... used in steam/hydrocarbon reforming for catalyst tubing, convection tubing, pigtails, outlet manifolds, and quenching-system ... ALLOY 800H (UNS N08810):Hydrocarbon processing - catalyst tubing, convection tubing, pigtails, outlet manifolds, and quenching-system piping. ... Oxy Alcohol, Vynil Chloride monomer production - heater tubing, convection and cracking tubes, and pigtails, tubing in hydrogenation ...