The Company invested 120 million yuan and 50 million yuan respectively to introduce domestic advanced high frequency welding square and rectangle pipes production line and straight seam submerged arc welding pipes production line.<br /> Our products:ERW square and rectangular tube,JCOE large diameter round steel pipes.They are used in construction and low pressure fluid,such as oil and gas pipes.<br /> We have our own patent and utility patents, namely, feed roller device of a welder,a multiply caliber roundness correction unit,a submerged arc welding pipe butt joint device , a high-frequency welder squeeze roller adjusting drive set ,a milling machine automatic pin ,a production line of cold-formed steel shearing butt centering device .<br /><br />