tender for purchase of s.s. tubes---1 s.s. tubes of 304 grade as per specification according to is. 13316/1992, hydraulically tested at 1000 p.s.i. annealed and pickled at 1100 deg. centigrade tensile strength 650 kns/mm2 elongation 50%(a) size : od = 45 mm, length = 2010 mm, thickness = 1.5 mm 2 (b) size: od= 45 mm, length = 4065 mm, thickness = 1.5 mm 3 (c) size : od =102 mm, length = 1225 mm, thickness = 1.5 mm 4 (d) size : od =102 mm, length = 900 mm, thickness = 1.5 mmthe following physical tests are to be carried out and all tests certificates should be attached with the invoices.(i) flattening test.(ii) reverse bend test.(iii) reverse flattening test.(iv) hardness test.)make : (i) m/s quality stainless pvt. ltd., hisar.(ii) m/s divine tubes pvt. ltd., ahmedabad.(iii) m/s adinox overseas, mumbai.(iv) m/s apex tube pvt. ltd.,orany approved make by haryanasugarfed or national sugarfed