... Seamless Pipes and Tubes ASTM1.seamless steel pipe ASTM A53 GR.B,Size:1/4"-36"2.High-temperature operation samless steel ... pipe ASTM A106 GR.B,Size:1/4"-36"3.Linepipe API 5L,Grade:B ... GR.B, B,1/4-28,13.7-711.2mm5.ASTM A179,A1926.-40°-101°ASTM A333,:GR.A,GR.1,GR.6,GR ... .7,GR.3,:1/4-28,13 ...