... ,B class75,150,300 26"-60" AWWAAWWA C207 classB,D,E,F 4"-120" DINDIN2573,25272631,2632,2576,2543, ... flange is manufactured as per the drawings!Now I’d like to introduce our products,relevant reports and certifications ... own factory for twenty years.If you are interested in our products and wanna establish business ralations with us, ... to your enquiry! rough machining side piece forging made in China