... )Payment: T/T,L/C or negotiable ASTMA53/A106 Gr.B carbon seamless steel pipe Our main products.Carbon SteelASTM/ASME ... A 53 GR. A & B , ASTM A 106 GR. A , B & C .API 5L GR. B, API 5L X 42 / X ... zone, central north road, Tanggu , Tianjin , China ASTMA53/A106 Gr.B carbon seamless steel pipe