... pipes,from the material picking,rolling,striping,pipe making,polishing,and package all these procession. 3.Certification:ISO 9001:2008,ISO 14001 ... . 10.Product Size: Round pipe:O.D.:9.5,12.7,15.9,17,18,19.1,20,21,22 ... ,18*18,19*19,20*20,22*22,23*11,24*12,24*24,25*25,28*28,30*30,23 ... *150 etc.Thickness:0.25 to 3mmLength:3000mm to 8000mm 11.Sales Market:Southeast Asia ,South America, Western Europe, Southern ...