supply & delivery of pvc flexible suction & delivery hose pipeitems for different govt own & operated major rli schemes under assistant engineer ( a-m ) purulia-ii ( agri-mech ) sub-division under the jurisdiction of purulia ( agri-mech ) division, belguma, purulia under non-planned maintenance work- supply of 150 mm dia nominal bore pvc flexible suction & delivery hose pipe (heavy duty) [ isi marked ]specifications :id: min. 151mm, max. 152.4 mm, wall thickness : min. 7.5 mm, max. 8 mm, pitch of spiral : uniform with tolerance ±2% and reinforcement no. 75 ± 5 per mtr, coil length : 20 mtr., colour : green or gray., hydro static proof / working pressure test : 4 kgf/sq.cm at 27±2 °c for 5 min., hydro static burst pressure test : 8 kgf/sq.cm at 27±2 °c for 1 min., resistance to vacuum : 625mm of hg (approx)., loss in mass on heating : < 3% of mass of the sample subject to heating at 130±3 °c for a period of 3 hours. { as per is: 15263/2003 with latest ammendments }