... pipe galvanized pipe, seamless steel pipe spiral steel pipe alloy pipe StandardASTM A106 GRB/API5LGRB/ASTMA53GRB DIN ANSI GB SH HG APIMaterialGRB20#STEEL,A3,A234,ASTM ... , Machinery, Traffic, Aviation, Oil development, etcOD ToleranceD<48.3mm,+-0.4mm/-0.79mm,D48.3-114.3mm,+-0.79%,D>114 ...