... , ASTM B163Size (MM)OD6-219*Thk0.4-12.5*LApplicationHeat exchanger, condenser,cooling tower etc.Certificated byB&V, ISO9001:2008, A ... ), ISC(Iran ), BHEL (India), Media airconditoning, SUMSUNG (Korea), GNG Co., Ltd.(Korea), ZAN (Japan). GE ( USA) etc. UNS No2200 Nickel tube for heat exchanger