api 5000API 6A flanges of class 5000 and below are often made of A105 carbon steel with a minimum yield strength of 45K, while API 6BX flanges of class 10000The API 5000 system uses the Turbo V™ ion source to produce ions from liquid samples. The Turbo V source can use either the TIS (TurboIonSpray®) probe or the.