As we all know, square and rectangular tubes are formed and rolled from round tubes. We can make square and rectangular tubes that conform to European standards EN10210 and EN10219, which means that our circular tube products must also conform to the certification standards of European standards EN10219 and EN10210. In fact, customers have come to us to purchase round steel pipes for a long time, and all the performance parameters of our products are up to standard, especially the quality of welding seams, which is several grades higher than ordinary manufacturers. The addition of EN10219 certification of round pipes has enriched our product inspection and certification standard system. It also makes the customers who are going to purchase round pipes more confident and reassured, because your products have another layer of product quality assurance.