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.
The process for applying for an explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Conduct product evaluation and provide an initial quote for the applied products. Evaluate the product based on the company's product specifications, electrical schematics, and component list. Determine the suitable type of explosion-proof certification for the product and offer an initial quote.
2. Offer samples for laboratory testing; the quantity of samples required varies depending on the product category.
3. Provide documentation list review
Application materials, including applicant's information.
(2) Technical documents, including the submitted technical materials by the company, such as corporate standards or technical requirements, product drawings, user manuals, etc.
A. Corporate Standards/Technical Requirements: The corporate standards/technical requirements for products should be written in the prescribed format, including not only the performance requirements of the product but also relevant content regarding explosion-proof aspects: such as basic parameters, explosion-proof markings, operating environmental conditions, explosion-proof performance requirements, relevant tests for explosion-proof performance, and markings related to explosion-proof.
B. Product Drawings: When applying for a防爆 certification for intrinsically safe electrical equipment, the applicant should provide assembly drawings, circuit diagrams, printed circuit board drawings, silk-screen drawings, component material lists, and label drawings, etc. For non-intrinsically safe electrical equipment, the technical documents submitted for inspection should include drawings that reflect the sample's explosion-proof performance (including assembly drawings and component drawings). If the assembly drawing clearly indicates the product's explosion-proof parameters and structure, only the assembly drawing needs to be submitted for inspection.
C. Instruction Manual - The instruction manual should include basic parameters, explosion-proof markings, product外形 diagrams, installation, maintenance, order instructions, and explicit warnings to the user regarding the importance of ensuring the product's explosion-proof performance during installation and use.
D. Additional Information: For products with adhesive bonding or casting, provide the model names, performance descriptions, and relevant process documents for the adhesive and casting agents. For plastic enclosures, provide the material of the plastic and corresponding performance documents.
4. Certificate Issuance

Flammable Dust Environment Explosion Proof Certification Standard:
GB/T 3836.1-2021 Explosive Atmospheres – Part 1: Equipment – General Requirements
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 enclosure "p"
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by "m" type enclosures
GB/T 3836.31-2021 Explosion-Proof Environment, Part 31: Equipment protected by dust-protection enclosures "t"

The cost of obtaining explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd. is related to the following aspects:
1. Do you need an explosion-proof certificate or an explosion-proof 3C certification? For the 3C certification, a factory audit is required, which includes the audit fee, travel expenses for the auditor, the application fee for the 3C certificate, and the certificate fee.
2. Related to explosion-proof markings. Different explosion-proof markings correspond to different explosion-proof items, and naturally, the costs vary accordingly.
3. Domestic explosion-proof certification or international explosion-proof certification? The same explosion-proof mark, ATEX/IECEx certification is much more expensive than the domestic explosion-proof certificate, and it also requires factory audit. North American explosion-proof certification is even more expensive, over $100,000+
4. Do you need a retest? Some customers' products haven't undergone explosion-proof design at all. Bringing them in for a整改 adds extra costs. If the product includes a battery, battery testing is also a cost, especially for those batteries that frequently fail the tests.
5. Necessary? Labs are often booked solid, and there's often a waiting list. If needed, there will be a fee involved.

Explosion-proof Certification Categories -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
Electrical equipment for explosive gas atmospheres:
Explosion-proof type d
Safety Increased Type e
(3) Intrinsically Safe i
Positive Pressure Type P
(5) Immersion Type
(S6) Sand-filled type q
(7) Molding Sealing
(8) N-type
2. Electrical Equipment for Combustible Dust Environments
Dust-Proof Ignition-Resistant Housing
(2) Positive Pressure Type
(3) Intrinsically Safe
(4) Casting Sealed
3. Explosion-proof Type S
4. Composite:防爆型式 that combines two or more of the above-mentioned types
Explosion Proof Certification Application Consultation Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.