Group 1 - The core achievement is the successful development of deep-sea oil and gas dual-metal metallurgical composite pipes by China National Petroleum Corporation's Baoshi Pipe Industry Co., Ltd, marking a significant technological breakthrough in the domestic market [1] - The newly developed N06625 + X65MS D610×(2+16.9) mm dual-metal composite pipe features an outer layer of 16.9 mm thick X65MS acid-resistant carbon steel and an inner layer of 2 mm thick N06625 nickel-based alloy, designed to withstand extreme corrosive environments [1] - The product has passed certification by the China Classification Society, providing essential equipment support for the development of deep-sea oil and gas resources in China [1] Group 2 - The demand for deep-sea oil and gas transportation pipes has been increasing due to the extension of oil and gas exploration into deep waters, which presents multiple challenges such as extreme low temperatures, high pressure, and corrosion from high-sulfur and high-acid environments [1] - A specialized technical team formed by Baoshi Pipe Industry and the National Pipeline Research Center successfully overcame the technical challenges associated with welding nickel-based alloys and carbon steel, developing efficient welding processes that ensure high corrosion resistance [2] - Innovations in precision control of carbon steel base pipes and low dilution rate welding of nickel-based alloys have enabled the industrial production of deep-sea oil and gas dual-metal composite pipes [2]