API 6D pdf download

API 6D pdf download.Petro leum and natural gas industries— Pipeline transp ortation systems—Pipeline valves 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply: 3.1 ANSI rating class numerical pressure design class defined in ASME B1 6.5 and used for reference purposes NOTE The ANSI rating class is designated by the word “Class”...