The present invention discloses a process for cracking a hydrocarbon feedstock into olefinic hydrocarbon products in a furnace at a temperature of {HEAD ~ above about 1300° F.} in a reactor furnace tube comprising {TAIL ~ a plurality} of reaction lines constructed of a temperature resistant, non nickel containing material 
The present invention discloses a process for cracking a hydrocarbon feedstock into olefinic hydrocarbon products in a furnace at a temperature of { HEAD ~ above about 1300 ° F. } in a reactor furnace tube comprising { TAIL ~ a plurality } of reaction lines constructed of a temperature resistant , non nickel containing material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH