Carbon Free rubber hose pipe manufactured in synthetic SBR rubber tube reinforced with rubberised textile fabric plies or high tenacity synthetic yarn used as furnace door coolant hose with asbestos covered without outer asbestos covering for electrical cable coolant with low leakage current (less than 20 Micro Amp. at 6 KV D.C. and minimum resistance of one Megaohm per inch at 1000 volts DC.)