中国石油集团宝石管业有限公司
CNPC Baoji Petroleum Pipe industry Co., Ltd (abbreviated as BSG) is the only specialized modern pipe manufacturing enterprise of China National Petroleum Corporation. Founded in 1958, BSG is the "birthplace of welded pipes in China" and the first oil and gas pipeline manufacturer in China. The core business of BSG is pipe manufacturing and integrated line pipe, OCTG, coiled tubing, pipe coating, welded materials, new energy equipment and manufacturing services.
Website：http://bsg.cnpc.com.cn/