... Welding neck flanges, Spectacle flanges,TG flanges,Socket welding flanges and Threaded flanges,Square flanges.6. Pressure ratings :class:150 300 ... Sealing surface : FF ,RF, LJ, FM ,RTJ,RJ ,MALE ,FEMALE and so on .8. Used for : petroleum,chemical,power,gas,water ... port : port of China.19. Our objective:Survival by quality and development by credibility,quality first,customer upmost !20. Our declaration : ...