API 6A Ball Valve testing API 6A Ball Valve testing Miejot (Mechanical) (OP) 17 Oct 16 15:24 Hye, I would like to know how to determine a ball valve 10k psi shell test,and seat test pressure as per API 6A. Where could i find in API 6A since it only mentioned gate valve. RE: API 6A Ball Valve testing DamianThorn (Mechanical) 26 Oct 16 16:55 Hi Miejot, Replace the word gate for ball and follow the same sections for testing. That is the common practice for valve manufacturers producing ball valves to API 6A standard. I have worked for numerous years for a HPHT subsea ball valve specialist and for an EPC delivering valves from alternate vendors and they all word their test documentation this way.