PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

12.6 Lubrication.
All the points where lubrication is needed, the Contractor shall furnish full details of
the method to be employed. The supply of the requisite lubricating equipment and
lubricants for commissioning and operating and maintaining the valves shall be
furnished.
12.7 Flanges.
Valves of sizes 80mm – 1000mm shall have flat flanges as per relevant IS. The
flange-to-flange distances shall be as per IS 14846.
12.8 Jointing Materials.
Each valve shall be supplied under this Contract, with all requisite joint rings, nuts,
bolts and washers for making the joints on all the valves to be installed under this
Contract. Jointing material between the connecting flanges shall conform to the
relevant IS code. Unless otherwise specified bolting used for jointing exposed
connections shall be of carbon steel, conforming to IS: 210 Grade 20 Grade B, with
galvanized finish.
12.9 Factory Tests.
All the valves shall be tested at the factory for smooth, trouble free operation and
operating torque requirements by operating between fully open and fully closed
position three times.
The hydrostatic tests shall consists of Closed End Tests where valve is held on both
sides. Each valve is subjected to three hydraulic tests.
a. Wedge open and pressure applied for 5 minutes to the whole body of the
valve pressure given in Section 19.4.
b. Second Test shall be applied to one face with pressure given in Section 19.4.
c. Third Test shall be similar to second, but pressure applied to the other side of
the wedge with same pressure.
For valves having terminal position shall be subjected to open-end test.
GTS : General Technical specification. Page 95