Reducer always assemble with carbon steel pipes, flanges and other pipe fittings for transporting petroleum, natural gas and other gas & fluids. Products of a hundred specifications are used for the various applications in regular, pressure, submarine, low-temperature, high-temperature corrosion-resistant and other pipelines. We can supply products according to international standards such as API 5L, ASTM, ASME, JIS, DIN, EN, etc. And the products also can meet the customer's special specification by mutual agreement