astm a106b seamless carbon steel pipe 1.Thickness:2mm-45mm 2.21.3mm-406.4mm(1/2"-16") astm a106b seamless carbon steel pipe 1.Standard: ASTM A106, ASTM A53, DIN 17175, GB8162, GB30872.Grade: A106B, A53B, St35.8, St45.8, St52, 20#, 45#, 10#, Q345B3.Thickness: 2-45mm4.Diameter:21.3-406.4mm5.Thickness tolerance:+/-0.05mm6.Diameter:+/-0.1mm7.Length:7-9 meter, or according to customer's requirement8. ...