api 5000Over two days and 500 plasma sample injections, the API 5000™ system demonstrates excellent reproducibility and stability for the response of the compound and internal standard. =*Tolerances and ring gaskets are according to API 6A. Materials for API 6A Type 6B 5000 psi(34.5 MPa) Weld Neck RTJ Flange, API 6A 6B Weld Neck