Tender For supply of procurement of gas connection union having back fire resistance arrangement with 20 mtrs. long hose pipe of 10 mm dia. to is:447/88 (re-affirmed 2018) for da with nut and nipple & clamp fitted on the end. nut and nipple as per is : 6016-2009 (re-affirmed 2021), clamp as per is : 4762-2002 (re-affirmed 2021).