... steam/hydrocarbon reforming for catalyst tubing, convection tubing, pigtails, outlet manifolds, and quenching-system piping; in ... UNS N08810):Hydrocarbon processing - catalyst tubing, convection tubing, pigtails, outlet manifolds, and quenching-system piping.Ethylene, Oxy ... - heater tubing, convection and cracking tubes, and pigtails, tubing in hydrogenation heaters, Heat treating furnaces - radiant ...