supply of ceramic fibre cloth covered synthetic rubber hose with woven textile to 31.5mm nominal bore to is:5821 / latest for electric arc furnace. technical specification: a ) minimum outside diameter of rubber hose 40.5mm b ) no. of plies: 4 and the finishing end of the last ply shall overlap the start of the first ply at least by 6.0 mm. c ) working pressure: 7 kgs / sq. cm d ) temperature: upto 90 deg centigrade, e ) bursting pressure: 28kgs / sq.cm, f ) length of the hose pipe: 9 mtrs or its multiples. note: 1 ) ceramic fibre cloth size: minimum 2mm thickness all over. 2 ) material test certificate or quality of hose and test pressure shall accompany the supply. 3 ) hoses shall be supplied without folds and suitably packed to avoid damage during transit. [ warranty period: 30 months after the date of delivery ]