Detailed Product Description Carbon Steel Seamless Pipes and Tubes ASTM1.seamless steel pipe ASTM A53 GR.B,Size:1/4"-36" ... ASTM A106 GR.B,Size:1/4"-36"3.Linepipe API 5L,Grade:B,X42,X46,X52,X56,X60,X65,X70,X80 ... ,Size:1/4-284.ASTM A106/A53/API 5L GR.B, B,1/4-28,13.7-711.2mm5 ...