This International Standard is based on ISO 14313. It has been developed to address special requirements specific to subsea pipeline valves. It specifies requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for subsea application in offshore pipeline systems meeting the requirements of ISO 13623 for the petroleum and natural gas industries.
11.3 Operational/functional test ...
11.3.1 Manual valves .. Valves requiring input forces exceeding that specified in 7.20.1, or that fail to seal after operation, shall be rejected
11.3.2 Power-operated/actuated valves ..The valve shall be operated for each appropriate condition defined in 126.96.36.199 and 188.8.131.52 and the thrust or torque shall be measured. Valves requiring thrust or torque exceeding the predicted manual or power values specified in 7.20.1, or that fail to seal after operation, shall be rejected.
11.3.3 Check valves .. Each check valve fitted with an operating mechanism shall be operated (close-open-close) five times while the entire body cavity is subjected to the rated pressure listed in 7.2. Valves that fail to operate, fail to seal after cycling or require torque exceeding the predicted manual or power values specified in 7.20.1.shall be rejected.