1.HRT-1 <=100C, HRT-2<=125C, HRT-3<=150C HRT-2<=175C 2.GB/T2002-2005 and GB/T7984-2001 3.ISO/FDIS14890-199 Models:Heat resistant conveyor belts fall into three modelsMode1: able to with stand the test temperature of less than 100°C, code S1 Mode2: able to with stand the test temperature of less than 125°C, code S2 Mode3: able to with stand the test temperature of less than 150°C, code S3 Mode4: ...