Procurement of quick exhaust valve g1 2 inch for quick closing non return valve 18 inch and 20 inch c300spl as per npcil doc no rapp 7 8l43113l6001 and 6002lgalr1 tag no 4311 nrv 6008 and 6010 make ms bhel, tube od 16 x 2 sa213tp316ti for quick closing non return valve 18 inch and 20 inch c300spl as per npcil doc no rapp 7 8l43113l6001 and 6002lgalr1 tag no 4311 nrv 6008 and 6010 make bhel rapp 7 8l43113l6001 6002lgalr1 tag no 4311 nrv 6008 6010 make bhel, ball valve for quick closing non return valve 18 inch and 20 inch c300spl as per npcil doc no rapp 7 8l43113l6001 and 6002lgalr1 tag no 4311 nrv 6008 and 6010 make bhel and other related items