Jinan Shuangke Forging Mechancial Co., Ltd, which is a professional manufacuture can offer variety of flange, such as plate flange, welding neck flange, threaded flange, slip-on flange, socket weld flange. All the products refer to ANSI, DIN, JIS, GOST-12820, EN1092-1, SABS1123, BS4504 etc. They are exported all over the world.