What are the requirements for hydrostatic test of oil casing

Hydrostatic test is an indispensable link in the manufacturing process of steel pipe. Its function is to detect the anti-leakage function of steel pipe under the standard test pressure and constant pressure. It is the same as X-ray, ultrasonic and other flaw detection technology, and it is an important means to check the overall quality of steel pipe. So what are the rules for hydrostatic test of oil casing? Here's a simple way to popularize them.

 

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 and the internal pressure leakage resistance, but the maximum pressure of the criterion is 69MPa, and the calculated pressure is usually rounded to the nearest 0.5 MPa.

 

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

 

3. If customers have unique requirements, they can choose higher hydraulic test pressure.

 

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

 

5. No hydrostatic test is required for the blank of the coupling, the raw material of the coupling, the adjacent raw material or the Q125 steel grade short section, unless the buyer and the manufacturer have other treaties.

 

This is the regulation of hydrostatic test for oil casing. Welcome to consult and purchase.