Dark hinge and open hinge have different quality and process requirements for door structure. Generally, dark hinge armored door is higher than open hinge. Of course, the price of dark hinge armored door will be higher.
What is the concealed hinge? Do you have a concealed hinge? Can fire doors made of concealed hinges be qualified? Is it durable?
In fact, many consumers know that hinges are needed for the link between door and threshold. But most people don't know about dark hinges? I wonder what the dark hinge looks like? I don't know the stainless steel concealed hinge. Including the employees and salespeople of some door factories.
How about stainless steel concealed hinges? What's the difference with ordinary hinge?
The concealed hinge is the joint between the door and the threshold. Just like the joints of our human body, we need muscles to hold him up and can't see him.
The open hinge is like the joints of our human body, which are not held by muscles and are always exposed to the outside.
The concealed hinge is a complete joint, and the exposed hinge is like a joint with half the process.
Can concealed hinged armored doors fire doors? Can it pass the inspection and certification of the National Fire Prevention Center?
In fact, the fireproof performance of stainless steel concealed hinge is better than that of open hinge, because its stainless steel material and holding in the door core plate make the fireproof performance one or two levels higher than that of ordinary open hinge.
How stable is the concealed hinge?
The machining accuracy of stainless steel concealed hinge is very high, and the error rate is very small. Each process is precision machined. The stability of the product is quite high. 200000 use without fault!
Why is it difficult to see stainless steel concealed hinges?
Stainless steel concealed hinge is a high-end product. The market price is quite high. A concealed hinge with a force of 200kg costs about 2800 yuan. This is not easy for ordinary users and ordinary door factories to use.
Why can't we find fire doors and fire armored doors with concealed hinges?
In addition to the high price and cost, the concealed hinge has another feature: it has high requirements for the accuracy and structure of doors and thresholds. Doors with insufficient accuracy and poor structure cannot use concealed hinges. Many door factories are not only too expensive to use, but also the structural technology can not meet the installation requirements of concealed hinges. Therefore: at present, only door factories with high-end brands and very precise structure dare to use it. As for the brand with fire-proof armor door qualification, there are even fewer!
