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Quality Control

At Hunan Jetvision Industrial Co.,Ltd, we take quality seriously. This philosophy carries through every aspect of our operation. That is why we maintain a fully documented/fully certified Quality Management System which complies with the requirements of ISO 9001. This quality system encompasses every phase of our business. 

1.Size & Appearance Inspection

On the product inspection table, symmetrical steel pipes should be measured in diameter and wall thickness one by one, and the quality of internal and external surface should be checked at the same time.


2.Chemical Inspection

Spectrometer analysis, belongs to the instrument automatic detection, more convenient and fast.

By manual reaction method, the content range of the detected elements is converted by comparing the values in the wavelength sensitive region.


3.Mechanical Inspection

Mechanical properties tests generally include tensile test, torsion test, compression test, impact test, hardness test, stress relaxation test, fatigue test, etc.


4.Non-destructive Testing(NDT)

Nondestructive testing includes five kinds of testing methods, including ray testing (RT), ultrasonic testing (UT), magnetic particle testing (MT), penetration testing (PT) and eddy current testing (ET).


5.Hydrostatic Pressure Inspection

The procedures and procedures of hydraulic test are as follows:

1)Connection.

2)Irrigation. Pure water should be used for pressure test water.

3)Inspection.

4)Boost pressure.

5)Pressure. No pressure drop and no leakage are qualified.

6)Work after pressure test.

6. Marking

We are marking on products according to customers request.


7. Final Inspection

Third Party Inspection for Products Visual and Dimensional Examination

In accordance with the referencing code requirements pipes is subjected to visual and dimensional examination by third party inspector. Particular attention is paid to the following points in the weld area.

1)Irregularity

2)Undercut

3)Overlap

4)Porosity and spatter

5)Slag inclusions

6)Cracks

7)It is also necessary the pipes to be free from dents, scrapes and handling damage.

Third Party Inspection for Products Marking

Full identification marks in accordance with the code requirements for the particular products sizes is checked by third party inspector.


Third Party Inspection for Products - Reporting:

Third party inspector provides Inspection Visit Report (IVR) after each visit as well as a final report summarizing the activities carried out during the products production in accordance with the contract requirements and circulated within the time limits specified in the contract.

The report is in the format required by the client and clearly indicates final acceptance or rejection of the product


Third Party Inspection for Products Release Note:

When required by the contract or purchase order a release note is issued by third party agency and given to the manufacturer when the products have been finally accepted.


Third Party Inspection for Products Packing, Marking and Shipping:

The following points are checked by third party inspector:

1) Verify that the packing materials conform to specifications and accepted practice for the mode of transport.

2) Verify protection against humidity, abrasion, distortion and other damage.

3) Verify shipping marks to marking instructions and record.

4) Verify handling marks.

Third Party Inspection for Products Documentation

All quality verification documents required by the code are reviewed for completeness and endorsed as necessary by third party inspector.