seamless carbon steel pipe ASTM A106 GR.B 1.Material:A106/A53/Q345B,Etc. 2. ... /2",3/4",11/2",3",4",6",8",10" ASTM A106 B steel pipe 1.Product Name: Seamless Steel Tube ... ability 2000~2500 Tons/month Delivery period 20~40 days ASTM A106 B steel pipe