1.flange types: slip-on flange(bridas slip on), welding neck flange(bridas welding neck), blind flange(bridas blind), socket welding flange(bridas socket welding), threaded flange(bridas threaded), lap joint flange(bridas lap joint) and plate etc; 2.flange standard: (1) ansi b16.5, a105 150lb 300lb 600lb 900lb 1500lb 2500lb (2) din 2573 pn6 din 2576 pn10 din2502 pn16 din2503 p25-40 din2566 pn16 din2631-2635 rst37.2 or c22.8 (3) jis ss400 or sf440 5k 10k 16k 20k 30k (4) uni 2276 2277 2278 6084 6089 6090 2544 2282 6091-6093 (5) en1092 pn6 pn10 pn16 pn25 pn40 type1 type2 type 5 type 12 type 13 (6) bs4504 sani1123 10003, 16003, 25003, td, te, tf carbon steel flange (7) as2129 table d table h table e carbon steel flange (8) gost 12820-80 12821-80 carbon steel flange 3.size: 12" - 24" 4.surface treatment: antirust oil, black yellow transparent electric galvanized hot galvanized 5.packing: sea-worthy packing in wooden cases or on wooden pallets or as per customers' special requirement 6.min order quantity: according to customer's requirement 7.delivery: 25 days after receiving the formal order; 8.payment: by tt or lc 9.applications range: petroleum, chemical industry, water conversancy, electric power, natural gas, coal gas, water power and other pipeline projects.