supply of welding hose with fluted cover , welding hose with fluted cover for acetylene (red colour) of8mm bore, co nforming to spec. is 447/87 (minimum length 30 meters)with following parameters. the h ose shall be indelibly marked withisi standard mark, manufacturers trade mark, hose d imension andmonth and year of manufacture.1)lining tensile strength (min) : 5 mpa2)cov er tensile strength (min) : 7 mpa3)lining elongation at break (min) : 200%4)cover elongat ion at break (min) : 300%5)bursting pressure (min) : 5.0 mpa6)increase in outside diameter at working pressure:-5 to +15percent maximum7)no leakage or other sign of weakness shall be observed at ahydrostatic test pressure of 2.5 mpa for one minute. [ warranty p eriod: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]