en1092-1 type 11 welding neck flange, 1/2 inch TO 80 inch, carbon steel, stainless steel 1.welding neck flange/WN ... 4.To be equality WN flange Pressure: ASTM B16.5:150LBS,300LBS,400LBS,600LBS,900LBS,1500LBS,2500LBS DIN:6Bar ... ,10Bar,16Bar,25Bar,40Bar, BS4504,PN2.5-PN440,BS10:Table D,E,F,H, JIS:5K ... ., R.F., R.T.J. Stangard ASME B16.5 ASME B16.47 MSSSP-44 API605 EN1092 BS3293 ISO 15590 ...