American standard lap joint flange production implemented strictly in accordance with ANSI, the main materials are: carbon steel, stainless steel, alloy steel.American standard lap joint flange is mainly used in pressure vessel, oil and gas pipeline engineering, pipeline engineering, chemical plants, municipal engineering, sewage treatment, power plant, shipbuilding, pharmaceutical, dairy products, beer, beverage, water conservancy and other industries.American standard lap joint flange product quality through ISO9001:2008 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health and safety management system, special equipment manufacturing license pressure pipes.