Tianjin Tianfeng Steel Pipe Co., Ltd. is a large enterprise in producing various steel tubes, such as square pipes, rectangular steel tubes and specially shaped pipes. We are specialized in ERW steel pipes, spiral submerged arc-welded steel pipes and a variety of hot rolling stripes. Our products cover major domestic and foreign markets. We have advanced technology, fine equipment, strong technical force, and excellent after sales service, which make us gain the acceptance and high praise. We are sincerely cooperating with customers at home and abroad. Our main products are square pipes, rectangular steel tubes and circle steel pipes and we can produce all kinds of specially shaped pipes. Production Technology: High frequency welding Production Quality: Follow the standards of GB/T13793-92, GB6728-88 and in accordance with Japan JISG3445, G3446 standards. Applied Range: Construction, bridge,