... B16.48Types: Welding Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, Orifice Flanges, Lap Joint Flanges, Ring ... petroleum and gas fields. Following the principle of "Sincere Operation, Quality First and Customer Preferential", our company wholeheartedly welcomes all people ... cooperate with us for better development and a brilliant success. High Quality Flange