... 160, 150LBS-2500LBS ,5K-40K and so on .Sealing surfaceFF ,RF, LJ, FM ,RTJ,RJ ,MALE ,FEMALE and so on Applicationpetroleum ... ,2545 welding neck falnge DIN2631, 2632,2633,2634,2635 blind flange DIN 2527 PN6, PN10, PN16, PN25, PN40 threaded falnge DIN2565,2566 ... ,2567,2567 loose flange DIN 2641,2642,2656,2673Material: carbon steel ST37.2, stainless steel ...