Local work safety supervision departments, users of explosion-proof products and relevant insiders:

If the performance of explosion-proof products does not meet the requirements, they can not achieve their functions in the event of an explosion accident, which may cause serious consequences of mass casualties. Therefore, standardizing the market of explosion-proof products is an important matter related to safety production. In view of the recent events that explosion-proof products such as explosion-proof valve, spark detection device and flameless pressure relief device use electrical explosion-proof certificate as the proof basis for the effectiveness of explosion-proof performance, the company, based on social responsibility, makes a statement on the performance parameters and verification methods of explosion-proof valve, spark detection device and flameless pressure relief device, so as to avoid some speculative adverse effects The producers confuse the eyes with the fish, steal the concept, damage the rights and interests of the purchasers and users, and cause serious damage to the national safe production and healthy market environment.

1. Test standards and main performance parameters of explosion-proof products

(1) Flameproof valve

Test standard: en16447-2014 explosion proof flap valve

The main performance parameters include: explosion resistance (compressive capacity), explosion-proof capacity, minimum installation distance, maximum installation distance and applicable dust characteristics (explosion level st, whether it is metal dust or not), etc.

(2) Flameless pressure relief device

Test standard:

EN 16009-2011 flameless pressure relief device

The main performance parameters include: pressure relief efficiency and applicable dust characteristics (explosion level st, whether it is metal dust or not).

(3) Spark detection and extinguishing device

Test standard:

CEA 4035-2001 specification for spark detection systems technical requirements and test methods for spark detectors

CEA 4033-2000 specification for spark detection systems technical requirements and test methods for water-based spark extinguishing systems in pipelines

The main performance parameters include: detection distance of different temperature and size sparks, maximum applicable wind speed, system response time, etc.

2. The certificate of electrical explosion-proof can not be used as the basis of explosion-proof performance of non electrical explosion-proof products

Electrical explosion-proof is only a measure to prevent ignition source. Explosion protection also includes explosion isolation, explosion relief and other explosion control measures, as well as spark detection and extinguishment and other ignition source control measures. For explosion protection products other than explosion-proof electrical products, the electrical explosion-proof certificate can only prove that the electrical part of the product will not be the ignition source of some explosive dangerous environment, but not that the explosion-proof product has its expected functions (explosion isolation, explosion relief or spark detection and extinguishment).

At present, there is no national standard for explosion-proof products such as explosion-proof valve and flameless pressure relief. The performance test of relevant products shall refer to the EU standard. At present, the domestic institutions with relevant test capabilities include:

(1) Institute of industrial explosion and protection, Northeastern University

Test report no. query link: http://ciepi.neu.edu.cn/eq/epcert;

(2) Safety engineering center of Northeast University;

(3) National explosion proof equipment quality supervision and Inspection Center (Guangdong);

(4) Shenyang Institute of special equipment testing;

(5) National explosion proof equipment quality supervision and Inspection Center (Nanyang); http://www.cqstex.com/hgzcx.aspx

3. The authenticity of electrical explosion-proof certificate should be carefully verified

The fake explosion-proof certificate has appeared on the market, reminding all users to be cautious of being cheated. The website of each testing agency can query the explosion-proof certificate issued by the testing agency online. For example, the query link of "national explosion proof electrical product quality supervision and inspection center" is:

http://www.cqstex.com/hgzcx.aspx?type=0。

4. Product test report and certificate of the company

(1) flameproof valve

If any counterfeit certificate is found, the case may be reported to the public security organ.

In a word, the safety supervision department and the user should carefully verify the qualification documents of explosion-proof products. The user must purchase explosion-proof products with reliable performance to avoid serious consequences in case of explosion accidents.

              Wujiang tianwu special safety valve Co., Ltd