ASTM A53 hot dipped galvanized steel pipe-high quality 1.Wall Thickness:0.5-12.0mm 2.Model number:1/2"-8" 3.O.D.:19-325mm Specifications:1.Standard:BS1387,BS EN10217;JIS G3461-2005,JIS G3463-2006;ASTM A106-2006,ASTM A53-2007API 5L.2.Material Quality:Q195,Q215,Q235,Q345;10#,20#,45#;A53(A,B),A250;16Mn.3.Certifications:ISO,GOST,DNV,PED.Features:1.Type:ERW.2.Model number:1/2"-8".3.Quter diameter:19- ...