Pipeline pipes Pipeline pipes BradSmith (Mechanical) (OP) 21 Mar 14 12:16 Hello, I have a question: which grade of API 5L pipes chose for pipeline works? and why? I've heard that API 5L grade B does not applicable in pipelines, is this expression true? RE: Pipeline pipes DSB123 (Mechanical) 25 Mar 14 08:17 BradSmith, It's not policy to double post questions. Select the forum most appropriate and aske the question there ONLY. RE: Pipeline pipes BradSmith (Mechanical) (OP) 29 Mar 14 11:28 Sorry, I think this website has bug. Because I've post this question about one week ago.