bids are invited for boq total quantity : 1---1 flange blind hdpe 110 mm, od 228 mm, bcd 190mm, holes 8, hole dia 20 mm, thk 25 mm 2 flange blind hdpe 32 mm, od 108 mm, bcd 79 mm, holes 4, hole dia 16 mm, thk 15 mm 3 flange blind hdpe 40 mm, od 117 mm, bcd 89 mm, holes 4, hole dia 16 mm, thk 15 mm 4 flange blind hdpe 50 mm, od 127 mm, bcd 98 mm, holes 4, hole dia 16 mm, thk 20 mm 5 flange blind hdpe 63 mm, od 152 mm, bcd 121 mm, holes 4, hole dia 20 mm, thk 20 mm 6 flange blind hdpe 75 mm, od 178 mm, bcd 140 mm, holes 4, hole dia 20 mm, thk 25 mm 7 flange blind hdpe 90 mm, od 190 mm, bcd 152 mm, holes 8, hole dia 20 mm, thk 25 mm