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.
Certification standards for explosion-proof equipment used in environments with explosive gas:
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 enclosure "d"
GB/T 3836.3-2021 Explosive Atmospheres, Part 3: Equipment protected by an "e" type of increased safety
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 an "p" positive pressure enclosure
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 filling with sand, type “q”
GB/T 3836.8-2021 Explosive Atmospheres, Part 8: Equipment protected by "n" type of protection
GB/T 3836.9-2021 Explosive Atmospheres, Part 9: Equipment protected by cast-in "m" type enclosures

To obtain the ATEX certification, a series of documents must be prepared, including product manuals, company standards, electrical schematics, block diagrams, PCB layouts, assembly drawings, battery specifications (if applicable), casting and sealing process documents (if applicable), wireless transmission power reports (if applicable), and material reports for the casing (if applicable).

Safety explosion-proof certification application注意事项及资料流程
Please note the following points when applying for an explosion-proof certification:
1. Product Explosion-Proof Mark: First, we need to determine the product's explosion-proof mark, which is the target explosion-proof level for product assessment. If not yet determined, please provide us with the product's usage location, installation method, or product manual so we can initially assess the explosion-proof mark for you.
2. Product整改Support: During the process of applying for the explosion-proof certification, if the product is still in the design phase or requires modifications based on the existing standard product, we offer comprehensive technical guidance and assistance in compiling certification documents to ensure a time and effort-efficient acquisition of the explosion-proof certification.
3. Sample and Technical Drawing: To obtain the explosion-proof certification, samples of the product and complete technical drawing documentation are required. If you are the designer or manufacturer, this should be relatively straightforward; however, if you are a buyer or user, additional effort may be needed to prepare this documentation.
4. Evidence Collection Cycle: Determine if it's necessary to proceed, and identify any targeted evidence collection dates.
5. Required Documents:
(1) Product manual and enterprise standard
Design Drawings and Documents
(3) Samples and Sample Blocks (provided according to specific requirements)
6. Application Process:
Gather and organize the required drawings and technical documents mentioned above.
(2) Preliminary evaluation and determination of the certification plan
(3) Both parties have reached an agreement to cooperate and signed the contract.
(4) Shenzhen ZN Testing will conduct a technical evaluation of your product to ensure that the product and drawings meet the explosion-proof standard requirements.
(5) Arrange sample testing or on-site testing
(6) Explosion-proof Test Report and Draft Certificate
(7) Issue Explosion-Proof Certificate.
Additionally, the process for obtaining the whole machine explosion-proof certificate requires that all electrical components be purchased and installed with explosion-proof certifications, such as solenoid valves, control buttons, control cabinets, and various sensors on the equipment, all of which must have an explosion-proof certification. Moreover, the installation methods of each component must comply with the requirements of GB/T 3836.15-2017 "Explosive Atmospheres - Part 15: Design, Selection, and Installation of Electrical Equipment."
It's worth noting that there are several institutions in China that can issue explosion-proof certification, and the certificates from these institutions have equal validity. Should you require more specific procedures or have any questions, please feel free to contact us at any time. We are committed to providing you with excellent service and support.
If you need to obtain an explosion-proof certification and would like to learn more about the services provided by Shenzhen ZhongNuo Testing Technology Co., Ltd., such as explosion-proof design, circuit modifications, and other consultations, as well as full-process agency services for applying for the explosion-proof certification, please feel free to inquire at any time.

Ex-proof certificates and Ex-proof 3C certifications are two different certification requirements for explosion-proof products. The main differences between them are reflected in the following aspects:
I. Applicable Product Range:
Ex-proof Certificate: Applicable to all explosion-proof electrical and non-electrical products, regardless of whether they are listed in the explosion-proof 3C certification catalog.
Explosion-proof 3C Certification: Specifically refers to products listed in the explosion-proof 3C Certification Catalog, such as motors, fans, walkie-talkies, etc. If these products have already obtained an explosion-proof qualification certificate, they need to be converted to an explosion-proof 3C certification.
Section 2: Certification Methods:
Ex-proof Certificate: Mainly confirms the product's compliance with relevant standards through product testing for its explosion-proof performance.
Explosion-proof 3C Certification: Adopting the "Product Testing + Factory Audit" approach, it not only requires the product itself to meet explosion-proof standards but also demands that the applicant's manufacturing facility or OEM/ODM factory comply with certain quality management systems and production conditions, necessitating annual supervision and audits.
Section 3: Certification Bodies and Standards:
Ex-proof Certificate: Issued by a third-party testing institution with the appropriate qualifications, based on relevant standards for explosion-proof products.
Explosion-proof 3C Certification: Managed uniformly by the China Certification and Accreditation Administration (CNCA), with designated certification bodies authorized to issue it. The specified testing laboratories conduct relevant tests, adhering to the mandatory product certification standards (i.e., the 3C standards) and related explosion-proof product standards.
IV. Market Access Requirements:
Ex-proof Certificate: It is one of the basic requirements for ex-proof products to enter the market, but not all ex-proof products require 3C certification.
Explosion-proof 3C Certification: Obtaining an explosion-proof 3C certification is a mandatory requirement for products listed in the explosion-proof 3C certification catalog to enter the market.
In summary, there are significant differences in the scope of application, certification methods, certifying bodies and standards, as well as market access requirements between explosion-proof certificates and explosion-proof 3C certifications. Therefore, when deciding which certification to pursue, it should be based on the specific product details and market access requirements. Should you have any questions or need further information, please feel free to contact Shenzhen ZhongNuo Testing Technology Co., Ltd. at any time.
Explosion-Proof Certification Application Consultancy Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.