API 5LD pdf download CRA Clad or Lined Steel Pipe 5 Manufacturing of Clad and Lined Steel Pipe 5.1 General Clad pipe or lined steel pipe furnished to this specification shall be seamless or welded, as defined below. All welding consumables shall comply with the requirements of ASME BPVC Section II, Part C (2013.07.01). The thickness of the CRA layer...