The company has become the solely supply institute in domestic for seamless cold-drawn steel tube for gas cylinder appointed by the first level manufacture company of Beijing Tianhai Industry Co., Ltd,Tianjin Tianhai High-pressure Cylinder Co., Ltd, Langfang Tianhai High-pressure Cylinder Co., Ltd, Sinoma Science & Technology (Suzhou) Co., Ltd and Nantong CIMC Tank Equipment Co., Ltd. The company maintain good business cooperation and close technical communication with the first level tube trailer manufacture company of Luoyang Sunrui Special Equipment Co., Ltd, Luxi New Energy Equipment Group Co., Ltd, Xinxing Energy Equipment Co.,Ltd, Shijiazhuang Enric Gas Equipment Co., Ltd, Sinoma Science & Technology (Chengdu) Co., Ltd, NK Pressure Cylinder Technology(Shanghai) Co.,Ltd and EKC Industrise(Tianjin) Co.,Ltd. Product quality is in the leading position in the same industry in China.