W-type Radiant Tube Standards:ASME,DIN,GB Material:Alloy Quality:ISO9001:2000 Package: ... ,T/T7.Application:1. Petrochemical:reforming furnaces(hydrogen,ammonia,methanol),cracking furance (ethylene,styrene,naphtha),pyrolysis and fired heaters etc.2 ... re-heating furnaces,steei mills and heat-treatment industries. Radiant tube is used as gas burner heater,there're W type ...