API 6A TYPE 6B 5000 PSI WELD NECK FLANGES

api5000API 5000, 10000 are used in reference to wellhead 'christmas tree' pressure ratings as well used for the wing valve, master valve ratings. There may be hher classes as’Obsolete’, ’discontinued’ or ’withdrawn’ API flanges have not been included in the above slide rule. Important note:- the above slide rule assumes ambient temperatures. Additionally, as