... DN15-DN2500. ASTM a105 flange class 150 The specification is as follows:1-American Standard:ANSI B 16.5, ASTM, ASA, API-605 ... 5K, 10K, 16K, 20K, 30K, SDPFF, SOHFF, BLFF etc.5-Other standard:UNI2276, 2277, 2278, 6084, 6089, 6090, 2544 ... 2 1/2 (DN15) TO 80(DN2000;)Type: Welding Neck Flanges, Slip-on Flanges, Blind Flanges, Threaded Flanges, ... or pallets for vessel transportation ASTM a105 flange class 150