... -60mm 3. Steel Grade:A53 (A,B),A106(A,B),API 5L Gr.B,X42,X52,X60,st42,st37,st52,SS400,SS490 ... Certificate:API 5L ,API 5CT,ISO 10. Inspection: BV,SGS,IBR (Charge needing discuss) 11. welcome your visit to our warehouses about bare pipes ... and finishedproduct before comfirm order. 12 welcome min order. (about 2 tons) ASTM A53/A106/API 5L Gr.b ...