flame to the metal workpiece at a predetermined location on the metal workpiece;
- and
- heating the metal workpiece.
5 more elements
A fuel gas mixture for an oxy fueled metal fabrication process, wherein said metal fabrication process is selected from cutting, welding, flame heating, soldering and brazing, said mixture consisting essentially of:
- 85-95% natural gas by volume;
- and 5-15% hydrogen by volume.
Dependencies are inferred from the claim text.