Falsification of quality certificate
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Has anyone come across cases of fake quality certificates? How can we prevent and detect such frauds, especially in the case of heat exchange tubes? I’ve heard that there are many instances of fraud in this area; let’s discuss it.
I’ve heard of it, but I haven’t paid attention to it. Check the color and wall thickness, take samples for chemical composition analysis and mechanical property testing?
There is no good way to solve this; it is a matter of corporate integrity. To ensure good quality control, on-site supervision during production is the only option.
Buy an alloy analyzer to perform spectroscopy
I can only tell you that product quality certificates are (relatively) credible in organizations where quality systems are strictly implemented, but in organizations with dysfunctional quality systems, such certificates are nothing but worthless paper meant to deceive honest people.
One is to find companies with a good credit rating, and the other is to use a third party to conduct sampling tests and obtain test reports
If there are concerns that the manufacturer’s quality certificates are fake, it is possible to retest the raw materials supplied by the manufacturer; for example, physical and chemical property analyses of the materials can be conducted. If that doesn’t work, a equipment supervision agency can be hired to oversee the manufacturing process.
Recheck it; not to mention ordinary manufacturers, even large companies sometimes produce materials with issues. However, large companies will actively address any issues they encounter, which is something smaller companies may not be able to do.
Check the quality certificate and the quality inspection report