Eclipse manufactures Series 0100 nozzles for use on most standard forehearth burners which use premixed combustion air and gas. The nozzles are typically made of type 304 stainless steel. The stainless steel is rated good for approximately 1500 F (816 C) under continuous operation without excessive scaling. Other materials are available as options.
Typical operating pressures at the nozzle are between .5 and 8 IWC (12.7 – 203.2 mmH20). At high temperatures, inter granular attack is one of the main sources for corrosion, especially with the presence of sulfur. Type 446 stainless steel offers the best resistance to inter granular attack. Type 316 stainless steel offers less resistance to inter granular attack, but it is rated better than the type 304 stainless steel.
If the presence of sulfur or other aggressive agents (i.e., chloride) is not predominating, then type 316 stainless steel would be adequate for the application. A special quote is required for 446S/S for 5/8″ (15.875 mm) diameter, due to material availability and the higher cost.
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