Common standards for stainless steel flanges 1: National standard: GB9112-88 (GB9113·1-88～GB9123·36-88. 2: American Standard: ANSI B16.5, ANSI 16.47 Class150, 300, 600, 900, 1500 (TH, LJ, SW). 3: Japanese standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL). 4: German standard: DIN2527, 2543, 2545, 2566, 2572, 2573, 2576, 2631, 2632, 2633, 2634, 2638 (PL, SO, WN, […]