Hydrostatic pressure test is an indispensable link in the manufacturing process of steel pipes. Its function is to detect the anti-leakage function of steel pipes under standard test pressure and constant pressure time. It is the same as the flaw detection technology such as ray and ultrasonic, which is an important method to check the overall quality of the steel pipe. So what are the regulations for hydrostatic test of oil casing? Here is a brief introduction to everyone:

1. The hydrostatic test pressure of the pipe with coupling and thread is the lowest value of the hydrostatic test pressure of the flat end pipe, the maximum hydrostatic test pressure of the coupling, the leakage resistance of the internal pressure, but the maximum pressure of the guideline is 69MPa, and the calculated pressure The value is usually rounded to the nearest 0.5MPa.

2. According to API requirements, the hydrostatic test pressure measurement device should be calibrated within 4 months before each use.

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

4. The hydrostatic pressure test leakage is the evidence of rejection.

5. Unless otherwise agreed between the purchaser and the manufacturer, the coupling blank, coupling raw materials, adjacent raw materials or Q125 steel grade spools are not required to undergo hydrostatic pressure test