ASTM A53/A106/API 5L Gr.b seamless steel pipe 1.Standard:ASTM,API,DIN,GOST 2.Grade:A53,A106,API 5L Gr.B 3.Size:1 ... /2-20inch ASTM A53/A106/API 5L Gr.b seamless steel pipe Product Introduction: 1. Kind: carbon steel seamless pipe 2. Size: Diameter: 1/2 inch ... .65 P:≤0.035 S:≤0.035 9. Production Certificate:API 5L ,API 5CT,ISO 10. Inspection: BV,SGS,IBR (Charge needing discuss ...