1.OD:1/2"-48" 2.WT:SCH5-SCHXXS 3.Material:A234WPB,304,Q235 and so on 4.Standard:GB, ... ,Gost17375MateriaCarbon steel: ASTM A234 GR WPB , ST37.2 , ST35.8……Alloy steel: A234 WP5/WP9/WP11/WP22/WP91, A420 WPL6, A860 ... &CFR, CIFPAYMENTTT or L/CCERTIFICATESGB/T19001-2008-ISO 9001:2008 seamless pipe fitting elbow a234 wpb sch40,80,xs,xxs