详情描述

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.
What standards are used for explosion-proof certification? What are the technical requirements?
An explosion-proof type is a type of explosion prevention for electrical equipment.
Its housing is capable of withstanding explosive mixtures entering the housing through the housing joint surfaces or structural gaps, without damage upon internal explosion.
And ignite an explosive gas atmosphere formed by one, multiple gases or vapors.
Explosion-proof casings must possess both explosion-proof and anti-explosion capabilities. Generally, the casings of explosion-proof products are rather bulky, suitable for products and equipment designed for fixed installations and use.
Combustion-proof joint width, gap, and roughness are the three key elements of explosion-proof housing design.
Design requirements for explosion-proof triad elements differ according to the different explosive gas environments of Mining I, Non-Mining IIA, IIB, and IIC.
Please refer to the design standards of GB/T3836.1 and GB/T3836.2.
ZhongNuo Inspection has long been dedicated to explosion-proof product design, testing, and certification services.
We have a team in the explosion-proof field, well-versed in explosion-proof standard requirements.
We offer explosion-proof housing design, illustration, modification guidance, and certification agency services.
If you have a need for this as well, feel free to message us anytime!
防爆认证申请资料清单
What is positive pressure explosion-proof? What technical requirements are there for obtaining a positive pressure explosion-proof certification for a product?
Positive pressure explosion-proof refers to introducing clean air or inert gas into the interior of the equipment.
Ensures internal equipment pressure exceeds the pressure of the external explosive environment, thus preventing explosive mixtures from entering the equipment, to achieve explosion-proof performance.
The positive pressure explosion-proof certification conforms to the standards GB/T 3836.1 and GB/T 3836.5.
Primarily, it assesses the equipment's ventilation time, pressure monitoring system, pressure range, blow-off, and alarm functions to meet explosion-proof performance requirements.
Positive pressure type includes three explosion-proof grades: pxb, pyb, and pzc.
Select the appropriate explosion-proof certification level based on product structure and explosion-proof zones.
Zhonuo Inspection has been in the explosion-proof industry for many years, well-versed in the requirements of the GB/T 3836 series standards.
Extensive experience in obtaining certifications for explosion-proof positive pressure systems.
We offer a one-stop service for explosion-proof guidance and consulting, including initial positive pressure explosion-proof design and rectification, drawing assessment, installation instructions, and certification acquisition.
Our successful cases include positive pressure ultrasonic shock plates, positive pressure omni-directional antennas, and positive pressure film thickness gauges.
If you have a need for this, feel free to private message us anytime!
防爆认证申请资料清单
List of Domestic Explosion-Proof Certification Agencies:
1. Nanyang CNEX
2. Shanghai Coal Research Institute
3. National Electrical Appliance Quality Supervision and Inspection Center
4. Guangdong CQCEx National Explosion-Proof Equipment Quality Supervision and Inspection Center
5. National Coal Mine Explosion-Proof Safety Product Quality Supervision and Inspection Center
6. Jiamusi Explosion-Proof Institute
7. Tianjin PCEC
8. Shanghai NEPSI
9. Beijing Coal Research Institute CCRI, etc.
For applicants, the type of explosion-proof model to apply for and the explosion-proof grade to choose are essentially the same across all authorized institutions. They are all certified and authorized by the state, with testing conditions that meet standard requirements, adhering to the same standards and conducting the same testing. In similar conditions, the trend is to choose institutions offering more cost-effective services at more reasonable prices, which is also a significant reason for the increasing popularity of emerging explosion-proof enterprises.
防爆认证申请资料清单
Which certifications are the ATEX and IECEx certifications from?
ATEX certification is a mandatory certification for explosion-proof products in the EU, a specific explosion directive under the CE certification, applicable to the EU and its regions.
IECEx is the International Electrotechnical Commission's explosion-proof electrical products certification system, which is voluntary and applicable to member countries of the IECEx scheme.
Most major economic powers globally are members of the IECEx system, including China.
For IECEx and ATEX certifications, ZhongNuo Inspection summarizes the following distinctions:
(1) Application Scope: ATEX certification is applicable to the EU region, IECEx certification is applicable to IECEx member countries.
(2) Whether mandatory, ATEX certification is mandatory, while IECEx is voluntary.
(3) Execution Standards, ATEX certification standards are IEC 60079 series, IECEx certification standards are IEC 60079 series
(4) Explosion-proof marking, the ATEX explosion-proof marking is more complex than the IECEx certification marking. You can see the clarity in the examples we have provided.
(5) Conversion issues: Currently, ATEX certification cannot be converted to certificates outside the EU. IECEx member countries, however, recognize IECEx certificates directly or indirectly, such as Australia and New Zealand which directly recognize IECEx certificates. Other IECEx member countries (like China) can convert their IECEx certificates into local explosion-proof certificates.
For more information on ATEX certification and IECEx certification, feel free to message us anytime!
Explosion Proof Certification Application Consultation Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.