flange 1. size:1/2'-48" 2.Standard: ANSI, ASME, DIN, JIS, BS,GB 3.Material: carbon steel (seam & seamless) ProductsPIPES,Elbow, Bend, Tee ,Reducers ,Flange ,Cap , Corrugated Expansion Joint, Metal hoseMaterialASTM:A234-WPB, WP1,WP5,WP9,WP11,WP12,WP22,WP91,WP92,A420,WPHY42,WPHY52,WPHY60,WPHY65,WPHY70,WP304,WP304L,WP304H,WP316,WP316L,WP321,WP347,WP347HDIN:ST37.0,ST35.8,ST45.8,S235JR,P235GH,P265GH, ...