Api Gate Valve Testing Procedure

There are two types of sealing performance test for gate valve. Valve inspection and testing 1 general 1 1 scope 1 1 1 this standard covers inspection examination supple mentary examinations and pressure test requirements for resilient seated nonmetallic seated e g ceramic and metal to metal seated valves of the gate globe plug ball check and butterﬂy types. Valve inspection and testing covers the testing and inspection requirements for gate globe check ball plug and butterfly valves.

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The valve inlet and outlet are closed off with flanges.

Api gate valve testing procedure. Resilient seats are considered to. 5 gate globe check valves gate valves design standards test inspection methods acceptance criteria test inspectionbolted bonnet gate valve api 600 iso 10434 asme b16 34 pressure seal gate valve long short pattern visual inspectionasme b16 34 api 603 gate valve api 603 api 6dthrough conduit gate valve. The valve is adjusted until the ball disc is in a half open position. The valve is filled with dry clean and oil free nitrogen or air through the.

In both cases seat leakage tests are performed on factory new valves with the stem vertical and the maximum handwheel torque applied with measurable leakage allowed at the test pressures involved. The sequence of tests to be performed and have provided a more detailed procedure for each test. Open the gate plate so that the pressure inside the valve rises to the specified value. Then close the gate plate and immediately remove the gate valve to check whether there s leakage at the.

The strength test of gate valve is the same as that of sanitary shut off valve. This content is general and can be useful even if the design code is different from the api code. The third party inspection for valve article provides you with a sample valve inspection and valve testing procedure in the manufacturing shop. The steel valves are designed and built in accordance with american petroleum institute api 600 and tested per the applicable sections of api 598.

The valve shell test or body test is conducted based on the valve manufacturer approved test procedure. All valves built to the various api standards are required to meet api 598 leakage criteria prior to shipment from the. Api 598 valve inspection testing. The api standard 598.

It has acceptable leakage rates for liquid as well as gas testing. It is particularly suitable for the inspection of gate globe ball and check valves. To metal seated valves of the following type gate. This test is optional depending on size class type but on api 608 valves and api 600 gate valves it is always performed by gsl.

The most valve manufacturers standard procedures are driven by the requirements of api 598 valve inspection and testing and asme b16 34 valves flanged threaded and welding end the valve is mounted on the test bench and shall be.