7003 aluminium pipes Standard:ASTM-B-210,ASTM-B-221,ect out diameter: ... , butt welded by mechanized or manual gas-tungsten or gas-metal arc-welding methods with or without the use of filler ... metal.1035,1040,1045,1050,1050A,1060,1065,1070,1070A,1080, ... ,8014,8021,8050,8150,8079,8090,8A01,8A06, 7003 aluminium pipes