Supply of HDPE pipes ( working pressure PE- 80 ) of suitable normal pressure at PN 4 kgf/ sqmm of sizes suitable for hard soil. The size of the HDPE pipe shall be of 160 mm outer dia and 6. 2 to 7. 1 mm wall thick. Accepted makes- duke pipes, dolphin poly, Eonn plast india, texmo pipes, capital pipes or similar.