Details: procurement of materials: a) supply of pvc pipes of nominal dia 100 mm , wall thickness 5.0 mm , conforming to is : 12818/1997 (casing medium) a) supply of pvc screen (ribbed) pipes of nominal dia 100 mm , wall thickness 5 mm, conforming to is : 12818/1997 . lay flat hose of 75 mm nominal size polyster reinforced lay flat hose (the hose should has, wall thickness 1.3 ± 0.3 mm working pressure 3.0 kg/m2 & bursting pressure (9 kg/sqm). the lay flat hose should have a standard length of 100/200 m roll. drilling & develop[ment (depth of t.w - 60 mtr): a) drilling of bore hole of suitable diameter upto required depth by water jet system through any type of soil ncluding hire and labour charges for boring pipes, scaffolding, other tools and plants etc. and taking out the same all complete and other incidental works in this connection. the bore hole should have minimum 65 mm gap in between outside of the tube well pipe and the bore.ii) for lowering 100 mm dia pvc pipes. n.b.:-(a) m
Sector: Water Resource Department