... 80 inch, carbon steel, stainless steel 1.welding neck flange/WN flange/flange 2. 10years professional service 3.Size:1/2"-80aa ... ,TUV,PED,ISO 4.To be equality WN flange Pressure: ASTM B16.5:150LBS,300LBS,400LBS,600LBS,900LBS ... D,E,F,H, JIS:5K,10K,16K,20K,30K· Face Type: F.F., R.F., R.T.J. ... 44 API605 EN1092 BS3293 ISO 15590-3 : Non standard Flange According to the drawing size/charting from dn15 to ...