What is the inspection standard for stainless steel electric heating pipes?

- Jul 17, 2019-

At present, the existence of many advanced technology products in the society not only provides effective help for industrial production, but also brings profits to manufacturers. Stainless steel electric heating coil is one of them, then what is its inspection standard? What else should I pay attention to during the inspection? Please see the details below.


The inspection standards for stainless steel electric heating coils are as follows:


First, the pressure test


It is to apply AC or DC voltage between the charged and uncharged places of the electrical appliances, mainly to check the withstand voltage capability of the electrical insulation materials. This test is mainly to measure the breakdown resistance of the electrical insulation of the electrical appliance, and also to check whether the manufacture of the product is safe and reliable.


Because the electrical equipment works for a long time, it is not only able to accept the extra voltage effect, but also accept the over-voltage effect of the short-time operation higher than the rated voltage. Under this action, the internal structure of the electrical insulation of the electrical appliance will change. When the specified value of the strength is reached, the insulation will be broken, resulting in the failure of the appliance to operate properly, which may also endanger the operator's personal safety.




The capacity of the transformer selected for the experiment should be appropriate and generally selected according to the product being tested.


Second, the dielectric breakdown test


Conventionally, the breakdown voltage is related to the thickness of the material. The thicker the thickness, the higher the breakdown voltage. If the equipment is used in a low-humidity area, the full voltage will increase or increase slightly with temperature. If it is working at high temperature, it will decrease exponentially with increasing temperature, humidity will increase, and moisture will be absorbed inside and outside the material. It will increase, usually causing the breakdown voltage to drop.