... , DIN2638, DIN2673 and BS4504 standardsPressure ratings: Class 150, 300, 600, 900, 1500 and 2500PN6, PN10, PN16, PN25, PN40 and PN64JIS 5K, 10K, 16K and 20KMaterials: carbon ... gmail COM Flat Flange with Class 150, 300, 600, 900, 1500 and 2500 Pressure Ratings