What is hydrostatic test?
The hydrostatic test involves filling a piece of equipment with a fluid at test pressure and letting it sit for a certain amount of time to look for leaks. If the equipment withstands the test pressure without leaking, the test is considered successful.
A popular test method for pipeline components such pipes, valves, and fittings is the hydrostatic test.
The hydrostatic test is carried out by qualified professionals to check for leaks in pressure-containing equipment using chlorinated water (or other colored fluids). Before beginning a hydrostatic test, the personnel should be aware of the chemistry of the testing fluid and how it could affect the apparatus.
How to judge whether the hydrostatic test is qualified?
According to the requirement of related standard, NO leakage or pressure dropping was founded during the hydrostatic test. All the pipes are hydrostatic test qualified.
Hydrostatic test value
It accords to the standard, such as API 5L
Hydrostatic test pressure, P, expressed in megapascals (pounds per square inch), for plain-end pipe shall be determined using Equation, with the results rounded to the nearest 0.1 MPa (10 psi):
P=2*S*t/D
where
“S” is the hoop stress, expressed in megapascals (pounds per square inch), equal to a percentage of the specified minimum yield strength of the pipe;
“t” is the specified wall thickness, expressed in millimeters (inches);
“D” is the specified outside diameter, expressed in millimeters (inches).
Hydrostatic test video
The video shows how the test is executed and the result is passed.
