API 5CT Hydrostatic Test Of Oil Casing

The hydrostatic test of API 5CT oil casing is to test the pipe under a specified pressure when it is filled with water to see whether leakage or rupture will occur. It is used to detect the leakage resistance of the steel pipe under standard test pressure and pressure stabilization time. It is a steel pipe An integral part of the manufacturing process. The operation includes three steps: flushing, pressure testing, and water control. Today, we will introduce in detail the hydrostatic test of API 5CT oil casing.

The oil casing hydraulic testing machine can be used to test the pressure resistance performance of oil casing. It is pressurized in the form of a pressurized cylinder. The pressurized form is fast, stable and reliable. Equipped with automatic control technology to display water pressure curve, input and output test statistics, and storage test statistics.

Key Points For Later Technical Operations:

1. Parameter setting: Set the test pressure value and pressure stabilization time according to the specifications, steel grade, and thread type of the pipe under test;

2. Hydrostatically test the entire length of each pipe. The actual test pressure and minimum pressure stabilization time must comply with the regulations of the process card (sometimes the pressure stabilization time is appropriately adjusted according to the quality of raw materials);

3. When testing pressure, check whether the seal is intact and leaking at any time;

4. The pipeline test pressure control range is:≥standard hydraulic test pressure;

Precautions For Later Operations:

1. When the actual hydraulic test pressure cannot reach the standard pressure due to equipment reasons, the technical department should be notified in time to make corresponding process adjustments.

2. If the pressure stabilization effect is not good during the pressure test, check whether there are leaks in the seals and pipelines, and repair them if necessary.

3. After the pressure test, pay attention to check whether there is any knocking on the pipe body.

API 5CT Standard Hydrostatic Pressure Test Related Regulations:

1. The hydraulic test pressure value of pipes with couplings and threads is the lowest value of the hydraulic test pressure of flat-head pipes, the maximum hydraulic test pressure of couplings, and the internal pressure leakage resistance, but the standard maximum pressure is 69MPa. Calculated pressure values are generally rounded to the nearest 0.5MPa.

2. According to API requirements, hydrostatic test pressure measuring devices should be calibrated within 4 months before each use.

3. If the customer has special requirements, a higher hydraulic test pressure can be selected.

4. Leakage in hydrostatic pressure test is the basis for rejection.

5. Unless otherwise agreed between the supplier and the buyer, coupling blanks, coupling materials, adjacent materials or Q125 steel grade taps do not need to undergo hydrostatic testing.