Although the security door industry has been around for many years, many consumers still lack a clear understanding of what makes a real security door. In this article, we’ll share some professional knowledge to help you make an informed decision when purchasing security doors in the future.
According to national regulations, a genuine security door must be able to resist forced entry for at least 6 minutes. This means that it should not be possible to break through the door using portable electric tools like chisels, screwdrivers, or drills within that time frame. In contrast, "steel doors" can typically be breached in under 5 minutes. So how can you tell the difference between a real security door and a steel door? The police recommend checking for a "steel seal" on the door, which indicates its safety level. These seals are usually marked with letters A, B, C, or D, and they are stamped in Song-style font near the upper corner of the inner hinge, about 160 cm from the ground. If your door doesn’t have this mark, it may not be a true security door.
Experts suggest that even D-class security doors are sufficient for most household needs. However, it's important to note that no matter if your door is equipped with an A-level or B-level lock, if it’s not properly locked, it offers no protection. Many people mistakenly believe that steel doors are the same as security doors, but in reality, steel doors don’t provide the same level of anti-theft protection. During the recent Science and Technology Publicity Week organized by the Taiyuan Municipal Public Security Bureau, the topic of door and window security became a hot issue. Reporters conducted interviews with police, quality inspectors, and dealers to reveal how to distinguish real security doors from fake ones.
The thickness of the steel plate in a security door frame is directly related to its security level. Even the lowest grade, Ding (D), must have a minimum steel thickness of 1.5 mm. The national standard divides security doors into four levels: A, B, C, and D. Each level has different requirements for anti-theft resistance. For example, Class A doors must withstand forced entry for at least 30 minutes, while Class D doors must last at least 6 minutes. Unfortunately, many homes in Taiyuan have what are actually just steel doors, not real security doors. This is a common misunderstanding among the public.
Some people worry that the filler material inside a security door might be paper, making it a fake product. However, the filler used in security doors is a special type of paper, approved by national testing agencies. It serves as insulation and soundproofing material, and it’s commonly used in both northern and southern regions. In fact, honeycomb paper is an effective insulator that helps reduce air circulation. This material is widely accepted by manufacturers and testing institutions across the country.
When evaluating the strength of a security door, it's essential to consider both the thickness of the steel plate and the quality of the lock mechanism. Sometimes, thicker doors aren’t necessarily safer. Also, it's important to understand that fire doors and security doors are entirely different concepts. Fire doors are designed for fire prevention and easy escape, while security doors focus on anti-theft performance. The more secure a door is, the harder it may be to open quickly, which could be a problem during emergencies.
The cheapest Ding-class security doors in the provincial capital market start at over 800 yuan. Many sellers emphasize the thickness and weight of the door as selling points, but these factors don't necessarily correlate with better security. According to the national standard implemented in 2008, there are specific requirements for steel thickness, door frame construction, and lock levels, but there are no strict rules about the filler material. Whether it's honeycomb paper in the south or polyphenylene in the north, both materials are approved and offer good insulation and soundproofing properties.
In conclusion, it's crucial for consumers to have a clear understanding of security door products. Knowing how to identify the correct security level and distinguishing between real security doors and steel doors will help you make smarter purchases and ensure better home safety.
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