... inch TO 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 ... : ASTM B16.5:150LBS,300LBS,400LBS,600LBS,900LBS,1500LBS,2500LBS DIN:6Bar,10Bar,16Bar,25Bar,40Bar, BS4504,PN2.5-PN440,BS10 ...