Periodic inspection and requalification - High pressure steel cylinders for the on - Board storage of compressed natural gas as a fuel for automotive vehicles, cylinders for hcng blends and cng cascade cylinders - Code of practice
Non-Destructive Testing of Steel Tubes Part 2 Automated Eddy Current Testing of Seamless and Welded ( Except Submerged Arc-Welded ) Steel Tubes for the Detection of imperfections ( Second Revision )