API 5L grade B X42 1) 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,X42Pipeline/ line tube/pipeline tube/line pipe1. Application ... GB/T9711.1GB/T9711.23. Sepecification:Φ60.3-219.1*3.2-25.4,DN50-200*3.2*25.44 ... . Grade: B,X42,X46,X56,X65,X705. Techniques: hot rolled and ...