... ) ISO9001,API 2)OD:60.3-219.1*3.2-25.4,DN50-200*3.2*25.4 3) B,X42,X52,X60 4) length ... :2-12m API 5L gr B,API 5L B ... /T9711.23. Sepecification:Φ60.3-219.1*3.2-25.4,DN50-200*3.2*25.44. Grade: B,X42,X46,X56,X65,X705 ... 's require.7. ERW,SSAW,Seamless steel pipe API 5L B,X42 line pipe