... :1/2-20inch ASTM A53/A106/API 5L Gr.b seamless steel pipe Product Introduction: 1. Kind: carbon steel seamless ... Grade:A53 (A,B),A106(A,B),API 5L Gr.B,X42,X52,X60,st42,st37,st52,SS400,SS490 4 ... ( 2inch to10 inch) 5. Pakages: black painting,beveled end,pipe cap,marking,bundles,wowen bag. 6. Tolerance:According to the ... 0.35-0.65 P:≤0.035 S:≤0.035 9. Production Certificate:API 5L ,API 5CT,ISO 10. Inspection ...