astm a105 welding neck flange 1.SIZE:1/2"-48" 2.ISO9001:2000,QS-9000 3.DIN,ASME,JPI,EN,BS,UNI,GOST, ... moderate price, hope we establish long cooperation relation.Nameastm a105 welding neck flangeSize: 1/2"-48"thick: sch40,sch80Pressure Class 150Lbs ... flange,socket welding flange,welding neckflangeStandard:ISO, GB 12459-2005, ASME B16.9 (ANSI), JIS B2311, DIN 2605Material: ASTM A234and A105 WPB S23520, ...