Competing with multiple explosion-proof manufacturers

Explosion-proof equipment manufacturers vary by site.

Inability to determine explosion-proof suitability of equipment due to lack of explosion-proof knowledge

In case of suspicion, directly contact the explosion-proof certification agency to inquire about explosion-proof certification

Is the submitted explosion-proof certificate a properly issued certificate?

Is the delivered explosion-proof equipment manufactured according to the certified drawings?

Has the delivered explosion-proof equipment been properly tested?

Who is responsible if a problem occurs with the installed explosion-proof equipment?

A large number of defective products are discovered each year during inspections of manufacturer products.

Limitations of collection testing (limited product sampling)

Mass production of products different from the certified drawings (cost reduction and delivery)

Mass production by arbitrarily modifying the product to be different from the sample submitted when obtaining explosion-proof certification (since the current explosion-proof certification system is a sample certification system, this is exploited)

Absence of a quality management system based on profit-seeking and delivery schedule (failure to conduct verification tests, etc.)

How to filter supplied products: Only check explosion-proof certificates

In case of non-conforming products, all existing installed products must be replaced -> production facilities must be stopped.