Established in 1993, CANGZHOU AOLONG is located in Cangzhou Hebei Prov, with only 2 hours' drive to Beijing and 1 hour's drive to Port Tianjin. CANGZHOU AOLONG STEEL PIPE CO.,LTD.(formerly HEBEI GONGYUAN PIPE MUNUFACTURE CO., LTD.), our pipe plant, mainly manufactures seamless steel pipe, galvanized steel pipe, ERW steel pipe and hot expansion steel pipe. As the owner of ISO 9001 Quality System Authentification, API 5L and API 5CT certificates, we can produce steel ...