Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
Sample Requirements for Explosion-Proof Certification Application:
The sample machines submitted by the company for inspection should match the approved drawings and be fully assembled; the number of inspections should meet the requirements.
If special disassembly tools are required, they should be sent along as well.
For potting-type electrical equipment, a set of both potted and unpotted products should be submitted.
The observation window transparent parts should be supplied separately with at least 3 pieces, additional 5 pieces.
The transparent parts of the lighting fixtures should be sent separately in at least 5 pieces, with an additional 8.
Rubber aging tests should provide 3 to 5 pieces of 35156 rubber blocks.
Insulation resistance testing of plastic enclosures requires two plastic sheets with a diameter of 15-60mm. If the size permits, the testing can be directly performed on the plastic enclosure.
1-2 finished products are generally required.

What is the relationship between the explosion-proof certificate and the explosion-proof CCC certification?
The explosion-proof certificate and the explosion-proof 3C certification are for different types of explosion-proof products.
Explosion-proof 3C Certification is applicable to products listed in the Explosion-proof 3C Catalog. There is a dedicated product catalog for explosion-proof 3C. Products within this catalog require the acquisition of explosion-proof 3C certification. The process involves both "product testing" and "factory audit," encompassing both type testing of the product and on-site factory evaluation.
Ex-proof Certificate is applicable to products not listed in the Ex-proof 3C Catalog. The certification model involves product testing; upon passing the product testing, an Ex-proof Certificate can be issued frequently.
Of course, products outside the explosion-proof 3C catalog can also apply for explosion-proof certificates alone, but there's a risk of being penalized by market supervision. This is something for the customer to consider on their own.

Certification standards for explosion-proof equipment used in explosive gas environments:
GB/T 3836.1-2021 Explosive Atmospheres Part 1: Equipment General Requirements
GB/T 3836.2-2021 Explosive Atmospheres – Part 2: Equipment protected by a flameproof "d" enclosure
GB/T 3836.3-2021 Explosive Atmospheres, Part 3: Equipment protected by an "e" protection type
GB/T 3836.4-2021 Explosive Atmospheres – Part 4: Equipment protected by intrinsic safety “i”
GB/T 3836.5-2021 Explosive Atmospheres, Part 5: Equipment protected by positive pressure enclosures “p”
GB/T 3836.6-2017 Explosion-proof environment — Part 6: Equipment protected by liquid immersion type “o”
GB/T 3836.7-2017 Explosive Atmospheres, Part 7: Equipment protected by sand-filled "q" type
GB/T 3836.8-2021 Explosive Atmospheres Part 8: Equipment protected by "n" type protection
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type encapsulation

What is a Security Explosion Proof Certificate? What are the requirements for applying for a Security Explosion Proof Certificate?
Safety-certified equipment primarily achieves explosion-proof standards by controlling the electrical parameters of the equipment's circuit and limiting the total circuit energy.
Key measures include reducing voltage and current, and controlling parameters of energy storage components such as inductors and capacitors.
The product design reference standards are GB/T3836.1 and GB/T3836.4.
Customers applying for explosion-proof certification need to provide electrical schematics, block diagrams, PCB layouts, and tag number diagrams.
Product assembly drawings, manuals, corporate standards, and other documentation.
Recently, we have obtained temperature vibration sensors, remote transmitters, monitoring devices, and Bluetooth beacons for our customer.
The explosion-proof certificates for walkie-talkies and other products are all of intrinsic safety type explosion-proof design.
If you also have products requiring explosion-proof certification, feel free to send us a private message!
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.