... 2.Wellhead and well control equipments test standards, such as API 16A, API 16C, API 6A and SY5156. 1. Test objectsThe Gas Proof Test ... standards Wellhead and well control equipments test standards, such as API 16A, API 16C, API 6A and SY5156. 3. Main parametersItemTechnical IndexesModelGTB -105, 140 ...