"Gas leakage alarm controller system" is also called "gas leakage automatic alarm shut-off device". The national standard GB15322 is called: "Combustible Gas Detector".
"Combustible gas detectors" can currently be roughly divided into four types: "independent combustible gas detectors", "point combustible gas detectors", "portable combustible gas alarms", and "linear combustible gas detectors".
The first type is mostly used for civil gas leakage alarms. It has two types: single alarm type and alarm with gas valve closing type.
Category 2 and Category 3, Category 1 and Category 4 are mostly used for high-rise residential, commercial or industrial and mining buildings.
Because "combustible gas detector" products are special commodities that directly maintain the life and property safety of thousands of households, product performance, quality, and after-sales service will directly affect the safety of consumers' lives and property. Therefore, the state has strict regulations on the production and sales of such products, and has formulated some types of standards and regulations. Such products are listed in the Ministry of Public Security. Products directly managed by the Fire Department, and an annual inspection system is implemented. This shows how much the country attaches importance to this type of product.
The National Standard of the People's Republic of China GB15322 "Combustible Gas Detectors" is divided into seven parts. It is currently the only standard for testing the various types of combustible gas detectors mentioned above. Other local standards and industry standards will be invalid after the issuance of this standard. It is clearly stated in the preface of the standard that the technical requirements, test methods, signs, inspection rules and instructions for use in this part are mandatory.
Manufacturers and production plants that produce "combustible gas detectors" must strictly comply with the "Regulations of the People's Republic of China on Conscientious Approval" and the "Implementation Rules for Form Approval of Fire-fighting Products" to apply for type approval inspection from the Fire-fighting Products Conformity Assessment Center of the Ministry of Public Security, and then After meeting the approval conditions, samples of combustible gas detection and alarm products will be sent to the "National Fire Electronic Products Quality Supervision and Inspection Center" for testing. Only after confirming that all tested contents are fully qualified will the manufacturer and production plant be issued a type approval certificate and product approval. anti-counterfeiting mark. In the future, the Fire Protection Products Conformity Assessment Center of the Ministry of Public Security will conduct supervision and inspections of accredited enterprises every year to confirm the validity of the certificates and maintain the reliability of product production and quality.
It can be seen that the state attaches great importance to the quality of this type of products and has strict requirements for production enterprises.
However, in order to illegally seek personal gain, some companies in the society fundamentally ignore a series of mandatory standards and regulations set by the state for fire-fighting electronic products. They regard the safety of users' lives and property as child's play. When they no longer Knowing that companies and products cannot meet the certification and quality inspection requirements of the Ministry of Public Security's Fire Products Conformity Assessment Center, they use various unfair and even illegal means to promote low-quality or even shoddy products to the society and the public. They use deceptive means and use abolished standards to disguise inferior products as qualified products to mislead and deceive unsuspecting users. What's more, some companies take advantage of the uninformed media and use technological innovation products as a guise to use TV stations and newspapers to publicize and promote their fake and inferior products to the public. For this reason, users are advised to pay attention. When users purchase this product:
First, check to see if the product has a laser anti-counterfeiting mark specially made by the Fire Protection Product Conformity Assessment Center of the Ministry of Public Security, which is about the size of a thumbnail and has the words "Fire Protection Approved" inside. If there is no label even if it is certified by a certain organization and implements the XXX standard, it is an untrustworthy product.
two. If the product does not have a laser anti-counterfeiting mark approved by the school, even if the product is labeled as "Product quality liability insurance is borne by XXX insurance company, and compensation for product quality accidents will be XX million yuan", do not trust it. If it is really due to product quality accidents, When making a claim, the insurance company will point out that because the state requires mandatory certification of fire-fighting electronic products, and uncertified fire-fighting electronic products are shoddy and substandard products, the insurance company can refuse to compensate.
three. The product shell must indicate the implementation of the national standard GB15322-X "Combustible Gas Detector" x part x combustible gas detector; the cake must indicate the use of xx gas and alarm concentration xx% LEL; it must be stated here: the alarm concentration of the combustible gas detector The level depends on the design of the combustible gas detector. Of course, a high alarm sensitivity is better than a low alarm sensitivity for the combustible gas detector. However, for calibrated combustible gases such as natural gas, the alarm sensitivity should be designed according to the natural gas. For natural gas leakage, other Of course, a high alarm sensitivity is good, but for other things such as ethanol, the lower the sensitivity, the better. Otherwise, if the user puts some cooking wine when cooking, the flammable gas detector will immediately alarm, or even when the pot lid is opened and the water vapor is smoked, the alarm will immediately alarm. Calling the police is called a false alarm. This is a manifestation of unqualified product quality and is also a component of product inspection. Products with qualified quality will not cause false alarms, so users must pay attention when purchasing. Don't be misled by false advertising claims.
In addition, there is currently a single combustible gas detection alarm produced in the early stage installed on the market. This alarm does not have a gas valve shutoff device. If no one is at home when the gas leaks, then the gas leak exceeds the explosive concentration and an explosion is inevitable.
At present, the "Combustible Gas Detector" in the "Technical Regulations for Urban Gas Alarm Control System" formulated by the Ministry of Construction is a system composed of a combustible gas detector, a combustible gas alarm controller, and an emergency cut-off device. It is commonly known as: "Gas Alarm Control System". In fact, it is the "Gas Leak Alarm Controller" mentioned at the beginning of this article, also known as "Combustible Gas Detector", but it has a gas valve. Once a gas leak occurs, the gas A valve opener or solenoid valve will shut off the air supply in an emergency to prevent an accident from happening.
Therefore, users should consider it when subscribing. Because the "Technical Regulations for Urban Gas Alarm Control System" formulated by the Ministry of Construction is also a mandatory standard, a gas leak alarm control system must be installed. In this way, a single combustible gas detection alarm used in civilian households has little effect.