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..