tender for s.s. tubes of 304 grade tender for s.s. tubes of 304 grade , 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 , ( b ) size: od= 45 mm, length = 4065 mm, thickness = 1.5 mm , ( c ) size : od=100 mm, length = 1225 mm, thickness = 1.5 mm , ( d ) size : od =102 mm, length = 900 mm, thickness = 1.5 mm the 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 scrodite stainless indian pvt. ltd., sanchore rajasthan. ( iv ) m / s paras bhavani steel pvt., ltd., mehsana ( guj. ) ( v ) apex tubes