Xi'an IB Explosion Proof Certification Application Process, Shenzhen ZhongNuo Inspection

Shenzhen Zhongnuo Inspection & Testing Technology Co., Ltd. is based in South China, specializing in explosion-proof certification and coal mine 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 "d" type explosion-proof enclosure
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 positive pressure enclosures "p"
GB/T 3836.6-2017, Part 6: Equipment protected by liquid immersion of "o" type for explosive atmospheres
GB/T 3836.7-2017 Explosive Atmospheres, Part 7: Equipment protected by sand filling 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 "m" type encapsulation

Currently, explosion-proof products are categorized into mining and non-mining types.
Coal mine site explosion-proof products require the Coal Safety Certification, which involves both explosion-proof performance testing and product performance standard testing. The certification process includes product testing, factory audit, and supervisory assessment, commonly known as factory inspection and annual audit. Applicants must have a production facility or a subcontracting factory.
Non-mining explosion-proof products require explosion-proof certification, which is divided into two types: explosion-proof certificate certification and explosion-proof 3C certification.
Products within the explosion-proof 3C certification catalog must obtain an explosion-proof 3C certification. This involves product testing, factory audit, and supervisory review.
Products not listed in the Explosion-Proof 3C Certification Catalogue only require product testing. A防爆合格证书 can be issued upon meeting the relevant requirements of GB/T 3836 standards.
Explosive-proof products for export require different safety certifications based on the export destination, such as ATEX and IECEx certifications. For more details, please consult ZhongNuo Inspection for further information.
We have long focused on providing domestic and international explosion-proof consultation services, familiar with standard requirements. We have some explosion-proof engineers and factory audit consultants who can help companies conveniently handle explosion-proof certification.

Key aspects to understand the meaning of explosion-proof certification symbols include:
Type of Explosion Proof
Common types include explosion-proof, denoted as "d", increased safety as "e", intrinsic safety as "i", and so on.
Different explosion-proof types mean different methods of explosion-proof technology are employed to prevent accidents. For instance, an explosion-proof type involves encapsulating components that might generate sparks or high temperatures within a sturdy housing. In the event of an internal accident within the housing, the housing can withstand pressure and prevent the flame from spreading outward.
Section II: Equipment Categories
Categorized into Classes I, II, and III.
Category I is primarily used in environments such as underground coal mines, which contain hazardous mixed substances.
II class applies to flammable and explosive environments other than coal mines, such as environments with combustible gases and steam commonly found in the petrochemical, gas, and other industries.
Class III for environments with combustible dust, such as flour mills and wood processing plants where combustible dust is present.
Section 3: Gas Groups
For II class equipment, further categorization is based on the characteristics of flammable and explosive gases. For example, categories such as IIA, IIB, IIC, etc. Gases in different groups have variations in ignition energy and ignition limits. For instance, IIC group gases are typically more dangerous, with lower ignition energy and a wider range of limits.
Section 4: Temperature Categories
The equipment allows for a high surface temperature range denoted by letters. For example, T1 to T6, where T1 indicates the equipment's high surface temperature can reach 450°C, and T6 indicates the high surface temperature does not exceed 85°C. The higher the temperature group, the lower the allowed surface temperature, and the safer it is in hazardous environments. When selecting equipment, it is essential to ensure the temperature group of the equipment is suitable for the ignition temperature of flammable and explosive gases that may be present in the environment.
By comprehensively understanding this information, one can accurately determine the applicable scope, explosion-proof performance, and safety level of a explosion-proof equipment, thereby ensuring its proper use and installation in hazardous environments.

What are the requirements for a company to apply for explosion-proof certification? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
For enterprises, there are no special requirements for applying for domestic explosion-proof certificates (except for the explosion-proof 3C certification).
Primarily, it's to assess if the product meets explosion-proof standards and whether the required certification documents can be provided.
If the product falls under the explosion-proof 3C certification category, the applicant must have a production factory (OEM/ODM is also acceptable).
Because the explosion-proof 3C certification is a certification model that involves both type testing and factory audit.
In addition to product testing, an annual audit of the manufacturing facility is required.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.