... excellent quality,competitive price,prompt shipment RING JOINT FLANGE:1)Standard:ANSI B16.5,ASME B16.47,DIN,JIS,GB,BS etc.2)Material ... ETC. API 5L X42 X52 X60 X70 ETC.SIZE:DN: 1/2-80(10MM-2000MM)PRESSURE:SCH20, SCH30, SCH 40, SCH50 ... (WNF), THREDED FLANGE, RF, MF, FMF, TG, FF, SRF ETC.Ring joint flange,carbon steel flangeAPPLICATION: petroleum, chemical, electrical industry, construction. RJ ...