What is the validity period of the domestic explosion-proof certificate?

End users of explosion-proof electrical products often face such problems.

In fact, the explosion-proof certificate has a validity period. Currently, the validity period of domestic explosion-proof certificates is generally5Year.

Each certificate holder will clearly see the validity period of the certificate on the certificate.

The explosion-proof certificate can be changed and extended during its validity period.

Change of Explosion proof Certificate

If there are errors in the content of the explosion-proof certificate, it should be changed in a timely manner. For changes in the unit address and the original manufacturing unit name, the change procedures and application letter should be presented for the change.

Renewal of Explosion proof Certificate

When the expiration date of an enterprise's explosion-proof certificate is approaching, the enterprise should provide an application letter for certificate renewal within three months before and after the expiration date, and should bring the following information to apply for certificate renewal again. If there are any unexpected situations, please notify our center in a timely manner. The application letter includes the product name, model, original explosion-proof level, original explosion-proof certificate number, and an explanation of whether the product has been changed. The enterprise should also send the expired explosion-proof certificate and the inspected technical data toZhongnuo TestingRe examine and provide samples for retesting.