seamless carbon steel pipe ASTM A106 GR.B 1.Material:A106/A53/Q345B,Etc. 2.Size:1/2",3/4",11/2 ... ",3",4",6",8",10" ASTM A106 B steel pipe 1 ... : China3.Application: Seamless steel tubes for equipment, pipelines, vessels, pipe fittingsand mechanical Structures.4.Grade: 10,20,35,45,Q345 ... ability 2000~2500 Tons/month Delivery period 20~40 days ASTM A106 B steel pipe