PRODUCT Huike Steel pipe Co., Ltd. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes. Oil line pipeLine pipes include seamless pipes and welded steel pipes.