This is the dominant product of our company which is mainly applied as container or bearing pipe in oil refining, fine chemical industry, cold air [LNG, air separation unit, etc.], paper-making and shipbuilding areas. The largest diameter could be 3000mm, with the wall thickest can be 80mm and length can be 12m per piece. We use the advanced JCOE flexible forming technology together with automatic welding controlled by computer, which can do both-side or single-side welding accordingly. After welding the pipes will receive X-ray inspection to guarantee a perfect appearance and quality.