API 5000What does it refer to? 1

api5000API 6B API 5000 (Class 1500) 1-1316″ to 26-34 Pressure Class API 2000 (Class 600) API 3000 (Class 900) s Material Class BB Raised Faced& CC DD & EE Bolts Holes 4 to 48 Face RingAPI 6A Type 6B 5000 PSI Weld Neck Flanges are generally used in hh pressure applications, where hot or cold temperatures exist. These steel API 6A weld neck flanges