... 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:Convey ... the gas, water ,and oil in petroleum and natural gas industries ... 2-25.4,DN50-200*3.2*25.44. Grade: B,X42,X46,X56,X65,X705. Techniques: hot rolled and ...