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

Process for applying for an explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Conduct product evaluation and preliminary quotation for the applied product. Evaluate the product based on the company's product description, electrical schematic diagram, and component list, determine the suitable type of explosion-proof certification for the product, and provide a preliminary quotation.
2. Offer samples for testing in the lab; the quantity of samples required varies depending on the product category.
3. Provide document list review
Application documents, including applicant's information and materials
(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 the product should be written in accordance with the prescribed format. The content should include not only the performance requirements of the product but also related aspects of explosion-proofness: 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-proofness.
B. Product Drawings: When applying for a explosion-proof certification for intrinsically safe electrical equipment, the applicant should provide assembly drawings, circuit diagrams, printed circuit board drawings, silk-screening drawings, material lists of components, and label drawings, etc. For non-intrinsically safe electrical equipment, the technical documents submitted for inspection should include drawings that reflect the explosion-proof performance of the sample (including assembly drawings and component drawings). If the assembly drawing clearly indicates the explosion-proof parameters and structure of the product, only the assembly drawing may be submitted for inspection.
C. Instruction Manual - The instruction manual should include basic parameters, explosion-proof markings, product外形 diagram, installation, maintenance, ordering instructions, and user warnings to ensure the product's explosion-proof performance during installation and use.
D. Other Documents: 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 shell products, provide the material and corresponding performance documents.
4. Certificate Issuance

In the explosion-proof electrical construction industry, the explosion-proof electrical equipment installation qualification certificate is a must-have for numerous corporate clients engaged in explosion-proof installation and construction projects.
This certificate can be processed through Shenzhen ZhongNuo Testing Technology Co., Ltd.
The process is simple: just provide the company name and at least 3 employee lists, attend a 2-day online training and exam, and you'll receive the certificate upon passing the exam.
Currently, there are several institutions in China that can issue this explosion-proof installation qualification certificate. The application procedures, costs, and requirements for the explosion-proof installation qualification certificates issued by different institutions vary. For more details, please consult Shenzhen ZhongNuo Testing Technology Co., Ltd.

What should be noted when applying for an explosion-proof certificate?
1. Is the product design in accordance with the GB/T3836 standards?
2. Can certification documents be provided?
(1) Technical Drawings: Includes circuit diagrams, assembly drawings, structural drawings, PCB layouts, numbering diagrams, BOM sheets, etc.
(2) Product Corporate Standards and Instruction Manual
(3) Product Name, Model Number, Applicant Company
(4) Samples: Complete machine samples, batteries, uncapped circuit boards, non-metallic material surface samples, etc.
(5) Additional Materials: Casting Sealing Process Documentation, Copy of Ex Component Explosion-Proof Certificate, Battery Testing Report, Shell Material Testing Report, Wireless Transmission Power Testing Report, etc.
Not all of the above information is required; it depends on the actual structure of the product and its explosion-proof type.
3. Do you have engineers with explosion-proof technology expertise?
4. Are there specific requirements for the frequency of occurrence and explosion-proof level?
5. Budget for costs
For more details, please feel free to contact Shenzhen ZhongNuo Testing Technology Co., Ltd. for further discussion!
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.