API 6AV2 pdf free download
API 6AV2 pdf free download.Installation, Maintenance, and Repair of Safety Valves (SSV, USV, and BSDV).
7 Testing Procedures 7.1 General The requirements for testing minimally include the following: a) Testing of safety valves shall be performed by qualifed personnel in accordance with the operator’s testing procedures. The operator’s testing procedures should consider feld experience, the safety valve manufacturer’s recommendations, governmental regulations, and the testing requirements of this standard. b) Pressure upstream of a safety valve should be stabilized. Stabilization is achieved when upstream pressure is not varying by more than 5 % or 3.45 MPa (500 psi) per hour, whichever is less, after the well is shut in. NOTE A stable pressure source upstream of the safety valve during the test is required to correctly interpret test results. For shut-in pressures at or below 4.13 MPa (600 psi), pressure shall be considered stabilized when the upstream pressure is not varying by more than 0.21 MPa (30 psi) per hour after the well is shut in. NOTE Upstream temperature variation impacts test results by afecting upstream pressure. By imposing stabilized conditions in upstream pressure prior to the start of the test, the efects of temperature variation are mitigated. For indirect measurement methods, the choked fow condition is primarily dependent on upstream pressure. c) Upstream conditions shall be stabilized in accordance with 7.1 b) when determining the sustained leak rate. d) Grease, lubricant, or sealant materials shall not be injected into the valve during pressure testing. e) Direct or indirect measurement methods can be used to evaluate the safety valve performance and compliance with test acceptance criteria.f) Records of the safety valve testing shall be maintained in accordance with Section 9 and shall identify the valve that was tested. The results of the test shall be documented using a method that compiles all of the information specified in Figure 2 for testing after installation/field repairs, and Figure 3 for periodic testing. For indirect measurement methods, properties being monitored such as pressure, temperature, and starting/ ending times, as well as related calculations, etc., shall be documented. g) If the rated working pressure of the valve downstream of the safety valve is not greater than the full wellhead SITP, the test shall be conducted without exceeding the working pressure of the downstream equipment. NOTE Typically, the frst isolation valve downstream of the safety valve will have a pressure rating comparable to that of the safety valve. 7.2 Periodic Operating/Pressure Holding Test 7.2.1 General Periodic testing of the safety valve shall be in conformance to the procedure outlined in 7.2.2. All requirements specifed in 7.1 shall be observed. The test results shall be documented on a Safety Valve Functional Test Data Sheet for Periodic Testing per the example shown in Figure 3. NOTE Closure time testing may be conducted as agreed between operator and repairer. Closure time testing is outside the scope of this standard.7.3.2 Testing 7.3.2.1 General Required tests for the safety valves following installation and/or feld repairs are stated below. The actual test procedure performed depends on the extent of repair and, as specifed below, may be limited to a reduced number of steps. API 6AV2 pdf download.
